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Stainless Steel Angles, Channels & Flats
Product Overview
Stainless Steel Angles, Channels & Flats supplied by R V Metal Corporation are engineered structural and fabrication materials designed to deliver strength, durability, and corrosion resistance across a wide range of industrial and architectural applications. Manufactured and stocked in grades such as J7, J4, 201, 202, 301, 302, 304, 304L, 304H, 305, 308, 309, 309S, 310, 310S, 316, 316L, 316H, 316Ti, 317, 317L, 321, 321H, 347, 347H, 409L, 410, 410S, 420, 429, 430, 430Ti, 439, 441, 444, and Duplex S31803, these products cover everything from cost-effective general fabrication to high-performance chemical, marine, and high-temperature environments.
Stainless Steel Angles (L-sections) are widely used for framing, bracing, and structural support due to their excellent strength-to-weight ratio and ease of fabrication. Channels (C and U sections) offer superior load-bearing capability and rigidity, making them ideal for bases, skids, platforms, and heavy-duty frameworks. Stainless Steel Flats provide maximum versatility, serving as essential components for brackets, stiffeners, clamps, base plates, and machined parts, with availability in hot-rolled, cold-finished, and precision-ground conditions.
Austenitic grades like 304/304L and 316/316L are preferred for their outstanding corrosion resistance and weldability, while high-temperature grades such as 309, 310, 321, and 347 perform reliably under thermal stress. Ferritic and martensitic grades including 409L, 430, and 420 are selected where magnetic properties, oxidation resistance, or higher hardness are required. Duplex S31803 combines high strength with excellent resistance to chloride stress corrosion cracking, making it suitable for demanding structural and offshore applications.
Available in standard sizes as well as cut-to-length options, Stainless Steel Angles, Channels & Flats from R V Metal Corporation meet international standards and are suitable for fabrication, construction, OEM manufacturing, infrastructure, power plants, chemical processing, food processing, and architectural projects where reliability and long service life are non-negotiable.
Technical Specifications
| Specification Parameter | Stainless Steel Angles | Stainless Steel Channels | Stainless Steel Flats |
|---|---|---|---|
| Product Forms | L-Angles (Equal & Unequal) | C-Channels / U-Channels | Flat Bars / Strips |
| Grades Available | J7, J4, 201, 202, 301, 302, 304, 304L, 304H, 305, 308, 309, 309S, 310, 310S, 316, 316L, 316H, 316Ti, 317, 317L, 321, 321H, 347, 347H, 409L, 410, 410S, 420, 429, 430, 430Ti, 439, 441, 444, S31803 (Duplex) | ||
| Manufacturing Process | Hot Rolled / Laser Cut / Welded | Hot Rolled / Welded / Press-Formed | Hot Rolled / Cold Drawn / Slit & Cut |
| Size Range | 20×20×3 mm to 200×200×20 mm | 50×25×5 mm to 400×100×15 mm | 10×3 mm to 300×50 mm |
| Length | Standard 6 m / 12 m or Cut-to-Length | ||
| Thickness Range | 3 mm to 20 mm | 4 mm to 20 mm | 3 mm to 50 mm |
| Surface Finish | Hot Rolled (HR), Pickled & Passivated (P&P), Shot Blasted, Cold Finished, Machined (on request) | ||
| Density (Approx.) | Austenitic: ~7.93 g/cm³ | Ferritic/Martensitic: ~7.70 g/cm³ | Duplex: ~7.80 g/cm³ | ||
| Mechanical Strength (Typical) |
Tensile Strength: 450–750 MPa (grade dependent) Yield Strength: 205–550 MPa (grade dependent) |
||
| Corrosion Resistance | Excellent (Austenitic & Duplex) | Moderate to Good (Ferritic & Martensitic) | ||
| Heat Resistance | Up to 1100°C (309/310 grades), Moderate for standard austenitic grades | ||
| Magnetic Properties | Non-Magnetic (Austenitic) | Magnetic (Ferritic & Martensitic) | Partially Magnetic (Duplex) | ||
| Standards | ASTM A240 / A276 / A484, EN 10088, EN 10056, EN 10279, JIS G4304 / G4317 | ||
| Tolerances | As per ASTM / EN / JIS standards; tighter tolerances available on request | ||
| Testing & Certification | Mill Test Certificate (EN 10204 3.1), PMI, Mechanical & Chemical Testing | ||
| Typical Supply Condition | Annealed / Solution Treated / As Rolled (depending on grade & size) | ||
Chemical Composition
| Stainless Steel Grade Family | Representative Grades | C (%) | Cr (%) | Ni (%) | Mo (%) | Mn (%) | Si (%) | Other Elements |
|---|---|---|---|---|---|---|---|---|
| Austenitic – 200 Series | J7, J4, 201, 202 | ≤ 0.15 | 16.0 – 18.0 | 3.5 – 6.0 | – | 5.5 – 10.0 | ≤ 1.0 | N ≤ 0.25 |
| Austenitic – 300 Series (Standard) | 301, 302, 304, 304L, 304H, 305, 308 | 0.03 – 0.08 | 17.0 – 19.5 | 8.0 – 11.0 | – | ≤ 2.0 | ≤ 1.0 | N ≤ 0.10 |
| Austenitic – Heat Resistant | 309, 309S, 310, 310S | ≤ 0.08 | 22.0 – 26.0 | 12.0 – 22.0 | – | ≤ 2.0 | ≤ 1.5 | High Cr–Ni for oxidation resistance |
| Austenitic – Molybdenum Bearing | 316, 316L, 316H, 316Ti, 317, 317L | 0.03 – 0.08 | 16.0 – 18.5 | 10.0 – 15.0 | 2.0 – 3.5 | ≤ 2.0 | ≤ 1.0 | Ti stabilized in 316Ti |
| Austenitic – Stabilized Grades | 321, 321H, 347, 347H | ≤ 0.08 | 17.0 – 19.0 | 9.0 – 13.0 | – | ≤ 2.0 | ≤ 1.0 | Ti (321), Nb/Ta (347) |
| Ferritic Stainless Steel | 409L, 429, 430, 430Ti, 439, 441, 444 | ≤ 0.03 | 10.5 – 18.0 | ≤ 0.75 | – | ≤ 1.0 | ≤ 1.0 | Ti / Nb stabilized grades |
| Martensitic Stainless Steel | 410, 410S, 420 | 0.08 – 0.40 | 11.5 – 14.0 | ≤ 0.75 | – | ≤ 1.0 | ≤ 1.0 | Hardenable grades |
| Duplex Stainless Steel | S31803 (2205) | ≤ 0.03 | 21.0 – 23.0 | 4.5 – 6.5 | 2.5 – 3.5 | ≤ 2.0 | ≤ 1.0 | N 0.08 – 0.20 |
UNS Codes & Grades
| Grade / Trade Name | Family | UNS Designation | EN / Werkstoff No. (Typical) | Notes (Quick Identification) |
|---|---|---|---|---|
| J4 (market grade) | Austenitic (200-series type) | Not standardized (often closest to 201/202 variants) | Not fixed | Low/medium Ni; used as cost-effective 304 alternative; chemistry varies by mill. |
| J7 (market grade) | Austenitic (200-series type) | Not standardized (often closest to 202 variants) | Not fixed | Higher Mn/N; “J” grades are vendor-controlled—confirm MTC before committing. |
| 201 | Austenitic | S20100 | 1.4372 | Low Ni, higher Mn; economical; moderate corrosion resistance. |
| 202 | Austenitic | S20200 | 1.4373 | Higher Mn than 201; better formability than 201 in many mills. |
| 301 | Austenitic | S30100 | 1.4310 | High work-hardening; spring applications; good strength after cold work. |
| 302 | Austenitic | S30200 | 1.4310 (often aligned with 302/304 family) | General-purpose; similar family to 304; commonly in wire/strip markets. |
| 304 | Austenitic | S30400 | 1.4301 | Most common SS; good general corrosion resistance. |
| 304L | Austenitic | S30403 | 1.4307 | Low carbon for better weld corrosion resistance. |
| 304H | Austenitic | S30409 | 1.4948 | Higher carbon for elevated-temperature strength. |
| 305 | Austenitic | S30500 | 1.4303 | Lower work-hardening; good for deep drawing/spinning. |
| 308 | Austenitic | S30800 | — | Primarily known as welding filler; also available in some product forms. |
| 309 | Austenitic | S30900 | 1.4828 | Heat resistant; higher Cr/Ni for oxidation resistance. |
| 309S | Austenitic | S30908 | 1.4833 | Low carbon version for improved weldability. |
| 310 | Austenitic | S31000 | 1.4845 | Very high temperature oxidation resistance. |
| 310S | Austenitic | S31008 | 1.4845 | Low carbon 310; common for furnace parts. |
| 316 | Austenitic | S31600 | 1.4401 | Mo-bearing; better pitting resistance than 304. |
| 316L | Austenitic | S31603 | 1.4404 | Low carbon; preferred for welding/fabrication. |
| 316H | Austenitic | S31609 | 1.4919 | Higher carbon; elevated-temperature strength. |
| 316Ti | Austenitic | S31635 | 1.4571 | Ti-stabilized; resists sensitization in certain temperature ranges. |
| 317 | Austenitic | S31700 | 1.4449 | Higher Mo than 316; improved pitting resistance. |
| 317L | Austenitic | S31703 | 1.4438 | Low carbon 317; better weld corrosion resistance. |
| 321 | Austenitic | S32100 | 1.4541 | Ti-stabilized; good for high-temperature weldments. |
| 321H | Austenitic | S32109 | 1.4878 | Higher carbon 321; elevated-temperature strength. |
| 347 | Austenitic | S34700 | 1.4550 | Nb-stabilized; good resistance to intergranular corrosion after welding. |
| 347H | Austenitic | S34709 | 1.4961 | Higher carbon 347; high-temperature service. |
| 409L | Ferritic | S40900 / S40910 (409Cb) / S40920 (variants) | 1.4512 (typical 409 family) | Automotive/exhaust; moderate corrosion; good heat resistance. |
| 410 | Martensitic | S41000 | 1.4006 | Hardenable; higher strength; lower corrosion resistance than 304/316. |
| 410S | Ferritic (low-C 410) | S41008 | 1.4000 / 1.4003 (market dependent) | Non-hardenable/limited hardenability; used for welded fabrications. |
| 420 | Martensitic | S42000 | 1.4021 / 1.4028 | Higher hardness and wear resistance; cutlery/shafts. |
| 429 | Ferritic | S42900 | 1.4510 (typical 429 family) | Ferritic with improved oxidation resistance vs 430 in some conditions. |
| 430 | Ferritic | S43000 | 1.4016 | General ferritic; good formability; moderate corrosion resistance. |
| 430Ti | Ferritic (stabilized) | S43932 (common stabilized equivalent) / mill-specific | 1.4510 / 1.4509 (market dependent) | Stabilized for better weld performance; sold as “430Ti/439-type”. |
| 439 | Ferritic (stabilized) | S43035 | 1.4510 | Ti/Nb stabilized; improved weldability vs 430. |
| 441 | Ferritic (stabilized) | S44100 | 1.4509 | Good high-temperature oxidation; exhaust systems. |
| 444 | Ferritic (Mo-bearing) | S44400 | 1.4521 | Mo improves pitting resistance; “ferritic 316-like” in some uses. |
| S31803 (Duplex) | Duplex | S31803 | 1.4462 (commonly aligned with 2205 family) | High strength; excellent chloride stress corrosion cracking resistance. |
Mechanical, Physical & Fabrication Properties
| Grade Family | Grades Covered | Typical Tensile Strength (MPa) | Typical Yield Strength (MPa) | Elongation (%) | Hardness (HB / HRB) | Density (g/cm³) | Magnetic | Corrosion Resistance | Weldability | Formability | Machinability | Heat Treatment Response | Typical Use Notes (Angles / Channels / Flats) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 200 Series Austenitic (Economy) | J7, J4, 201, 202 | 520 – 860 | 240 – 450 | 35 – 55 | ~ 160 – 220 HB / 85 – 100 HRB | ~ 7.85 – 7.90 | Generally Non-magnetic (may become slightly magnetic after cold work) | Good (lower than 304; avoid aggressive chlorides) | Good | Good | Fair | Not hardenable by heat treatment (strength increases by cold work) | Cost-effective structural & decorative sections; indoor / mild outdoor service |
| 300 Series Austenitic (General Purpose) | 301, 302, 304, 304L, 304H, 305, 308 | 520 – 860 | 205 – 450 | 40 – 60 | ~ 140 – 200 HB / 70 – 95 HRB | ~ 7.90 – 7.93 | Non-magnetic (may become slightly magnetic after cold work) | Very Good (304/304L widely used) | Excellent (304L best for welded fabrication) | Excellent | Fair | Not hardenable by heat treatment (cold work strengthens) | Fabrication-friendly sections for frames, supports, architectural & general industry |
| Heat-Resistant Austenitic | 309, 309S, 310, 310S | 520 – 750 | 205 – 350 | 35 – 55 | ~ 150 – 210 HB / 80 – 98 HRB | ~ 7.85 – 7.90 | Non-magnetic (may be slightly magnetic after cold work) | Good (excellent oxidation resistance; not for strong chlorides) | Good to Excellent | Good | Fair | Not hardenable by heat treatment | High-temperature structural members, furnace frames, heat shields, process supports |
| Mo-Bearing Austenitic (Marine / Chemical) | 316, 316L, 316H, 316Ti, 317, 317L | 515 – 760 | 205 – 380 | 40 – 60 | ~ 140 – 210 HB / 70 – 95 HRB | ~ 7.95 – 8.00 | Non-magnetic (may become slightly magnetic after cold work) | Excellent (best vs chlorides among common grades) | Excellent (316L preferred for welding) | Very Good | Fair | Not hardenable by heat treatment | Coastal / chemical plant structures, marine supports, corrosive service frames |
| Stabilized Austenitic | 321, 321H, 347, 347H | 515 – 760 | 205 – 380 | 35 – 60 | ~ 150 – 220 HB / 75 – 98 HRB | ~ 7.90 – 7.95 | Non-magnetic (may become slightly magnetic after cold work) | Very Good (resists sensitization in welded/high-temp service) | Excellent | Very Good | Fair | Not hardenable by heat treatment | Welded structures in elevated temperatures (exhaust supports, hot process frames) |
| Ferritic Stainless Steel | 409L, 429, 430, 430Ti, 439, 441, 444 | 380 – 550 | 205 – 360 | 18 – 35 | ~ 140 – 200 HB / 75 – 95 HRB | ~ 7.65 – 7.75 | Magnetic | Good to Very Good (444 is strongest in corrosion among ferritics) | Good (444/439/441 better; some grades need control to avoid grain growth) | Fair to Good | Good | Not hardenable by heat treatment (limited strengthening) | Cost-efficient structural sections, mild corrosion environments, architectural trims |
| Martensitic Stainless Steel | 410, 410S, 420 | 480 – 800 (higher when heat treated) | 275 – 650 | 12 – 25 | ~ 180 – 260 HB (can be much higher after hardening) | ~ 7.70 – 7.75 | Magnetic | Moderate (lower than 304/316) | Fair (preheat/controlled welding often required) | Fair | Good | Hardenable by heat treatment (strength & hardness increase significantly) | Wear/strength focused sections, brackets, shafts/supports where corrosion is not severe |
| Duplex Stainless Steel | S31803 (Duplex / 2205 family) | 620 – 850 | 450 – 620 | 20 – 35 | ~ 240 – 290 HB | ~ 7.80 | Partially Magnetic | Excellent (chloride & SCC resistance much better than 304/316) | Good (needs correct filler & heat input control) | Good (higher strength reduces forming ease vs 304) | Fair | Not hardenable like martensitic; strength is from duplex structure | High-strength structural members for marine, offshore, chemical & chloride service |
Common Names & International Identifiers
| Grade / Market Name | Common Trade Names | UNS Code | EN / W.Nr. (Typical) | JIS (Typical) | Other International Identifiers | Common Buying Keywords (Angles / Channels / Flats) |
|---|---|---|---|---|---|---|
| J7 | J7 SS, Economy austenitic | Often sold as “201-type” (varies by mill) | Closest family: EN 1.4372 (201-type) / 1.4301 (304-type) depending on chemistry | Closest family: SUS201 / SUS304 (depending on chemistry) | “J-grade” is a market identifier (India); chemistry can vary—confirm MTC | SS angle J7, SS channel J7, SS flat J7 |
| J4 | J4 SS, Low-nickel austenitic | Often sold as “201-type” (varies by mill) | Closest family: EN 1.4372 (201-type) | Closest family: SUS201 | “J4” is a market identifier (India); verify exact composition on test certificate | SS angle J4, SS channel J4, SS flat J4 |
| 201 | 18Cr–(low Ni) austenitic, “Economy SS” | S20100 / S20153 (variants) | 1.4372 (typical) | SUS201 | Often used as cost alternative to 304 (check corrosion requirement) | SS angle 201, SS channel 201, SS flat 201 |
| 202 | 202 SS, “High Mn 200-series” | S20200 | Often referenced near 1.4373 / 1.4372 family (mill-dependent) | SUS202 | Common in architectural fabrication where chloride exposure is limited | SS angle 202, SS channel 202, SS flat 202 |
| 301 | Spring stainless, work-hardening grade | S30100 | 1.4310 | SUS301 | Often used where higher strength via cold work is needed | SS angle 301, SS channel 301, SS flat 301 |
| 302 | General purpose austenitic | S30200 | Closest family: 1.4310 / 1.4301 (application dependent) | SUS302 | Common for fasteners & formed parts; structural sections less common than 304 | SS angle 302, SS channel 302, SS flat 302 |
| 304 | 18/8 stainless, A2 stainless | S30400 | 1.4301 | SUS304 | Most common “general purpose stainless” worldwide | SS angle 304, SS channel 304, SS flat 304 |
| 304L | Low carbon 304, weld-friendly | S30403 | 1.4307 | SUS304L | Preferred for welded fabrication to reduce sensitization risk | SS angle 304L, SS channel 304L, SS flat 304L |
| 304H | High carbon 304 for high temperature | S30409 | 1.4948 (common reference) | SUS304H | Used where elevated-temperature strength is needed | SS angle 304H, SS channel 304H, SS flat 304H |
| 305 | Deep drawing stainless | S30500 | 1.4303 | SUS305 | Lower work hardening; mainly sheet/strip use | SS angle 305, SS channel 305, SS flat 305 |
| 308 | Welding grade (filler family), 308 SS | S30800 | Commonly referenced in welding consumables (not a typical structural section grade) | — | Mostly for weld metal / filler classification; verify if supplied as sections | SS angle 308, SS channel 308, SS flat 308 |
| 309 | Heat resistant stainless | S30900 | 1.4828 (typical) | SUS309 | High Cr-Ni; oxidation resistance at elevated temperature | SS angle 309, SS channel 309, SS flat 309 |
| 309S | Low carbon 309 | S30908 | 1.4833 (typical) | SUS309S | Better weldability vs 309 | SS angle 309S, SS channel 309S, SS flat 309S |
| 310 | High temperature stainless | S31000 | 1.4845 (typical) | SUS310 | Excellent oxidation resistance; furnace & heat equipment | SS angle 310, SS channel 310, SS flat 310 |
| 310S | Low carbon 310 | S31008 | 1.4845 (low carbon variant commonly referenced as 310S) | SUS310S | Preferred for welded high-temp structures | SS angle 310S, SS channel 310S, SS flat 310S |
| 316 | Marine grade stainless, A4 stainless | S31600 | 1.4401 | SUS316 | Mo-bearing; improved chloride corrosion resistance | SS angle 316, SS channel 316, SS flat 316 |
| 316L | Low carbon 316, weld-friendly marine grade | S31603 | 1.4404 | SUS316L | Preferred for welded marine/chemical fabrication | SS angle 316L, SS channel 316L, SS flat 316L |
| 316H | High carbon 316 for elevated temperature | S31609 | Often referenced near 1.4919 / 1.4401 family (mill dependent) | SUS316H | Used in high-temp service with better creep strength | SS angle 316H, SS channel 316H, SS flat 316H |
| 316Ti | Titanium stabilized 316 | S31635 | 1.4571 | SUS316Ti | Improved intergranular corrosion resistance after welding at high temps | SS angle 316Ti, SS channel 316Ti, SS flat 316Ti |
| 317 | High molybdenum austenitic | S31700 | 1.4449 (common reference) | SUS317 | Higher Mo than 316; better pitting resistance | SS angle 317, SS channel 317, SS flat 317 |
| 317L | Low carbon 317 | S31703 | 1.4438 / 1.4449 family (supplier dependent) | SUS317L | Weld-friendly high Mo grade | SS angle 317L, SS channel 317L, SS flat 317L |
| 321 | Titanium stabilized 304 | S32100 | 1.4541 | SUS321 | Good for welded parts exposed to 450–850°C range | SS angle 321, SS channel 321, SS flat 321 |
| 321H | High carbon 321 for high temperature | S32109 | 1.4878 (common reference) | SUS321H | Higher creep strength at elevated temperatures | SS angle 321H, SS channel 321H, SS flat 321H |
| 347 | Niobium stabilized stainless | S34700 | 1.4550 | SUS347 | Stabilized for welded high-temp service | SS angle 347, SS channel 347, SS flat 347 |
| 347H | High carbon 347 for high temperature | S34709 | 1.4940 (common reference) | SUS347H | Higher high-temp strength than 347 | SS angle 347H, SS channel 347H, SS flat 347H |
| 409L | Exhaust grade, low cost ferritic | S40900 / S40910 (variants) | 1.4512 (common reference) | SUS409L | Good oxidation resistance; moderate corrosion resistance | SS angle 409L, SS channel 409L, SS flat 409L |
| 410 | Hardenable stainless, martensitic | S41000 | 1.4006 | SUS410 | Heat treatable; higher strength, lower corrosion than 304 | SS angle 410, SS channel 410, SS flat 410 |
| 410S | Low carbon 410, non-hardenable variant | S41008 | 1.4000 / 1.4003 family (commonly referenced) | SUS410S | Better weldability than 410; used for fabrication | SS angle 410S, SS channel 410S, SS flat 410S |
| 420 | Hardenable stainless, high hardness | S42000 | 1.4021 / 1.4031 (variants) | SUS420 | High hardness/wear; lower corrosion resistance than 304/316 | SS angle 420, SS channel 420, SS flat 420 |
| 429 | Ferritic stainless | S42900 | Commonly referenced in 400-series ferritic family (mill dependent) | SUS429 | Better corrosion than 409; used in structural and trims | SS angle 429, SS channel 429, SS flat 429 |
| 430 | General ferritic stainless | S43000 | 1.4016 | SUS430 | Good formability; magnetic; widely used for interiors & mild corrosion | SS angle 430, SS channel 430, SS flat 430 |
| 430Ti | Ti stabilized ferritic | S43932 (common UNS family) / supplier dependent | 1.4509 / 1.4510 family (commonly referenced) | SUS430Ti / SUS439 (depending on spec) | Stabilized against sensitization; better weldability vs 430 | SS angle 430Ti, SS channel 430Ti, SS flat 430Ti |
| 439 | Stabilized ferritic stainless | S43900 | 1.4510 | SUS439 | Improved corrosion vs 430; good weldability | SS angle 439, SS channel 439, SS flat 439 |
| 441 | Stabilized ferritic stainless | S44100 | 1.4509 | SUS441 | Good oxidation resistance; commonly used in exhaust & fabrication | SS angle 441, SS channel 441, SS flat 441 |
| 444 | High corrosion ferritic (Mo-bearing) | S44400 | 1.4521 | SUS444 | Best corrosion resistance among common ferritics; chloride performance improved | SS angle 444, SS channel 444, SS flat 444 |
| S31803 (Duplex) | Duplex 2205 family, duplex stainless | S31803 | 1.4462 (often matched to duplex 2205 family) | — (commonly supplied to ASTM/EN duplex specs) | Often marketed as “Duplex 2205” (S32205 is the enhanced variant) | Duplex angle 2205, Duplex channel 2205, Duplex flat 2205 |
Standards & International Equivalents
| Grade | ASTM / UNS | EN / DIN (W.Nr.) | JIS | ISO / Other International References | Typical Notes for Angles, Channels & Flats |
|---|---|---|---|---|---|
| J7 | Market-equivalent to UNS S201xx / S304xx (mill specific) | Closest family: EN 1.4372 / 1.4301 (chemistry dependent) | SUS201 / SUS304 (approx.) | Indian market “J-grade” (verify MTC) | Economy austenitic grade; exact standard varies by producer |
| J4 | Market-equivalent to UNS S20100 / S20200 | EN 1.4372 (approx.) | SUS201 | Indian market identifier | Low-nickel austenitic; confirm corrosion suitability |
| 201 | ASTM A240 / A276 – UNS S20100 | EN 10088 – 1.4372 | SUS201 | ISO 15510 – X12CrMnNiN17-7-5 | Cost-effective alternative to 304 |
| 202 | ASTM A240 / A276 – UNS S20200 | EN 10088 – 1.4373 (reference family) | SUS202 | ISO 15510 – X12CrMnNiN18-9-5 | Architectural and light structural use |
| 301 | ASTM A240 / A276 – UNS S30100 | EN 10088 – 1.4310 | SUS301 | ISO 15510 – X10CrNi18-8 | High work-hardening characteristics |
| 302 | ASTM A240 / A276 – UNS S30200 | Closest family: 1.4310 / 1.4301 | SUS302 | ISO austenitic family | Less common than 304 for structural sections |
| 304 | ASTM A240 / A276 – UNS S30400 | EN 10088 – 1.4301 | SUS304 | ISO 15510 – X5CrNi18-10 | Most widely used stainless steel |
| 304L | ASTM A240 / A276 – UNS S30403 | EN 10088 – 1.4307 | SUS304L | ISO 15510 – X2CrNi18-9 | Preferred for welded fabrication |
| 304H | ASTM A240 – UNS S30409 | EN 10028 – 1.4948 | SUS304H | ISO heat-resistant family | High-temperature applications |
| 305 | ASTM A240 / A276 – UNS S30500 | EN 10088 – 1.4303 | SUS305 | ISO 15510 – X5CrNi18-12 | Excellent deep drawability |
| 308 | ASTM A240 / A276 – UNS S30800 | — | — | Commonly referenced in welding standards | Mostly used as welding filler classification |
| 309 / 309S | ASTM A240 – UNS S30900 / S30908 | EN 10095 – 1.4828 / 1.4833 | SUS309 / SUS309S | ISO heat-resistant grades | High-temperature structural sections |
| 310 / 310S | ASTM A240 – UNS S31000 / S31008 | EN 10095 – 1.4845 | SUS310 / SUS310S | ISO heat-resistant grades | Furnaces, kilns, heat-treatment equipment |
| 316 | ASTM A240 / A276 – UNS S31600 | EN 10088 – 1.4401 | SUS316 | ISO 15510 – X5CrNiMo17-12-2 | Marine and chemical environments |
| 316L | ASTM A240 / A276 – UNS S31603 | EN 10088 – 1.4404 | SUS316L | ISO 15510 – X2CrNiMo17-12-2 | Welded marine structures |
| 316H | ASTM A240 – UNS S31609 | EN 10028 – 1.4919 (reference) | SUS316H | ISO heat-resistant family | High-temperature pressure components |
| 316Ti | ASTM A240 – UNS S31635 | EN 10088 – 1.4571 | SUS316Ti | ISO stabilized austenitic grade | Improved resistance to intergranular corrosion |
| 317 / 317L | ASTM A240 – UNS S31700 / S31703 | EN 10088 – 1.4449 / 1.4438 | SUS317 / SUS317L | ISO high-Mo austenitic grades | Superior pitting resistance |
| 321 / 321H | ASTM A240 – UNS S32100 / S32109 | EN 10088 – 1.4541 / 1.4878 | SUS321 / SUS321H | ISO stabilized grades | High-temperature welded fabrication |
| 347 / 347H | ASTM A240 – UNS S34700 / S34709 | EN 10088 – 1.4550 / 1.4940 | SUS347 / SUS347H | ISO Nb-stabilized grades | Severe thermal cycling applications |
| 409L | ASTM A240 – UNS S40900 / S40910 | EN 10088 – 1.4512 | SUS409L | ISO ferritic family | Exhaust systems and structural supports |
| 410 / 410S | ASTM A240 – UNS S41000 / S41008 | EN 10088 – 1.4006 / 1.4000 | SUS410 / SUS410S | ISO martensitic grades | Higher strength, moderate corrosion resistance |
| 420 | ASTM A240 – UNS S42000 | EN 10088 – 1.4021 / 1.4031 | SUS420 | ISO martensitic grades | High hardness structural components |
| 429 / 430 / 430Ti | ASTM A240 – UNS S42900 / S43000 / S43932 | EN 10088 – 1.4016 / 1.4509 / 1.4510 | SUS429 / SUS430 / SUS430Ti | ISO ferritic grades | Architectural and general fabrication |
| 439 / 441 / 444 | ASTM A240 – UNS S43900 / S44100 / S44400 | EN 10088 – 1.4510 / 1.4509 / 1.4521 | SUS439 / SUS441 / SUS444 | ISO ferritic Mo-bearing grades | Enhanced corrosion and oxidation resistance |
| S31803 (Duplex) | ASTM A240 / A276 – UNS S31803 | EN 10088 – 1.4462 | — | ISO Duplex 2205 family | High strength & chloride resistance structural sections |
Applications
| Grade / Grade Group | Typical Applications – Angles, Channels & Flats | Industry Segments | Key Application Notes |
|---|---|---|---|
| J7, J4 | Structural frames, railings, supports, light fabrication | Construction, Interior, General Fabrication | Cost-effective austenitic grades; suitable for indoor and low-corrosion environments |
| 201, 202 | Architectural angles, cladding supports, furniture frames | Architecture, Furniture, Infrastructure | Low-nickel austenitic grades; good strength with moderate corrosion resistance |
| 301, 302 | High-strength channels, formed sections, load-bearing brackets | Automotive, Railways, Industrial Fabrication | High work-hardening rate; suitable for formed structural profiles |
| 304, 304L | General-purpose angles, channels, flats, structural frames | Construction, Food Processing, Equipment Manufacturing | Most widely used grades; excellent formability and corrosion resistance |
| 304H | High-temperature structural supports, furnace frames | Power Plants, Heat Treatment, Refineries | Higher carbon for improved high-temperature strength |
| 305 | Deep-formed channels, precision profiles | Fabrication, Sheet Metal Engineering | Excellent drawability; reduced work hardening |
| 308 | Structural members near welded zones | Fabrication, Welding Applications | Mainly referenced for weld compatibility in structural assemblies |
| 309, 309S | Heat shields, furnace channels, kiln supports | Cement, Steel Plants, Thermal Processing | Excellent oxidation resistance at elevated temperatures |
| 310, 310S | High-temperature structural frames, incinerator supports | Furnace Manufacturing, Energy Sector | Designed for continuous service at very high temperatures |
| 316, 316L | Marine structures, chemical plant supports, coastal frameworks | Marine, Chemical, Offshore, Pharmaceuticals | Molybdenum-bearing grades with superior corrosion resistance |
| 316H | High-temperature pressure equipment supports | Refineries, Power Generation | Higher carbon improves creep resistance |
| 316Ti | Welded structural sections in corrosive environments | Chemical Processing, Heat Exchangers | Titanium stabilized to prevent intergranular corrosion |
| 317, 317L | Heavy-duty chemical plant structures, tanks supports | Chemical, Fertilizer, Marine | Higher molybdenum content for aggressive environments |
| 321, 321H | High-temperature welded frames, exhaust structures | Aerospace, Power Plants | Stabilized for resistance to carbide precipitation |
| 347, 347H | Thermal cycling structural components, boiler supports | Energy, Petrochemical | Niobium stabilized for severe temperature fluctuations |
| 409L | Automotive frames, exhaust supports, structural brackets | Automotive, Transport | Ferritic grade with good oxidation resistance |
| 410, 410S | Structural parts requiring strength, wear-resistant frames | Industrial Machinery, Engineering | Martensitic grades; higher strength than austenitic steels |
| 420 | Heavy-duty brackets, wear-resistant structural elements | Mining, Mechanical Engineering | High hardness after heat treatment |
| 429, 430, 430Ti | Architectural sections, decorative channels, frames | Architecture, Appliances, Interiors | Ferritic grades; good surface finish and formability |
| 439, 441, 444 | Corrosion-resistant structural frames, industrial supports | Process Industries, Infrastructure | Enhanced corrosion and oxidation resistance |
| S31803 (Duplex) | High-strength load-bearing structures, offshore frameworks | Oil & Gas, Offshore, Marine, Chemical | Excellent strength-to-weight ratio and chloride resistance |
Common Stainless Steel Angles, Channels & Flats Dimensions Chart
Common Stainless Steel Angles, Channels & Flats — Dimensions & Theoretical Weight Chart
Theoretical weights below are calculated using typical stainless steel density as a baseline for austenitic grades (e.g., 304/316). Grade families are estimated using density correction factors: Ferritic/Martensitic ≈ 0.971 and Duplex S31803 ≈ 0.984 versus 304/316 baseline. Actual weights vary with manufacturing tolerances, corner radii, and finish.
A) Equal Angles (L × L × t)
| Size (Leg×Leg×t) mm | Area (mm²) | 304/316 (kg/m) | Ferritic/Mart. (kg/m) | Duplex S31803 (kg/m) |
|---|---|---|---|---|
| 25×25×3 | 141 | 1.12 | 1.09 | 1.10 |
| 40×40×4 | 304 | 2.41 | 2.34 | 2.37 |
| 50×50×5 | 475 | 3.77 | 3.66 | 3.71 |
| 65×65×6 | 744 | 5.90 | 5.73 | 5.80 |
| 75×75×6 | 864 | 6.85 | 6.65 | 6.74 |
| 100×100×8 | 1536 | 12.18 | 11.83 | 11.98 |
B) Unequal Angles (A × B × t)
| Size (A×B×t) mm | Area (mm²) | 304/316 (kg/m) | Ferritic/Mart. (kg/m) | Duplex S31803 (kg/m) |
|---|---|---|---|---|
| 50×25×5 | 350 | 2.78 | 2.70 | 2.74 |
| 75×50×6 | 714 | 5.66 | 5.50 | 5.57 |
| 100×50×8 | 1136 | 9.01 | 8.75 | 8.86 |
| 125×75×10 | 1900 | 15.07 | 14.64 | 14.83 |
C) Channels (C-Channel) — Approx. (H × B × t)
| Size (H×B×t) mm | Approx. Area (mm²) | 304/316 (kg/m) | Ferritic/Mart. (kg/m) | Duplex S31803 (kg/m) |
|---|---|---|---|---|
| 75×40×5 | 725 | 5.75 | 5.58 | 5.66 |
| 100×50×6 | 1128 | 8.95 | 8.69 | 8.80 |
| 150×75×8 | 2272 | 18.02 | 17.49 | 17.72 |
| 200×75×9 | 2988 | 23.69 | 23.01 | 23.31 |
D) Flats (W × t)
| Size (W×t) mm | Area (mm²) | 304/316 (kg/m) | Ferritic/Mart. (kg/m) | Duplex S31803 (kg/m) |
|---|---|---|---|---|
| 25×3 | 75 | 0.59 | 0.58 | 0.59 |
| 40×5 | 200 | 1.59 | 1.54 | 1.56 |
| 50×6 | 300 | 2.38 | 2.31 | 2.35 |
| 65×8 | 520 | 4.12 | 4.00 | 4.05 |
| 100×10 | 1000 | 7.93 | 7.70 | 7.80 |
Calculation Basis (for your QC/Engineering users)
| Item | Basis / Formula |
|---|---|
| Density Baseline | 304/316 (Austenitic) ≈ 7.93 g/cm³ (≈ 7930 kg/m³) |
| Weight Conversion | kg/m = Area(mm²) × 0.00793 (for 7.93 g/cm³) |
| Flat Area | Area = W × t |
| Equal Angle Area (approx.) | Area = t × (2L − t) |
| Unequal Angle Area (approx.) | Area = t × (A + B − t) |
| Channel Area (approx.) | Area = t × (2B + (H − 2t)) |
| Grade Weight Factors | Ferritic/Martensitic ≈ 0.971; Duplex S31803 ≈ 0.984 (multiply 304/316 weight) |
| Important Note | These are theoretical estimates; actual weights vary with radii, rolling tolerances, and standard/finish. |
