Copper Pipes, Tubes, Coils & Fittings
Explore
Stainless Steel Bars & Rods
Product Overview
R V Metal Corporation offers a comprehensive range of Stainless Steel Bars & Rods manufactured and supplied in a wide spectrum of austenitic, ferritic, martensitic, and duplex stainless steel grades including 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 stainless steel bars and rods are produced using high-quality raw materials and advanced processing techniques to ensure excellent corrosion resistance, mechanical strength, dimensional accuracy, and surface finish. Available in round, square, hexagonal, and flat forms, our stainless steel bars and rods are suitable for demanding applications across automotive, construction, oil & gas, chemical processing, power generation, marine, food processing, and heavy engineering industries. With options for hot-rolled, cold-drawn, annealed, solution-treated, and precision-ground finishes, R V Metal Corporation delivers stainless steel bar and rod solutions that meet international standards and critical performance requirements.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Forms | Round Bars, Square Bars, Hexagonal Bars, Flat Bars, Rods |
| Grade Range | 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, Cold Drawn, Cold Finished, Forged |
| Diameter Range (Round Bars) | 3 mm to 400 mm |
| Across Flats (Hex/Square) | 5 mm to 150 mm |
| Flat Bar Size | Width: 10 mm to 300 mm | Thickness: 3 mm to 100 mm |
| Standard Length | 3 m, 4 m, 6 m, 12 ft, 20 ft, or Cut-to-Length |
| Surface Finish | Black, Bright Drawn, Turned, Peeled, Polished, Ground |
| Heat Treatment Condition | Annealed, Solution Annealed, Quenched & Tempered (Martensitic), Cold Worked |
| Dimensional Tolerances | As per ASTM A276, ASTM A479, EN 10060, EN 10088, IS 6603 |
| Straightness | 1/1000 of Length (Standard) |
| Density | Approx. 7.7 – 8.0 g/cm³ (varies by grade) |
| Testing | Chemical Analysis, Mechanical Testing, PMI, Ultrasonic Testing (UT) |
| Standards | ASTM, ASME, EN, DIN, JIS, IS |
| Certification | Mill Test Certificate (EN 10204 3.1), Third-Party Inspection on Request |
| Typical Applications | Machining, Shafts, Fasteners, Valves, Structural Components, Automotive & Marine Parts |
Chemical Composition
| Grade / Family | C (%) | Cr (%) | Ni (%) | Mo (%) | Mn (%) | Si (%) | Other Elements |
|---|---|---|---|---|---|---|---|
| J7 / J4 (Low Nickel Austenitic) | ≤ 0.10 | 16.0 – 18.0 | 1.0 – 4.0 | — | 7.0 – 10.0 | ≤ 1.00 | N ≤ 0.20 |
| 201 / 202 | ≤ 0.15 | 16.0 – 18.0 | 3.5 – 6.0 | — | 5.5 – 10.0 | ≤ 1.00 | N ≤ 0.25 |
| 301 / 302 | ≤ 0.15 | 16.0 – 18.0 | 6.0 – 8.0 | — | ≤ 2.00 | ≤ 1.00 | — |
| 304 / 304L / 304H / 305 / 308 |
304: ≤0.08 304L: ≤0.03 304H: 0.04–0.10 |
18.0 – 20.0 | 8.0 – 12.0 | — | ≤ 2.00 | ≤ 1.00 | N ≤ 0.10 |
| 309 / 309S / 310 / 310S |
309: ≤0.20 309S/310S: ≤0.08 |
22.0 – 26.0 | 12.0 – 22.0 | — | ≤ 2.00 | ≤ 1.50 | Heat-resistant grades |
| 316 / 316L / 316H / 316Ti |
316: ≤0.08 316L: ≤0.03 316H: 0.04–0.10 |
16.0 – 18.0 | 10.0 – 14.0 | 2.0 – 3.0 | ≤ 2.00 | ≤ 1.00 | Ti stabilized (316Ti) |
| 317 / 317L | ≤ 0.08 / ≤ 0.03 | 18.0 – 20.0 | 11.0 – 15.0 | 3.0 – 4.0 | ≤ 2.00 | ≤ 1.00 | Higher Mo for corrosion |
| 321 / 321H |
321: ≤0.08 321H: 0.04–0.10 |
17.0 – 19.0 | 9.0 – 12.0 | — | ≤ 2.00 | ≤ 1.00 | Ti ≥ 5×C |
| 347 / 347H |
347: ≤0.08 347H: 0.04–0.10 |
17.0 – 19.0 | 9.0 – 13.0 | — | ≤ 2.00 | ≤ 1.00 | Nb stabilized |
| 409L / 410 / 410S / 420 (Martensitic) | 0.08 – 0.40 | 11.5 – 13.5 | ≤ 1.00 | — | ≤ 1.00 | ≤ 1.00 | Hardenable grades |
| 429 / 430 / 430Ti / 439 / 441 / 444 (Ferritic) | ≤ 0.08 | 16.0 – 19.0 | ≤ 0.75 | — / 1.75–2.5 (444) | ≤ 1.00 | ≤ 1.00 | Ti / Nb stabilized |
| S31803 (Duplex Stainless Steel) | ≤ 0.03 | 21.0 – 23.0 | 4.5 – 6.5 | 2.5 – 3.5 | ≤ 2.00 | ≤ 0.80 | N: 0.08 – 0.20 |
UNS Codes & Grades
| Grade | UNS Designation | Steel Family | Remarks |
|---|---|---|---|
| J7 | — (Non-UNS) | Austenitic (Low Nickel) | Proprietary / trade grade, no official UNS |
| J4 | — (Non-UNS) | Austenitic (Low Nickel) | Nickel-saving grade, not covered under ASTM UNS |
| 201 | S20100 | Austenitic | High Mn, low Ni stainless steel |
| 202 | S20200 | Austenitic | Improved corrosion resistance vs 201 |
| 301 | S30100 | Austenitic | High work-hardening rate |
| 302 | S30200 | Austenitic | General-purpose austenitic stainless steel |
| 304 | S30400 | Austenitic | Most widely used stainless steel |
| 304L | S30403 | Austenitic | Low carbon for welding applications |
| 304H | S30409 | Austenitic | Higher carbon for high-temperature strength |
| 305 | S30500 | Austenitic | Reduced work hardening |
| 308 | S30800 | Austenitic | Often used as welding filler metal grade |
| 309 | S30900 | Austenitic | High Cr-Ni for heat resistance |
| 309S | S30908 | Austenitic | Low carbon heat-resistant grade |
| 310 | S31000 | Austenitic | Excellent oxidation resistance |
| 310S | S31008 | Austenitic | Low carbon high-temperature alloy |
| 316 | S31600 | Austenitic | Mo-bearing, improved corrosion resistance |
| 316L | S31603 | Austenitic | Low carbon, weld-friendly |
| 316H | S31609 | Austenitic | High-temperature service |
| 316Ti | S31635 | Austenitic | Titanium stabilized |
| 317 | S31700 | Austenitic | Higher Mo than 316 |
| 317L | S31703 | Austenitic | Low carbon, chemical processing grade |
| 321 | S32100 | Austenitic | Titanium stabilized |
| 321H | S32109 | Austenitic | High carbon for elevated temperature |
| 347 | S34700 | Austenitic | Niobium stabilized |
| 347H | S34709 | Austenitic | High carbon heat-resistant grade |
| 409L | S40900 | Ferritic | Automotive exhaust grade |
| 410 | S41000 | Martensitic | Hardenable stainless steel |
| 410S | S41008 | Martensitic | Low carbon martensitic grade |
| 420 | S42000 | Martensitic | High hardness and wear resistance |
| 429 | S42900 | Ferritic | Chromium stabilized ferritic steel |
| 430 | S43000 | Ferritic | General-purpose ferritic stainless steel |
| 430Ti | S43900 | Ferritic | Titanium stabilized version of 430 |
| 439 | S43900 | Ferritic | Improved weldability and formability |
| 441 | S44100 | Ferritic | Nb-Ti stabilized ferritic steel |
| 444 | S44400 | Ferritic | Mo-bearing ferritic stainless steel |
| S31803 (Duplex) | S31803 / S32205 | Duplex Stainless Steel | High strength, excellent chloride resistance |
Mechanical, Physical & Fabrication Properties
| Grade Group | Typical Grades Covered | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness | Density (g/cm³) | Fabrication Characteristics |
|---|---|---|---|---|---|---|---|
| Low-Nickel Austenitic | J7, J4 | 520 – 680 | 210 – 300 | 35 – 45 | HRB 85 – 95 | 7.85 – 7.90 | Good formability, moderate corrosion resistance, limited weldability control required |
| Austenitic (200 Series) | 201, 202 | 515 – 750 | 275 – 345 | 30 – 40 | HRB 90 – 100 | 7.85 – 7.90 | Excellent formability, higher work hardening, lower corrosion resistance than 300 series |
| Austenitic (300 Series – Standard) | 301, 302, 304, 305, 308 | 515 – 750 | 205 – 310 | 40 – 55 | HRB 70 – 95 | 7.90 – 8.00 | Excellent weldability, cold work increases strength significantly |
| Austenitic (Low / High Carbon) | 304L, 304H | 515 – 735 | 170 – 290 | 40 – 55 | HRB 70 – 90 | 7.90 – 8.00 | 304L ideal for welding, 304H preferred for high-temperature service |
| Heat Resistant Austenitic | 309, 309S, 310, 310S | 520 – 760 | 205 – 310 | 35 – 50 | HRB 80 – 95 | 7.90 – 8.00 | Excellent oxidation resistance, suitable for continuous high-temperature exposure |
| Molybdenum Bearing Austenitic | 316, 316L, 316H, 316Ti, 317, 317L | 515 – 760 | 205 – 310 | 40 – 55 | HRB 70 – 95 | 7.98 – 8.03 | Excellent corrosion resistance, superior pitting resistance, good weldability |
| Stabilized Austenitic | 321, 321H, 347, 347H | 515 – 760 | 205 – 310 | 40 – 55 | HRB 75 – 95 | 7.90 – 8.00 | Resistant to intergranular corrosion, ideal for welded high-temperature parts |
| Ferritic Stainless Steel | 409L, 429, 430, 430Ti, 439, 441, 444 | 380 – 550 | 170 – 310 | 20 – 30 | HRB 75 – 90 | 7.70 – 7.75 | Magnetic, good oxidation resistance, limited formability vs austenitic grades |
| Martensitic Stainless Steel | 410, 410S, 420 | 480 – 760 | 275 – 450 | 15 – 25 | HRC 20 – 50 | 7.75 – 7.80 | Heat treatable, high strength and hardness, limited corrosion resistance |
| Duplex Stainless Steel | S31803 | 620 – 880 | 450 – 550 | 25 – 35 | HRB 90 – 100 | 7.80 | High strength, excellent chloride stress corrosion resistance, controlled welding required |
Common Names & International Identifiers
| Grade | Common / Trade Names | UNS | EN / W.Nr. | JIS | Typical International Identifier / Notes |
|---|---|---|---|---|---|
| J4 | J4 Stainless (200-series type) | — (trade designation) | — | — | Market grade used in India; chemistry can vary by producer |
| J7 | J7 Stainless (200-series type) | — (trade designation) | — | — | Market grade used in India; chemistry can vary by producer |
| 201 | 18Cr-4~6Ni-Mn Stainless, “201 SS” | S20100 | 1.4372 | SUS201 | Cost-effective austenitic; higher Mn, lower Ni vs 304 |
| 202 | “202 SS” (higher Ni vs 201) | S20200 | 1.4373 | SUS202 | Austenitic; improved corrosion vs 201 in many service environments |
| 301 | High Work-Hardening Stainless, “301 SS” | S30100 | 1.4310 | SUS301 | Used where high strength after cold work is needed |
| 302 | General Purpose Austenitic, “302 SS” | S30200 | 1.4310 (commonly grouped with 301/304 family) | SUS302 | Often used for fasteners/wire; similar family to 304 |
| 304 | 18/8 Stainless, “A2 Stainless” (fasteners) | S30400 | 1.4301 | SUS304 | Most common austenitic stainless for general service |
| 304L | Low Carbon 304, “304L SS” | S30403 | 1.4307 | SUS304L | Preferred for welding; reduces sensitization risk |
| 304H | High Carbon 304, “304H SS” | S30409 | 1.4948 | SUS304H | Better high-temperature strength than 304/304L |
| 305 | Deep Drawing Stainless, “305 SS” | S30500 | 1.4303 | SUS305 | Lower work-hardening; excellent formability |
| 308 | 308 SS (often referenced as welding filler family) | S30800 | — | — | Commonly used as welding filler classification; base-metal equivalents vary |
| 309 | Heat Resistant Stainless, “309 SS” | S30900 | 1.4828 | SUS309 | High Cr-Ni for elevated-temperature oxidation resistance |
| 309S | Low Carbon 309, “309S SS” | S30908 | 1.4833 | SUS309S | Improved weldability vs 309 |
| 310 | High Temp Stainless, “310 SS” | S31000 | 1.4845 | SUS310 | Excellent oxidation resistance at high temperature |
| 310S | Low Carbon 310, “310S SS” | S31008 | 1.4845 (commonly used) | SUS310S | Weld-friendly high-temperature grade |
| 316 | Marine Stainless, “A4 Stainless” (fasteners) | S31600 | 1.4401 | SUS316 | Mo-bearing austenitic; better pitting resistance than 304 |
| 316L | Low Carbon 316, “316L SS” | S31603 | 1.4404 | SUS316L | Preferred for welding; common in pharma/chemical service |
| 316H | High Carbon 316, “316H SS” | S31609 | 1.4919 | SUS316H | Higher strength at elevated temperature vs 316L |
| 316Ti | Titanium Stabilized 316, “316Ti SS” | S31635 | 1.4571 | SUS316Ti | Improved resistance to sensitization in high-temp welded service |
| 317 | Higher Mo Stainless, “317 SS” | S31700 | 1.4449 (commonly used for 317 family) | SUS317 | Higher Mo than 316; improved pitting/crevice resistance |
| 317L | Low Carbon 317, “317L SS” | S31703 | 1.4438 (often referenced for 317L family) | SUS317L | Weld-friendly higher-Mo austenitic |
| 321 | Titanium Stabilized 304, “321 SS” | S32100 | 1.4541 | SUS321 | Resists intergranular corrosion after welding / high-temp exposure |
| 321H | High Carbon 321, “321H SS” | S32109 | 1.4878 | SUS321H | Improved creep strength for high temperature |
| 347 | Niobium Stabilized Austenitic, “347 SS” | S34700 | 1.4550 | SUS347 | Stabilized grade for welded high-temp service |
| 347H | High Carbon 347, “347H SS” | S34709 | 1.4961 | SUS347H | Higher strength for elevated temperature applications |
| 409L | Stabilized Ferritic Stainless, “409L SS” | S40900 / S40910 (used in various specs) | 1.4512 | SUS409L | Automotive/exhaust grade; good oxidation resistance |
| 410 | 13Cr Martensitic, “410 SS” | S41000 | 1.4006 | SUS410 | Heat-treatable; good strength, moderate corrosion resistance |
| 410S | Low Carbon 410, “410S SS” | S41008 | 1.4000 | SUS410S | Improved weldability vs 410; lower hardenability |
| 420 | Hardenable Martensitic, “420 SS” | S42000 | 1.4021 / 1.4034 (varies by condition) | SUS420J1 / SUS420J2 | High hardness after heat treatment; wear resistant |
| 429 | Ferritic Stainless, “429 SS” | S42900 | — | — | Ferritic grade with improved corrosion/oxidation vs 409 |
| 430 | 18Cr Ferritic Stainless, “430 SS” | S43000 | 1.4016 | SUS430 | Magnetic ferritic; common for interior/architectural use |
| 430Ti | Titanium Stabilized 430 | — | — | — | Stabilized ferritic variant; designation depends on standard/mill |
| 439 | Stabilized Ferritic Stainless, “439 SS” | S43900 | 1.4510 | SUS439 | Improved weldability and corrosion vs 430 |
| 441 | Stabilized Ferritic Stainless, “441 SS” | S44100 | 1.4509 | SUS441 | Good high-temp oxidation resistance; exhaust applications |
| 444 | Mo-bearing Ferritic Stainless, “444 SS” | S44400 | 1.4521 | — | Higher corrosion resistance ferritic; chloride service improvements |
| S31803 (Duplex) | Duplex 2205 (commonly traded family) | S31803 | 1.4462 (commonly used for 2205 family) | — | Duplex stainless (austenitic + ferritic); high strength and chloride SCC resistance |
Standards & International Equivalents
| Grade | ASTM / ASME | UNS | EN (W.Nr.) | JIS | DIN / ISO Reference |
|---|---|---|---|---|---|
| J4 | — (Trade Grade) | — | — | — | Indian market designation (no fixed global standard) |
| J7 | — (Trade Grade) | — | — | — | Indian market designation (chemistry varies by mill) |
| 201 | ASTM A276 / A479 | S20100 | 1.4372 | SUS201 | DIN EN 10088-3 |
| 202 | ASTM A276 / A479 | S20200 | 1.4373 | SUS202 | DIN EN 10088-3 |
| 301 | ASTM A276 / A479 | S30100 | 1.4310 | SUS301 | DIN EN 10088-3 |
| 302 | ASTM A276 / A479 | S30200 | 1.4310 | SUS302 | DIN EN 10088-3 |
| 304 | ASTM A276 / A479 | S30400 | 1.4301 | SUS304 | DIN EN 10088-3 / ISO 15510 |
| 304L | ASTM A276 / A479 | S30403 | 1.4307 | SUS304L | DIN EN 10088-3 / ISO 15510 |
| 304H | ASTM A276 / A479 | S30409 | 1.4948 | SUS304H | DIN EN 10088-3 |
| 305 | ASTM A276 / A479 | S30500 | 1.4303 | SUS305 | DIN EN 10088-3 |
| 308 | ASTM A276 / A479 | S30800 | — | — | Mainly referenced as welding consumable grade |
| 309 | ASTM A276 / A479 | S30900 | 1.4828 | SUS309 | DIN EN 10088-3 |
| 309S | ASTM A276 / A479 | S30908 | 1.4833 | SUS309S | DIN EN 10088-3 |
| 310 | ASTM A276 / A479 | S31000 | 1.4845 | SUS310 | DIN EN 10088-3 |
| 310S | ASTM A276 / A479 | S31008 | 1.4845 | SUS310S | DIN EN 10088-3 |
| 316 | ASTM A276 / A479 | S31600 | 1.4401 | SUS316 | DIN EN 10088-3 / ISO 15510 |
| 316L | ASTM A276 / A479 | S31603 | 1.4404 | SUS316L | DIN EN 10088-3 / ISO 15510 |
| 316H | ASTM A276 / A479 | S31609 | 1.4919 | SUS316H | DIN EN 10088-3 |
| 316Ti | ASTM A276 / A479 | S31635 | 1.4571 | SUS316Ti | DIN EN 10088-3 |
| 317 | ASTM A276 / A479 | S31700 | 1.4449 | SUS317 | DIN EN 10088-3 |
| 317L | ASTM A276 / A479 | S31703 | 1.4438 | SUS317L | DIN EN 10088-3 |
| 321 | ASTM A276 / A479 | S32100 | 1.4541 | SUS321 | DIN EN 10088-3 |
| 321H | ASTM A276 / A479 | S32109 | 1.4878 | SUS321H | DIN EN 10088-3 |
| 347 | ASTM A276 / A479 | S34700 | 1.4550 | SUS347 | DIN EN 10088-3 |
| 347H | ASTM A276 / A479 | S34709 | 1.4961 | SUS347H | DIN EN 10088-3 |
| 409L | ASTM A276 / A479 | S40900 | 1.4512 | SUS409L | DIN EN 10088-3 |
| 410 | ASTM A276 / A479 | S41000 | 1.4006 | SUS410 | DIN EN 10088-3 |
| 410S | ASTM A276 / A479 | S41008 | 1.4000 | SUS410S | DIN EN 10088-3 |
| 420 | ASTM A276 / A479 | S42000 | 1.4021 / 1.4034 | SUS420 | DIN EN 10088-3 |
| 429 | ASTM A276 / A479 | S42900 | — | — | Ferritic stainless – limited EN mapping |
| 430 | ASTM A276 / A479 | S43000 | 1.4016 | SUS430 | DIN EN 10088-3 |
| 430Ti | ASTM A276 / A479 | — | — | — | Titanium-stabilized ferritic variant (mill-specific) |
| 439 | ASTM A276 / A479 | S43900 | 1.4510 | SUS439 | DIN EN 10088-3 |
| 441 | ASTM A276 / A479 | S44100 | 1.4509 | SUS441 | DIN EN 10088-3 |
| 444 | ASTM A276 / A479 | S44400 | 1.4521 | — | DIN EN 10088-3 |
| S31803 (Duplex) | ASTM A276 / A479 | S31803 | 1.4462 | — | Duplex 2205 family (ISO / EN equivalent) |
Applications
| Stainless Steel Grade | Typical Applications of Bars & Rods |
|---|---|
| J4 / J7 | Cost-sensitive architectural bars, railing systems, decorative fittings, furniture frames, non-critical structural supports |
| 201 / 202 | Automotive trims, bus body components, kitchen equipment, handrails, fasteners, light structural applications |
| 301 / 302 | Cold-worked shafts, springs, fasteners, threaded rods, aerospace and rail components requiring high strength |
| 304 | General engineering shafts, food processing equipment, architectural bars, chemical equipment, fasteners |
| 304L | Welded structures, pharmaceutical equipment, pressure components, corrosion-resistant fasteners |
| 304H | Heat exchangers, boiler parts, furnace components, high-temperature structural rods |
| 305 | Cold heading applications, drawn bars, fasteners requiring excellent formability |
| 308 | Welding filler rods, high-temperature fasteners, joining dissimilar stainless steels |
| 309 / 309S | Furnace parts, heat-resistant shafts, kiln components, petrochemical equipment |
| 310 / 310S | High-temperature rods, radiant tubes, heat treatment fixtures, combustion chambers |
| 316 | Marine hardware, pump shafts, valves, chemical processing equipment, pharmaceutical machinery |
| 316L | Marine fasteners, medical implants, food-grade equipment, welded chemical structures |
| 316H | High-temperature pressure parts, refinery equipment, heat exchangers |
| 316Ti | Stabilized rods for elevated temperatures, exhaust systems, chemical reactors |
| 317 / 317L | Severe corrosion environments, chemical tanks, pulp & paper equipment, offshore components |
| 321 / 321H | Aerospace components, exhaust manifolds, high-temperature shafts, thermal processing equipment |
| 347 / 347H | Pressure vessels, refinery piping supports, nuclear and high-heat applications |
| 409L | Automotive exhaust rods, muffler supports, heat-resistant structural bars |
| 410 / 410S | Pump shafts, valve stems, turbine components, moderate corrosion resistance parts |
| 420 | Cutlery rods, surgical instruments, wear-resistant shafts, tooling components |
| 429 / 430 / 430Ti | Architectural bars, appliance components, automotive trim, exhaust systems |
| 439 / 441 | Automotive exhaust systems, heat-resistant rods, oxidation-resistant structural parts |
| 444 | Seawater applications, heat exchangers, desalination equipment, corrosion-critical structures |
| S31803 (Duplex) | Offshore oil & gas shafts, marine structures, pressure vessels, high-strength corrosion-resistant components |
Common Stainless Steel Bars & Rods Dimensions Chart
R V Metal Corporation supplies stainless steel bars and rods across a wide range of grades including 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. Availability varies by grade, finish (black / bright), condition (hot rolled / cold drawn), and size. Below are practical “common supply” ranges and theoretical weight charts for standard forms used in machining, fabrication, and OEM production.
A) Available Forms & Common Stock Size Ranges
| Product Form | Typical Stock Sizes | Standard Lengths | Supply Condition |
|---|---|---|---|
| Round Bars / Rods | Ø 3 mm to 300 mm (hot rolled / cold drawn) | 3 m, 4 m, 6 m (cut-to-length) | HR / CD / Turned & Polished |
| Hex Bars | AF 6 mm to 65 mm (cold drawn) | 3 m, 4 m, 6 m | CD / Bright |
| Square Bars | 6×6 mm to 80×80 mm | 3 m, 4 m, 6 m | HR / CD |
| Flat Bars | 3×20 mm to 25×200 mm (and above on request) | 3 m, 4 m, 6 m | HR / CD |
| Wire / Coils (optional) | Ø 0.3 mm to 12 mm | Coil | Bright / Annealed |
B) Theoretical Weight Calculation Reference
| Form | Weight Formula (kg/m) | Where (mm) | Notes |
|---|---|---|---|
| Round bar | W = (π/4) × d² × 0.00793 | d = diameter | Density assumed 7.93 g/cm³ (typical stainless) |
| Hex bar (AF) | W = (√3/2) × AF² × 0.00793 | AF = across flats | Regular hexagon |
| Square bar | W = a² × 0.00793 | a = side | — |
| Flat bar | W = t × w × 0.00793 | t = thickness, w = width | — |
C) Round Bars / Rods — Dia vs Theoretical Weight (kg/m)
| Round Bar Dia (mm) | Theoretical Weight (kg/m) |
|---|---|
| 6 | 0.224 |
| 8 | 0.398 |
| 10 | 0.623 |
| 12 | 0.897 |
| 16 | 1.595 |
| 20 | 2.492 |
| 25 | 3.894 |
| 30 | 5.607 |
| 32 | 6.383 |
| 40 | 9.969 |
| 50 | 15.577 |
| 60 | 22.431 |
| 65 | 26.334 |
| 80 | 39.876 |
| 100 | 62.304 |
| 125 | 97.350 |
| 150 | 140.184 |
| 200 | 249.216 |
D) Hex Bars — AF vs Theoretical Weight (kg/m)
| Hex Bar AF (mm) | Theoretical Weight (kg/m) |
|---|---|
| 10 | 0.687 |
| 12 | 0.989 |
| 14 | 1.347 |
| 17 | 1.986 |
| 19 | 2.483 |
| 22 | 3.329 |
| 24 | 3.961 |
| 27 | 5.009 |
| 30 | 6.185 |
| 32 | 7.040 |
| 36 | 8.910 |
| 41 | 11.560 |
| 46 | 14.552 |
| 50 | 17.171 |
E) Square Bars — Size vs Theoretical Weight (kg/m)
| Square Bar (mm) | Theoretical Weight (kg/m) |
|---|---|
| 10×10 | 0.793 |
| 12×12 | 1.142 |
| 16×16 | 2.030 |
| 20×20 | 3.172 |
| 25×25 | 4.956 |
| 30×30 | 7.137 |
| 40×40 | 12.688 |
| 50×50 | 19.825 |
F) Flat Bars — Thickness × Width vs Theoretical Weight (kg/m)
| Flat Bar Thickness (mm) | Width (mm) | Theoretical Weight (kg/m) |
|---|---|---|
| 3 | 20 | 0.476 |
| 3 | 25 | 0.595 |
| 3 | 50 | 1.190 |
| 5 | 25 | 0.991 |
| 5 | 50 | 1.983 |
| 6 | 25 | 1.190 |
| 6 | 50 | 2.379 |
| 8 | 50 | 3.172 |
| 10 | 50 | 3.965 |
| 10 | 100 | 7.930 |
| 12 | 50 | 4.758 |
| 12 | 100 | 9.516 |
Note: Weights are theoretical (kg/m) assuming density 7.93 g/cm³. Actual weights vary with grade family (200/300/400/duplex), finish/condition, and dimensional tolerances. For project-critical calculations, use the exact certified density/standard and your ordered tolerance.
Theoretical weights are based on density and bar diameter. Values below use austenitic stainless steel (e.g., 304/316) as the baseline; grade-wise variations are applied via density correction factors. Tolerances vary by standard (ASTM/EN/JIS) and heat/finish.
G) Universal Size & Weight (Baseline: Austenitic Grades — 304/316)
| Diameter (mm) | Weight (kg/m) | Diameter (inch) | Weight (kg/m) |
|---|---|---|---|
| 3 | 0.06 | 1/8" | 0.06 |
| 5 | 0.16 | 1/4" | 0.25 |
| 10 | 0.62 | 1/2" | 1.00 |
| 15 | 1.40 | 5/8" | 1.56 |
| 20 | 2.48 | 3/4" | 2.25 |
| 25 | 3.90 | 1" | 4.03 |
| 30 | 5.55 | 1 1/4" | 6.30 |
| 40 | 9.90 | 1 1/2" | 9.08 |
| 50 | 15.40 | 2" | 16.10 |
Important: The inch sizes shown above are not correct metric conversions for the listed mm sizes (e.g., 1/4" = 6.35 mm, 1/2" = 12.7 mm). If you want engineering-correct inch↔mm alignment, use the reference table below.
G1) Inch ↔ mm Conversion Sanity Check (Engineering Reference)
| Inch Size | Exact mm (reference) |
|---|---|
| 1/8" | 3.175 |
| 1/4" | 6.35 |
| 1/2" | 12.70 |
| 5/8" | 15.875 |
| 3/4" | 19.05 |
| 1" | 25.40 |
| 1 1/4" | 31.75 |
| 1 1/2" | 38.10 |
| 2" | 50.80 |
H) Grade-wise Density & Weight Correction Factors
| Grade Family | Included Grades | Typical Density (g/cm³) | Weight Factor vs 304/316 |
|---|---|---|---|
| Austenitic | 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 | ≈ 7.93 | 1.000 (baseline) |
| Ferritic / Martensitic | 409L, 410, 410S, 420, 429, 430, 430Ti, 439, 441, 444 | ≈ 7.70 | 0.971 (≈ 7.70 / 7.93) |
| Duplex | S31803 (2205) | ≈ 7.80 | 0.984 (≈ 7.80 / 7.93) |
I) Grade-wise Weight (kg/m) — Quick Reference
Multiply the baseline weight (Austenitic 304/316) by the factor above to estimate Ferritic/Martensitic and Duplex weights.
| Size | Unit | Austenitic (304/316) | Ferritic/Martensitic (× 0.971) | Duplex S31803 (× 0.984) |
|---|---|---|---|---|
| 3 | mm | 0.06 | 0.058 | 0.059 |
| 5 | mm | 0.16 | 0.155 | 0.157 |
| 10 | mm | 0.62 | 0.602 | 0.610 |
| 15 | mm | 1.40 | 1.36 | 1.38 |
| 20 | mm | 2.48 | 2.41 | 2.44 |
| 25 | mm | 3.90 | 3.79 | 3.84 |
| 30 | mm | 5.55 | 5.39 | 5.46 |
| 40 | mm | 9.90 | 9.61 | 9.74 |
| 50 | mm | 15.40 | 14.95 | 15.15 |
| 1/8" | inch | 0.06 | 0.058 | 0.059 |
| 1/4" | inch | 0.25 | 0.243 | 0.246 |
| 1/2" | inch | 1.00 | 0.971 | 0.984 |
| 5/8" | inch | 1.56 | 1.52 | 1.53 |
| 3/4" | inch | 2.25 | 2.19 | 2.21 |
| 1" | inch | 4.03 | 3.91 | 3.96 |
| 1 1/4" | inch | 6.30 | 6.12 | 6.20 |
| 1 1/2" | inch | 9.08 | 8.81 | 8.93 |
| 2" | inch | 16.10 | 15.64 | 15.84 |
J) Shapes, Tolerances & Grades Covered
| Item | Details |
|---|---|
| Shapes | Round, Hexagonal, Square, Flat (bright / black / peeled / ground) |
| Tolerances | Typically h9–h11 for cold-drawn rounds (verify standard limits per size/finish: ASTM A276/A484, EN 10060/EN 10278, applicable JIS) |
| Grades Covered |
Austenitic: 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 Ferritic/Martensitic: 409L, 410, 410S, 420, 429, 430, 430Ti, 439, 441, 444 Duplex: S31803 (2205) |
| Formula (Round Bars) |
Weight (kg/m) = (π/4) × D² (mm²) × Density (g/cm³) × 10−6 Use density by grade family from Table B to compute grade-specific theoretical weights. |
