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DZR Brass Tubes (Dezincification Resistant Brass)
Product Overview
DZR Brass Tubes (Dezincification Resistant Brass) are engineered for long-life performance in potable water, hot water, and mildly aggressive water chemistries where conventional brass can suffer selective zinc leaching (dezincification), leading to porous structure, leaks, and premature failures. R V Metal Corporation supplies DZR brass tubes with controlled chemistry and heat-treatment to enhance resistance in chloride-bearing waters, elevated temperatures, and stagnation conditions commonly seen in plumbing networks, water heaters, manifolds, valves, and marine/utility installations. These tubes offer a balanced combination of corrosion resistance, strength, and excellent machinability—making them a preferred choice for OEMs and contractors seeking safer, regulation-friendly brass for critical water-contact applications.
Technical Specifications
| Technical Specification – DZR Brass Tubes (Dezincification Resistant Brass) | |
|---|---|
| Product Name | DZR Brass Tubes (Dezincification Resistant Brass) |
| Base Material | Copper-Zinc Brass Alloy with Controlled Arsenic / Tin Additions |
| Primary Grade | CZ132 / CW602N / UNS C69300 (Typical) |
| Manufacturing Process | Extruded / Drawn Seamless Tubes |
| Form Supplied | Straight Lengths, Cut-to-Length, Custom Sections |
| Temper Condition | Annealed (Soft), Half-Hard, Hard Drawn |
| Outside Diameter Range | 6 mm to 150 mm (or equivalent inch sizes) |
| Wall Thickness Range | 0.8 mm to 10 mm (Custom on Request) |
| Standard Lengths | 3 m, 4 m, 5 m, 6 m (Custom Lengths Available) |
| Surface Finish | Mill Finish, Bright Drawn, Polished |
| Dezincification Resistance | Complies with ISO 6509 / EN 15664 Requirements |
| Pressure Rating | Suitable for High-Pressure Water & Plumbing Systems (Design-Dependent) |
| Temperature Range | -50°C to +200°C (Application Dependent) |
| Corrosion Resistance | Excellent Resistance to Dezincification, Chloride & Hot Water Attack |
| Machinability | Good to Excellent (Optimized for Valve & Fitting Manufacturing) |
| Weldability / Brazability | Good (Standard Brazing & Joining Methods) |
| Compliance | Lead-Free / Low-Lead Options Available for Potable Water Use |
| Inspection & Testing | Dimensional Check, Chemical Analysis, Eddy Current Test, Hydro Test (Optional) |
| Standards Followed | EN, ASTM, ISO, BS (As per Customer / Project Requirement) |
| Typical Applications | Potable Water Plumbing, Valves, Faucets, Manifolds, Marine & Utility Systems |
Chemical Composition
| Chemical Composition – DZR Brass Tubes (Dezincification Resistant Brass) | ||
|---|---|---|
| Element | Symbol | Typical Composition (%) |
| Copper | Cu | 60.0 – 63.0 |
| Zinc | Zn | Balance |
| Arsenic | As | 0.02 – 0.15 |
| Lead | Pb | ≤ 0.20 (≤ 0.10 for Low-Lead / Lead-Free Grades) |
| Iron | Fe | ≤ 0.20 |
| Tin | Sn | ≤ 0.10 |
| Nickel | Ni | ≤ 0.30 |
| Aluminium | Al | ≤ 0.05 |
| Other Impurities | — | ≤ 0.10 (Total) |
Note: Arsenic is intentionally added to DZR brass to inhibit selective zinc leaching
(dezincification) in hot water, potable water, and aggressive service environments.
Actual composition may vary slightly depending on standards such as EN CW602N / CZ132 or UNS C69300.
UNS Codes & Grades
| UNS Codes & Grades – DZR Brass Tubes (Dezincification Resistant Brass) | ||||
|---|---|---|---|---|
| Standard / Region | UNS / EN Code | Common Grade Name | Typical Composition (Cu / Zn / As) | Remarks & Applications |
| ASTM / UNS | C69300 | DZR Brass | Cu ~60–63% / Zn Balance / As 0.02–0.15% | Most widely used DZR grade; potable water, plumbing, valves, fittings |
| ASTM / UNS | C68700 | Arsenical Brass (DZR) | Cu ~62% / Zn Balance / As controlled | Good dezincification resistance; marine & hot water systems |
| EN (Europe) | CW602N | CZ132 | Cu 60–63% / Zn Balance / As 0.02–0.15% | EN standard DZR brass; widely specified for potable water in EU |
| EN (Europe) | CW625N | DZR Brass (Low Lead) | Cu ~61% / Zn Balance / As + reduced Pb | Low-lead / lead-free compliant; drinking water & green building norms |
| IS (India) | IS 319 (Type DZR) | DZR Brass | As per EN CW602N equivalent | Indian standard for plumbing, sanitary and industrial brass tubes |
| BS (UK) | BS 2874 CZ132 | DZR Brass | Cu ~60–63% / Zn Balance / As added | Traditional UK DZR grade for water services |
Technician Note: Only certified DZR grades (UNS C69300 / EN CW602N or equivalent)
should be used for hot potable water and aggressive chloride environments.
Standard brass grades without arsenic are prone to dezincification and premature failure.
Mechanical, Physical & Fabrication Properties
| Mechanical, Physical & Fabrication Properties – DZR Brass Tubes (Dezincification Resistant Brass) | |||
|---|---|---|---|
| Property Category | Property | Typical Value | Remarks / Engineering Significance |
| Mechanical Properties | Tensile Strength | 360 – 500 MPa | High strength suitable for pressurized plumbing and fittings |
| Yield Strength (0.2% Proof) | 150 – 250 MPa | Ensures dimensional stability under continuous load | |
| Elongation | 15 – 30 % | Good ductility for bending and forming operations | |
| Hardness | 80 – 130 HB | Depends on temper (annealed / half-hard / hard-drawn) | |
| Impact Resistance | Good | Resists cracking under mechanical shock | |
| Physical Properties | Density | ≈ 8.4 – 8.5 g/cm³ | Slightly lower than pure copper due to zinc content |
| Melting Range | 900 – 940 °C | Suitable for brazing and soldering processes | |
| Thermal Conductivity | 110 – 130 W/m·K | Lower than copper but adequate for plumbing and heat transfer | |
| Electrical Conductivity | 25 – 28 % IACS | Not intended for high-current electrical applications | |
| Coefficient of Thermal Expansion | ≈ 20 × 10⁻⁶ /°C | Stable under temperature cycling | |
| Corrosion Resistance | Excellent | Resistant to dezincification, chlorides and hot water | |
| Fabrication Properties | Formability | Very Good | Suitable for cold bending, swaging and expansion |
| Machinability | Good | Clean machining with proper tooling | |
| Brazing / Soldering | Excellent | Compatible with silver brazing & soft solder alloys | |
| Weldability | Limited | Not commonly welded; brazing preferred | |
| Stress Corrosion Cracking Resistance | Excellent | Arsenic addition suppresses dezincification attack | |
| Suitability for Potable Water | Approved | Meets global drinking water standards when certified | |
Common Names & International Identifiers
| Common Names & International Identifiers – DZR Brass Tubes (Dezincification Resistant Brass) | |||
|---|---|---|---|
| Category | Standard / Region | Grade / Designation | Common Industry Name |
| Generic / International | Global | DZR Brass | Dezincification Resistant Brass |
| Global | CuZn36Pb2As / CuZn37As | DZR Plumbing Brass | |
| Global | Low-Lead DZR Brass | Lead-Controlled DZR Brass | |
| ASTM / UNS | UNS | C35200 | DZR Brass (Arsenic Bearing) |
| UNS | C35300 | DZR Forging / Tube Brass | |
| ASTM | B455 / B687 | DZR Brass Tube & Pipe | |
| European (EN) | EN 12164 | CW602N | DZR Brass – Free Cutting |
| EN 12165 | CW602N | DZR Brass – Forging | |
| EN 12167 | CW602N | DZR Brass – Extruded | |
| EN ISO | CuZn36Pb2As | DZR Plumbing Brass | |
| British (BS) | BS EN | CW602N | DZR Brass Tube |
| BS 2872 | CZ132 | Dezincification Resistant Brass | |
| German (DIN) | DIN EN | CuZn36Pb2As | DZR Brass |
| DIN | 2.0380 | DZR Plumbing Brass | |
| Indian (IS) | IS 319 | Grade 2 / DZR Variant | DZR Brass for Plumbing |
| IS / ISO | CuZn36Pb2As | Dezincification Resistant Brass | |
| Application-Based Names | Plumbing Industry | - | Hot Water Brass |
| Water Supply | - | Anti-Dezincification Brass | |
| HVAC / Sanitary | - | DZR Sanitary Brass Tubes | |
Standards & International Equivalents
| Standards & International Equivalents – DZR Brass Tubes (Dezincification Resistant Brass) | ||||
|---|---|---|---|---|
| Region / Country | Standard | Grade / Designation | Material Description | Equivalent / Notes |
| International | ISO | CuZn36Pb2As | DZR Brass | Globally accepted DZR composition |
| USA | UNS | C35200 | DZR Brass Tube | Arsenic-bearing dezincification resistant brass |
| UNS | C35300 | DZR Brass (Low Lead) | Improved corrosion resistance | |
| ASTM | B455 / B687 | DZR Brass Tubes & Pipes | Plumbing & water service use | |
| Europe (EN) | EN 12164 | CW602N | DZR Brass – Free Cutting | Machining applications |
| EN 12165 | CW602N | DZR Brass – Forging | Forged components | |
| EN 12167 | CW602N | DZR Brass – Extruded | Tubes, rods & sections | |
| EN ISO | CuZn36Pb2As | DZR Plumbing Brass | Hot & cold water systems | |
| United Kingdom | BS EN | CW602N | DZR Brass Tube | European harmonized standard |
| BS 2872 | CZ132 | DZR Brass | Legacy British designation | |
| Germany | DIN EN | CuZn36Pb2As | DZR Brass | Equivalent to CW602N |
| DIN | 2.0380 | DZR Brass Alloy | High corrosion resistance | |
| India | IS 319 | Grade 2 (DZR Variant) | DZR Brass | Plumbing & sanitary fittings |
| IS / ISO | CuZn36Pb2As | DZR Brass Tube | Internationally aligned composition | |
| Australia | AS 2345 | DZR Brass | Dezincification Resistant Brass | Water & plumbing compliance |
| Water Regulations | WRAS / ACS | - | DZR Brass Approved | Potable water contact certified |
Applications
| Applications of DZR Brass Tubes (Dezincification Resistant Brass) | |||
|---|---|---|---|
| Industry / Sector | Application Area | Why DZR Brass is Used | Typical Service Conditions |
| Plumbing & Sanitary | Hot & Cold Water Pipes, Fittings, Connectors | Resists dezincification in aggressive and stagnant water | Potable water, varying pH, high chloride content |
| Municipal Water Supply | Distribution Lines, Valve Bodies, Couplings | Long-term corrosion resistance and compliance with water norms | Continuous water flow, underground installations |
| HVAC Systems | Water Circulation Tubes, Heat Exchanger Connections | Maintains strength and integrity under thermal cycling | Hot water, chilled water, pressure fluctuations |
| Marine & Coastal Installations | Seawater Lines, Deck Plumbing, Condenser Tubes | High resistance to saltwater-induced dezincification | Saline water, humid and corrosive environments |
| Industrial Process Plants | Water Handling, Chemical Dosing Lines | Stable microstructure prevents selective zinc loss | Process water, mildly corrosive fluids |
| Oil & Gas Utilities | Utility Water Lines, Instrument Cooling Tubes | Reliable performance under pressure and temperature variation | Pressurized water, offshore conditions |
| Fire Protection Systems | Sprinkler Lines, Fire Water Distribution | Prevents internal corrosion during long idle periods | Stagnant water, intermittent flow |
| Solar Water Heating | Hot Water Transfer Tubes | Excellent resistance to hot, oxygenated water | High temperature potable water |
| Building Services | Risers, Manifolds, Water Distribution Networks | Extended service life compared to standard brass | Residential & commercial plumbing systems |
| OEM Plumbing Components | Machined Tube Parts, Inserts, Bushes | Good machinability with superior corrosion resistance | Precision-engineered plumbing assemblies |
Standard Dezincification Resistant Brass Tubes Dimensional Chart
| Dezincification Resistant (DZR) Brass Tubes – Dimensional & Theoretical Weight Chart | |||||
|---|---|---|---|---|---|
| Nominal Size | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Theoretical Weight | Standard Length |
| 1/4" | 6.35 mm | 0.8 mm | 4.75 mm | 0.13 kg/m | 3 / 6 m |
| 3/8" | 9.53 mm | 1.0 mm | 7.53 mm | 0.26 kg/m | 3 / 6 m |
| 1/2" | 12.70 mm | 1.2 mm | 10.30 mm | 0.41 kg/m | 3 / 6 m |
| 3/4" | 19.05 mm | 1.5 mm | 16.05 mm | 0.82 kg/m | 3 / 6 m |
| 1" | 25.40 mm | 2.0 mm | 21.40 mm | 1.55 kg/m | 3 / 6 m |
| 1 1/4" | 31.75 mm | 2.5 mm | 26.75 mm | 2.40 kg/m | 3 / 6 m |
| 1 1/2" | 38.10 mm | 3.0 mm | 32.10 mm | 3.45 kg/m | 3 / 6 m |
| 2" | 50.80 mm | 3.5 mm | 43.80 mm | 5.85 kg/m | 3 / 6 m |
Notes:
• Theoretical weights are calculated based on DZR brass density (~8.4 g/cm³).
• Dimensions comply with EN 12164 / EN 12165 / EN 12168 for DZR alloys (CW602N / CZ132).
• Custom wall thicknesses, tighter tolerances, and cut-to-length options available on request.
• Suitable for potable water, marine, plumbing, HVAC, and high-chloride environments.
• Theoretical weights are calculated based on DZR brass density (~8.4 g/cm³).
• Dimensions comply with EN 12164 / EN 12165 / EN 12168 for DZR alloys (CW602N / CZ132).
• Custom wall thicknesses, tighter tolerances, and cut-to-length options available on request.
• Suitable for potable water, marine, plumbing, HVAC, and high-chloride environments.
| CW602N vs CW626N – Dezincification Resistant Brass Comparison | ||
|---|---|---|
| Parameter | CW602N | CW626N |
| EN Designation | CW602N | CW626N |
| Common Name | DZR Brass (Standard) | Enhanced DZR Brass |
| Approx. Composition | Cu ~62%, Zn ~36%, As 0.02–0.15% | Cu ~61–63%, Zn ~35–37%, As + Sn additions |
| Primary Alloying Additive | Arsenic (As) | Arsenic + Tin (Sn) |
| Resistance to Dezincification | Very Good | Excellent (Superior) |
| Resistance to Stress Corrosion Cracking | Good | Very High |
| Chloride Water Resistance | Good | Excellent |
| Typical Applications | Plumbing fittings, valves, pipework | Marine systems, desalination, aggressive water |
| Potable Water Suitability | Yes (EN potable compliant) | Yes (Preferred for harsh water) |
| Machinability | Good | Moderate |
| Cold Formability | Good | Moderate |
| Hot Workability | Good | Good |
| Relative Cost | Lower | Higher (Premium grade) |
| Recommended Service Environment | Normal to moderately aggressive water | High-chloride, marine & coastal environments |
Engineering Note:
CW602N is the industry workhorse DZR brass and is adequate for most potable water and plumbing applications. CW626N is specified where water chemistry is aggressive, chloride levels are high, or long service life under thermal and pressure cycling is critical.
CW602N is the industry workhorse DZR brass and is adequate for most potable water and plumbing applications. CW626N is specified where water chemistry is aggressive, chloride levels are high, or long service life under thermal and pressure cycling is critical.
