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Arsenic Brass Tubes (CuZnAs)
Product Overview
Arsenic Brass Tubes (CuZnAs) offered by R V Metal Corporation are high-performance brass tubes specifically engineered for demanding corrosive environments, particularly where resistance to dezincification is critical. The controlled addition of arsenic significantly enhances the alloy’s durability when exposed to aggressive waters, saline conditions, and fluctuating temperatures, making these tubes a preferred choice for marine, condenser, heat exchanger, and desalination applications. CuZnAs brass tubes combine excellent thermal conductivity with superior resistance to erosion, pitting, and stress corrosion cracking, ensuring long service life and consistent performance.
Manufactured to stringent international standards, our Arsenic Brass Tubes are supplied in precise dimensions, uniform wall thickness, and consistent metallurgical quality. They exhibit good formability, machinability, and brazing characteristics while maintaining structural integrity under continuous flow and pressure conditions. R V Metal Corporation supplies CuZnAs brass tubes to EPC contractors, OEMs, shipyards, and industrial users who require reliability, compliance, and long-term operational safety in critical heat-transfer and fluid-handling systems.
Technical Specifications
| Technical Specification – Arsenic Brass Tubes (CuZnAs) | |
|---|---|
| Product Name | Arsenic Brass Tubes (CuZnAs) |
| Manufacturer / Supplier | R V Metal Corporation |
| Material Type | Dezincification-Resistant Brass with Arsenic Addition |
| UNS Designation | C68700 / C68710 (Typical) |
| Copper Content (Cu) | Approx. 70% – 72% |
| Zinc Content (Zn) | Balance |
| Arsenic Content (As) | 0.02% – 0.06% (Controlled for Dezincification Resistance) |
| Manufacturing Process | Extruded / Drawn Seamless Tubes |
| Tube Form | Straight Lengths / Coils (as per requirement) |
| Temper Condition | Annealed (Soft) / Half-Hard / Hard Drawn |
| Outside Diameter Range | 6 mm to 150 mm (Custom sizes available) |
| Wall Thickness Range | 0.5 mm to 6.0 mm (or as specified) |
| Length | Standard 3 m, 4 m, 5 m, 6 m or Cut-to-Length |
| Surface Finish | Mill Finish / Bright Drawn / Polished |
| Corrosion Resistance | Excellent resistance to dezincification, erosion, and seawater corrosion |
| Operating Temperature | Suitable for continuous service up to ~300°C |
| Pressure Rating | As per diameter, wall thickness, and applicable standards |
| Standards Compliance | ASTM B111 / ASTM B171 / EN 12451 / BS 2871 / IS 410 |
| Typical Applications | Heat Exchangers, Condensers, Marine Systems, Desalination Plants, Power Plants |
| Quality Documentation | Mill Test Certificate (EN 10204 3.1), Chemical & Mechanical Test Reports |
Chemical Composition
| Chemical Composition of Arsenic Brass Tubes (CuZnAs) | ||
|---|---|---|
| Element | Symbol | Composition (% by Weight) |
| Copper | Cu | 70.0 – 72.0 |
| Zinc | Zn | Balance |
| Arsenic | As | 0.02 – 0.06 |
| Lead | Pb | ≤ 0.05 |
| Iron | Fe | ≤ 0.05 |
| Tin | Sn | ≤ 0.05 |
| Nickel | Ni | ≤ 0.05 |
| Other Impurities | — | ≤ 0.20 (Total) |
UNS Codes & Grades
| UNS Codes & Grades of Arsenic Brass Tubes (CuZnAs) | ||||
|---|---|---|---|---|
| Material Description | UNS No. | Common Grade Name | Primary Standard | Typical Applications |
| Arsenic Brass Tube | C68700 | Admiralty Arsenical Brass | ASTM B111 / ASME SB111 | Condensers, Heat Exchangers, Marine Cooling Systems |
| Arsenic Brass Tube | C68710 | Aluminium-Arsenic Brass Variant | ASTM B111 | Sea Water Condensers, Power Plant Heat Exchangers |
| Arsenic Brass Tube | C44300 | Admiralty Brass (Arsenical) | ASTM B111 / BS 2871 | Marine Boilers, Desalination Units, Cooling Towers |
| Arsenic Brass Tube | C44400 | Admiralty Brass – High Purity | EN 12451 / BS EN 12451 | Shipbuilding, Offshore Heat Transfer Equipment |
| Arsenic Brass Tube | CB102 | Admiralty Brass | BS 2871 Part 2 | Condensers, Heat Exchangers, Marine Service |
Mechanical, Physical & Fabrication Properties
| Mechanical, Physical & Fabrication Properties of Arsenic Brass Tubes (CuZnAs) | |||
|---|---|---|---|
| Property | Typical Value | Unit | Remarks / Engineering Significance |
| Tensile Strength | 350 – 480 | MPa | Provides adequate strength for pressure-bearing condenser and heat exchanger tubes |
| Yield Strength (0.2% Proof) | 120 – 200 | MPa | Ensures dimensional stability under continuous service loads |
| Elongation | 25 – 35 | % | Excellent ductility for tube expansion and bending operations |
| Hardness | 70 – 110 | HB | Balance between strength and formability depending on temper |
| Density | 8.4 – 8.6 | g/cm³ | Slightly lower than pure copper due to zinc content |
| Melting Range | 900 – 940 | °C | Suitable for brazing and soldering without distortion |
| Thermal Conductivity | 110 – 130 | W/m·K | Efficient heat transfer for condensers and coolers |
| Electrical Conductivity | 25 – 28 | % IACS | Not intended for electrical use; optimized for thermal performance |
| Coefficient of Thermal Expansion | 20 – 21 | µm/m·K | Stable under temperature cycling in marine environments |
| Formability | Excellent | — | Suitable for bending, rolling, and tube drawing |
| Brazability | Very Good | — | Compatible with standard copper and silver brazing alloys |
| Machinability | Good | — | Better than pure copper; clean chip formation |
| Weldability | Limited | — | Brazing preferred over fusion welding |
| Dezincification Resistance | Excellent | — | Arsenic addition inhibits zinc leaching in seawater |
| Corrosion Resistance | Excellent (Marine) | — | Ideal for seawater, brackish water, and polluted cooling media |
Common Names & International Identifiers
| Common Names & International Identifiers of Arsenic Brass Tubes (CuZnAs) | |||
|---|---|---|---|
| Identifier Type | Designation / Name | Standard / Region | Remarks / Industry Usage |
| Common Industry Name | Arsenical Brass Tube | Global | Widely used term in marine, condenser, and heat exchanger industries |
| Metallurgical Name | Cu-Zn-As Alloy | International | Indicates brass alloy with controlled arsenic addition for dezincification resistance |
| DIN / EN Designation | CuZn36As | EN / DIN (Europe) | Standard arsenic brass grade for seawater and condenser tubes |
| ASTM / UNS | C68700 | ASTM B111 / UNS (USA) | Arsenical brass alloy specified for condenser and heat exchanger tubes |
| BS Designation | CZ126 | BS 2871 (UK) | Traditional British grade for marine and desalination service |
| IS Designation | CuZn36As | IS 407 / IS 410 (India) | Used for condenser and heat exchanger tubes in Indian standards |
| JIS Designation | C6871 | JIS H3300 (Japan) | Japanese equivalent for arsenic brass tubing applications |
| Marine Industry Term | Dezincification-Resistant Brass Tube (DZR) | Global Marine Sector | Refers to arsenic-bearing brass with high resistance to dezincification |
| Heat Exchanger Grade | Condenser Brass Tube | Power & Process Industry | Generic descriptor for CuZnAs tubes used in condensers |
| Trade / Commercial Name | Arsenic Brass Condenser Tube | Commercial | Used by OEMs and EPCs in tenders and procurement documents |
Standards & International Equivalents
| Standards & International Equivalents of Arsenic Brass Tubes (CuZnAs) | |||
|---|---|---|---|
| Standard Body | Standard Number | Equivalent Grade / Designation | Typical Application / Notes |
| ASTM / UNS | ASTM B111 / B111M | C68700 | Condenser and heat exchanger tubes with high resistance to dezincification |
| EN (Europe) | EN 12451 | CuZn36As | Seawater, marine, and industrial heat exchanger tubing |
| DIN (Germany) | DIN 17660 / DIN EN 12451 | CuZn36As | Dezincification-resistant brass for condenser service |
| BS (United Kingdom) | BS 2871 Part 2 | CZ126 | Traditional admiralty/arsenical brass tube standard |
| IS (India) | IS 407 | CuZn36As | Condenser and heat exchanger tubes for power & process plants |
| JIS (Japan) | JIS H3300 | C6871 | Japanese equivalent for arsenic brass tubing |
| ISO | ISO 431 | CuZn36As | International reference for brass tubes in heat exchange applications |
| ASME | ASME SB-111 | C68700 | Boiler and pressure equipment tubing applications |
| Marine / Naval Specs | DEF STAN / Naval Specs | Arsenical Brass Tube | Used in shipboard condensers and desalination plants |
| OEM / EPC Reference | Project Specifications | CuZn36As / C68700 | Commonly specified in power, refinery, and offshore EPC tenders |
Applications
| Applications of Arsenic Brass Tubes (CuZnAs) | ||
|---|---|---|
| Industry / Sector | Application Area | Technical Reason for Use |
| Power Generation | Steam Condenser Tubes | High resistance to dezincification and erosion in cooling water systems |
| Thermal & Nuclear Power Plants | Heat Exchangers & Condensers | Stable mechanical properties at elevated temperatures and pressures |
| Marine & Shipbuilding | Seawater Condensers | Excellent corrosion resistance in seawater due to arsenic addition |
| Offshore Platforms | Cooling Water Systems | Superior resistance to biofouling and saline corrosion |
| Oil & Gas | Refinery Heat Exchangers | Long service life in aggressive process and cooling fluids |
| Petrochemical Plants | Process Cooling & Condensing Units | Resistance to dezincification and stress corrosion cracking |
| Sugar Industry | Evaporators & Juice Heaters | Good thermal conductivity with corrosion resistance in acidic media |
| Desalination Plants | Brine & Heat Recovery Units | Performs reliably in high-chloride environments |
| Fertilizer Industry | Process Heat Exchangers | Durability under chemically aggressive operating conditions |
| HVAC & Industrial Cooling | Chillers & Condenser Coils | High heat transfer efficiency combined with corrosion resistance |
| Water Treatment Plants | Cooling & Heat Exchange Systems | Prevents premature failure due to dezincification |
| EPC & OEM Projects | Custom Condenser & Heat Exchanger Assemblies | Meets stringent international specifications and long-life expectations |
Standard Arsenic Brass Tubes Dimensional Chart
| Arsenic Brass Tubes (CuZnAs) – Standard Dimensional & Theoretical Weight Chart | |||||
|---|---|---|---|---|---|
| Nominal OD (inch) |
Outside Diameter (mm) |
Wall Thickness (mm) |
Inside Diameter (mm) |
Theoretical Weight (kg/m) |
Typical Application |
| 1/2" | 12.70 | 1.00 | 10.70 | 0.31 | Heat Exchangers / Condensers |
| 5/8" | 15.88 | 1.20 | 13.48 | 0.46 | Marine Cooling Systems |
| 3/4" | 19.05 | 1.25 | 16.55 | 0.60 | Power Plant Condensers |
| 7/8" | 22.23 | 1.50 | 19.23 | 0.83 | Seawater Heat Exchangers |
| 1" | 25.40 | 1.65 | 22.10 | 1.07 | Oil & Gas Cooling Systems |
| 1 1/4" | 31.75 | 2.00 | 27.75 | 1.62 | Refinery Condensers |
| 1 1/2" | 38.10 | 2.20 | 33.70 | 2.18 | Desalination Plants |
| 2" | 50.80 | 2.50 | 45.80 | 3.52 | Large Industrial Heat Exchangers |
| Arsenic Brass Tubes (CuZnAs) – Available Forms & Supply Conditions | ||||
|---|---|---|---|---|
| Supply Form | Typical Length / Packing | End Finish | Temper / Condition | Notes |
| Straight Length Tubes | 3m / 4m / 5m / 6m (bundles) | Plain / Square cut / Deburred | Annealed (O) / Half Hard / Hard Drawn (H) | Most common for condensers & heat exchangers. |
| Coils (where applicable) | Coiled (custom OD/WT limits) | Sealed ends on request | Annealed (O) | Usually limited to smaller OD & thinner wall. |
| U-Bend Tubes | As per drawing | Plain / Machined ends | Annealed (post-bend) / As specified | For shell & tube heat exchangers. |
| Finned Tubes (optional) | As per fin spec | Plain / Expanded fit | As specified | Mechanical/embedded fins possible depending on application. |
| Cut-to-Length | Custom lengths (± tolerance as specified) | Chamfered / Deburred | As specified | For tube-sheet drilling patterns and fabrication speed. |
| Special Ends | As per requirement | Grooved / Beaded / Expanded ends | As specified | For specific OEM jointing systems. |
| Arsenic Brass Tubes (CuZnAs) – Standard Size Range (OD / WT) & Theoretical Weight | ||||||
|---|---|---|---|---|---|---|
| OD (inch) | OD (mm) | Wall (mm) | ID (mm) | Theoretical Weight (kg/m) | Typical Length | Typical Use |
| 3/8" | 9.52 | 0.80 | 7.92 | 0.19 | 3–6m | Small coolers / instruments |
| 1/2" | 12.70 | 1.00 | 10.70 | 0.31 | 3–6m | Heat exchangers |
| 5/8" | 15.88 | 1.20 | 13.48 | 0.46 | 3–6m | Marine coolers |
| 3/4" | 19.05 | 1.25 | 16.55 | 0.60 | 3–6m | Condensers |
| 7/8" | 22.23 | 1.50 | 19.23 | 0.83 | 3–6m | Seawater service |
| 1" | 25.40 | 1.65 | 22.10 | 1.07 | 3–6m | Refinery exchangers |
| 1 1/8" | 28.58 | 1.65 | 25.28 | 1.21 | 3–6m | Heat exchanger bundles |
| 1 1/4" | 31.75 | 2.00 | 27.75 | 1.62 | 3–6m | Condensers |
| 1 1/2" | 38.10 | 2.20 | 33.70 | 2.18 | 3–6m | Desalination |
| 2" | 50.80 | 2.50 | 45.80 | 3.52 | 3–6m | Large exchangers |
