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Cartridge Brass Pipe 70/30 (CuZn30)
Product Overview
Cartridge Brass Pipe 70/30 (CuZn30) is a high-quality alpha brass alloy consisting of approximately 70% copper and 30% zinc, specifically engineered for applications requiring excellent cold-forming capability, uniform metallurgical structure, and reliable mechanical performance. The alloy’s single-phase alpha structure delivers superior ductility, making it ideal for deep drawing, bending, flaring, and precision forming operations without the risk of cracking or stress failure.
R V Metal Corporation manufactures Cartridge Brass Pipes using controlled extrusion and drawing processes to ensure consistent wall thickness, smooth internal surfaces, and tight dimensional tolerances. The material exhibits good corrosion resistance in atmospheric, water, and mild industrial environments, along with stable electrical and thermal conductivity characteristics, making it suitable for both mechanical and electrical applications.
Cartridge Brass Pipe 70/30 is widely used in ammunition components, condenser and heat exchanger tubes, radiator systems, automotive and electrical fittings, decorative hardware, and general engineering parts. Pipes are supplied in annealed or hard-drawn condition, straight lengths or coils, and can be customized to meet OEM, EPC, and international standard requirements.
Technical Specifications
| Technical Specification – Cartridge Brass Pipe 70/30 (CuZn30) | |
|---|---|
| Material Grade | Cartridge Brass 70/30 (CuZn30) |
| Copper (Cu) | 69.0 – 71.0 % |
| Zinc (Zn) | Balance |
| UNS Designation | C26000 |
| EN / DIN Grade | CW505L / CuZn30 |
| IS Standard | IS 407 (CuZn30) |
| Manufacturing Process | Hot Extruded / Cold Drawn |
| Form Supplied | Straight Lengths / Coils |
| Temper Condition | Annealed (O), Half Hard (H), Hard Drawn (H80) |
| Outside Diameter Range | 6 mm to 150 mm (custom sizes available) |
| Wall Thickness Range | 0.5 mm to 12 mm |
| Length | Standard 3 m / 5 m / 6 m or as per customer requirement |
| Surface Finish | Bright Drawn / Mill Finish / Polished |
| Dimensional Tolerance | As per ASTM / EN / IS standards or customer specification |
| Operating Temperature | -50°C to +250°C |
| Corrosion Resistance | Good resistance to atmospheric, water, and mild industrial environments |
| Formability | Excellent – suitable for bending, flaring, deep drawing |
| Typical Applications | Ammunition components, heat exchangers, radiators, automotive parts, electrical fittings |
| Quality Certification | Mill Test Certificate (EN 10204 3.1), Chemical & Mechanical Test Reports |
Chemical Composition
| Chemical Composition – Cartridge Brass Pipe 70/30 (CuZn30) | ||
|---|---|---|
| Element | Symbol | Composition (% by Weight) |
| Copper | Cu | 69.0 – 71.0 |
| Zinc | Zn | Balance |
| Lead | Pb | ≤ 0.05 |
| Iron | Fe | ≤ 0.05 |
| Tin | Sn | ≤ 0.02 |
| Nickel | Ni | ≤ 0.02 |
| Other Impurities (Total) | — | ≤ 0.10 |
UNS Codes & Grades
| UNS Codes & Grades – Cartridge Brass Pipe 70/30 (CuZn30) | |||
|---|---|---|---|
| UNS Designation | Common Name | European / International Designation | Applicable Standards |
| C26000 | Cartridge Brass 70/30 | CuZn30 / CW505L | ASTM B36, ASTM B135, ASTM B587 |
| — | High Copper Brass | EN 1652 – CW505L | EN 1652, EN 12449, EN 12451 |
| — | Cartridge Brass Tube | IS 407 CuZn30 | IS 407 (India) |
| — | Cartridge Brass | JIS C2600 | JIS H3300 / JIS H3250 |
| — | Cartridge Brass | DIN CuZn30 | DIN 17660 / DIN EN Standards |
Mechanical, Physical & Fabrication Properties
| Mechanical, Physical & Fabrication Properties of Cartridge Brass Pipe 70/30 (CuZn30) | |||
|---|---|---|---|
| Property | Annealed (Soft) | Half-Hard | Hard / Drawn |
| Tensile Strength | 300 – 380 MPa | 380 – 450 MPa | 450 – 520 MPa |
| Yield Strength (0.2% Offset) | 90 – 120 MPa | 180 – 240 MPa | 260 – 320 MPa |
| Elongation (%) | 35 – 45% | 20 – 30% | 8 – 15% |
| Hardness | 60 – 80 HV | 90 – 120 HV | 130 – 160 HV |
| Density | 8.53 – 8.56 g/cm³ | ||
| Melting Range | 900 – 940 °C | ||
| Thermal Conductivity | 120 – 130 W/m·K | ||
| Electrical Conductivity | 26 – 28 % IACS | ||
| Formability | Excellent (Deep Drawing) | Good | Limited |
| Cold Workability | Excellent | Very Good | Moderate |
| Hot Workability | Good | ||
| Machinability | Fair (Better than pure copper) | ||
| Brazing & Soldering | Excellent | ||
| Weldability | Good (TIG / MIG with care) | ||
| Corrosion Resistance | Good in freshwater, atmosphere & mild industrial environments | ||
| Dezincification Resistance | Good (Low Zn content) | ||
Common Names & International Identifiers
| Common Names & International Identifiers of Cartridge Brass Pipe 70/30 (CuZn30) | ||
|---|---|---|
| Region / Standard | Designation / Code | Commonly Used Name |
| ASTM / UNS (USA) | C26000 | Cartridge Brass |
| EN (Europe) | CuZn30 (CW505L) | Cartridge Brass |
| DIN (Germany) | CuZn30 | Cartridge Brass |
| JIS (Japan) | C2600 | Cartridge Brass |
| IS (India) | CuZn30 / IS 319 Type 1 | Cartridge Brass |
| BS (United Kingdom) | CZ106 | Cartridge Brass |
| ISO | CuZn30 | Cartridge Brass Alloy |
| AFNOR (France) | CuZn30 | Laiton Cartouche |
| Common Trade Name | 70/30 Brass | Deep Drawing Brass |
| Industry Usage Name | α-Brass (Alpha Brass) | Single-Phase Brass Alloy |
Standards & International Equivalents
| Standards & International Equivalents of Cartridge Brass Pipe 70/30 (CuZn30) | |||
|---|---|---|---|
| Country / Region | Standard | Grade / Designation | Equivalent Alloy |
| USA | ASTM B135 / ASTM B36 | UNS C26000 | Cartridge Brass 70/30 |
| Europe | EN 12164 / EN 12168 / EN 12449 | CW505L | CuZn30 |
| Germany | DIN 17660 / DIN EN 12164 | CuZn30 | Cartridge Brass |
| United Kingdom | BS EN 12164 / BS 2874 | CZ106 | Cartridge Brass |
| India | IS 319 : 2007 | Type 1 (CuZn30) | Cartridge Brass |
| Japan | JIS H3300 | C2600 | Cartridge Brass |
| International | ISO 426-1 / ISO 431 | CuZn30 | Alpha Brass Alloy |
| France | AFNOR NF A51-102 | CuZn30 | Laiton Cartouche |
| China | GB/T 5231 | H70 | Cartridge Brass |
Applications
| Applications of Cartridge Brass Pipe 70/30 (CuZn30) | ||
|---|---|---|
| Industry / Sector | Application | Why CuZn30 is Used |
| Ammunition & Defense | Cartridge cases, shell bodies, primer cups | Excellent deep-drawability, high ductility, crack resistance |
| Automotive | Fuel lines, sensor sleeves, bushings | Good corrosion resistance, formability, vibration tolerance |
| HVAC & Refrigeration | Control tubing, connector pipes, fittings blanks | Easy bending, stable dimensions, leak-free forming |
| Plumbing & Sanitary | Valve bodies, sleeves, connector pipes | Excellent machinability and resistance to stress cracking |
| Electrical & Electronics | Terminal sleeves, connector housings | Good electrical conductivity with superior formability |
| Heat Exchangers | Low-pressure condenser and cooling tubes | Thermal conductivity and resistance to dezincification |
| Furniture & Decorative | Architectural tubes, trims, lamp components | Smooth surface finish, uniform golden appearance |
| Industrial Engineering | Deep-drawn parts, formed sleeves, structural tubing | Single-phase alpha brass – ideal for cold working |
| Marine (Non-Seawater) | Cabin hardware, fittings, low-exposure tubing | Moderate corrosion resistance in controlled environments |
| OEM Fabrication | Custom drawn pipes and precision components | Predictable forming behavior and consistent metallurgy |
Standard Cartridge Brass Pipe 70/30 (CuZn30) Dimensional Chart
| Cartridge Brass Pipe 70/30 (CuZn30) – Standard Dimensional & Theoretical Weight Chart | |||||||
|---|---|---|---|---|---|---|---|
| Nominal Size | OD (mm) | Wall (mm) | ID (mm) | Area (mm²) | Theoretical Weight (kg/m) | Available Form | Typical Temper |
| 6 mm | 6.00 | 0.50 | 5.00 | 8.64 | 0.074 | Straight / Coil | O (Annealed) / H (Hard) |
| 8 mm | 8.00 | 0.60 | 6.80 | 13.96 | 0.119 | Straight / Coil | O / H |
| 10 mm | 10.00 | 0.70 | 8.60 | 20.45 | 0.175 | Straight / Coil | O / H |
| 12 mm | 12.00 | 0.80 | 10.40 | 28.14 | 0.241 | Straight / Coil | O / H |
| 15 mm | 15.00 | 1.00 | 13.00 | 43.98 | 0.376 | Straight | O / H |
| 16 mm | 16.00 | 1.00 | 14.00 | 47.12 | 0.403 | Straight | O / H |
| 18 mm | 18.00 | 1.20 | 15.60 | 63.34 | 0.542 | Straight | O / H |
| 20 mm | 20.00 | 1.20 | 17.60 | 70.37 | 0.602 | Straight | O / H |
| 22 mm | 22.00 | 1.50 | 19.00 | 96.82 | 0.829 | Straight | O / H |
| 25 mm | 25.00 | 1.50 | 22.00 | 110.45 | 0.946 | Straight | O / H |
| 28 mm | 28.00 | 1.80 | 24.40 | 147.28 | 1.261 | Straight | O / H |
| 32 mm | 32.00 | 2.00 | 28.00 | 188.50 | 1.614 | Straight | O / H |
| 35 mm | 35.00 | 2.00 | 31.00 | 207.35 | 1.776 | Straight | O / H |
| 38 mm | 38.00 | 2.00 | 34.00 | 226.19 | 1.937 | Straight | O / H |
| 42 mm | 42.00 | 2.50 | 37.00 | 310.06 | 2.655 | Straight | O / H |
| 50 mm | 50.00 | 3.00 | 44.00 | 443.99 | 3.801 | Straight | O / H |
Note: Theoretical weights are indicative and calculated using a typical Cartridge Brass (CuZn30) density of ~8.50 g/cm³. Final weights may vary based on chemical composition limits, tolerance, and temper (annealed/hard-drawn). For EPC/OEM procurement, always confirm OD/ID tolerances, straightness, and length/coil packing before ordering.
| Pressure Rating vs Wall Thickness – Cartridge Brass Pipe (CuZn30) | ||||
|---|---|---|---|---|
| OD (mm) | Wall (mm) | Allowable Working Pressure (bar) | Test Pressure (bar) | Application Class |
| 10 | 0.7 | 70 | 105 | Low pressure instrumentation |
| 12 | 0.8 | 85 | 128 | Fluid transfer lines |
| 15 | 1.0 | 100 | 150 | Hydraulic / Pneumatic |
| 18 | 1.2 | 115 | 173 | Industrial utilities |
| 22 | 1.5 | 135 | 203 | Heat exchangers |
| 28 | 1.8 | 155 | 233 | Marine & process lines |
| 35 | 2.0 | 170 | 255 | Heavy industrial |
| Annealed (O) vs Hard-Drawn (H) – Cartridge Brass Pipes | |||
|---|---|---|---|
| Property | Annealed (O) | Hard-Drawn (H) | Use Case |
| Tensile Strength | 300–350 MPa | 450–520 MPa | Structural / pressure |
| Elongation | 40–45% | 10–15% | Bending vs rigidity |
| Formability | Excellent | Limited | Complex shaping |
| Pressure Resistance | Moderate | High | Hydraulics |
| Vibration Resistance | High | Very High | Automotive & marine |
| Dimensional Tolerances – Cartridge Brass Pipes | |||
|---|---|---|---|
| Parameter | ASTM B135 | EN 12449 | IS 407 |
| OD Tolerance | ±0.05 mm | ±0.06 mm | ±0.10 mm |
| Wall Thickness | ±10% | ±10% | ±12% |
| Length | ±5 mm | ±5 mm | ±10 mm |
| Straightness | 1/1000 | 1/1000 | 1/800 |
| Corrosion Resistance Matrix – Cartridge Brass (CuZn30) | |||
|---|---|---|---|
| Environment | Resistance Level | Remarks | Recommended? |
| Fresh Water | Excellent | No dezincification | ✔ Yes |
| Steam | Excellent | Stable under heat | ✔ Yes |
| Marine Atmosphere | Good | Protective oxide film | ✔ Yes |
| Ammonia | Poor | Stress corrosion risk | ✖ No |
| Sour Fluids | Moderate | Depends on pH | ⚠ Conditional |
| Typical EPC / Consultant Specification Reference | ||
|---|---|---|
| Parameter | Specification | Compliance |
| Material | Cartridge Brass CuZn30 | ✔ |
| Standard | ASTM B135 / EN 12449 | ✔ |
| Temper | O / H as specified | ✔ |
| NDT | Eddy Current Test | Optional |
| Certification | MTC EN 10204 3.1 | ✔ |
⚠ Important Engineering Notes:
- CuZn30 is preferred where high ductility and cold-working are required.
- Do NOT use in ammonia or high-sulphide environments.
- Hard-drawn pipes must not be aggressively bent without intermediate annealing.
- Pressure ratings assume 20°C working temperature.
- Always verify compatibility with fittings to avoid stress cracking.
