What is C28000 brass?
C28000 is a lead-free material which is however quite suitable for machining Due to its structural constitution. C28000 can be therefore used as a cost-effective Replacement for conventional lead-containing machining brass provided that it must not meet high requirements as regards mechanical properties and corrosion Resistance.
Chemical Composition
| Elements | Min (%) | Max (%) |
|---|---|---|
| Cu | 59.00 | 63.00 |
| Pb | - | 0.30 |
| Fe | - | 0.07 |
| Total Others | - | 0.30 |
| Zn | Remainder | |
Mechanical Properties According To ASTM B36 (As Per Temper HO2)
| Range (inch) | From | To | UTS Min (ksi) | UTS Max (ksi) | PS Min (ksi) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) | |
|---|---|---|---|---|---|---|---|---|---|
| Round (Dia) | 0.059 | 2.953 | 58 | 70 | - | - | 52 | 80 | |
| Hex (A/F) | 0.118 | 2.756 | 58 | 70 | - | - | 52 | 80 | |
| Square (A/F) | 0.118 | 2.362 | 58 | 70 | - | - | 52 | 80 | |
| Range (mm) | From | To | UTS Min (MPa) | UTS Max (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) | |
|---|---|---|---|---|---|---|---|---|---|
| Round (Dia) | 1.5 | 75 | 400 | 485 | - | - | 52 | 80 | |
| Hex (A/F) | 3 | 70 | 400 | 485 | - | - | 52 | 80 | |
| Square (A/F) | 3 | 60 | 400 | 485 | - | - | 52 | 80 | |
Physical Properties
| Melting Point - Liquidus °F | 1660 |
| Melting Point - Solidus °F | 1650 |
| Density lb/cu in at 68°F | 0.303 |
| Specific Gravity | 8.39 |
| Electrical Conductivity %IACS at 68°F | 28 |
| Thermal Conductivity BTU/ sq ft/ ft hr/ °F at 68°F | 71 |
| Coefficient of Thermal Expansion 68-572 10⁻⁶ per °F (68 – 572°F) | 11.6 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tension ksi | 15000 |
| Modulus of Rigidity ksi | 5600 |
Fabrication Properties
| Technique | Suitability |
|---|---|
| Soldering | Excellent |
| Brazing | Excellent |
| Oxyacetylene Welding | Good |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Not Recommended |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Fair |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 90 |
| Machinability Rating | 40 |
typical uses
Architecture
Builders Hardware
Fasteners
Industrial
Our factory
We operate a modern, specialized copper production facility equipped with advanced continuous casting and rolling lines, precision CNC machining equipment, and a rigorous quality inspection system, focusing on the manufacturing of copper tubes, plates, rods, wires, and strips. The factory is ISO9001 certified and possesses a complete industry chain capability-from raw material smelting and precision processing to finished product sorting. With an annual production capacity of tens of thousands of tons, we can flexibly handle customized orders, ensuring that our products meet international standards in dimensional accuracy, mechanical properties, and surface finish.
Copper product packaging
We implement customized packaging solutions based on product characteristics: copper tubes and rods are wrapped with moisture-resistant kraft paper, reinforced with bundling, and secured on wooden pallets or iron frame boxes to prevent deformation and damage during transit. Copper plates and strips are covered with protective film, separated by foam padding between layers, and externally secured with steel strapping along with waterproof packaging. Wires are coiled on industrial reels or vacuum-packed with plastic film. All packaging includes clear labels indicating product specifications, batch numbers, and protective symbols, ensuring safe delivery during long-distance sea and land transportation.
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