C67420 is a special brass with very high wear resistance due to silicides embedded in the structure. This alloy is used for slide bearings and valve guides as well as for construction components in mechanical engineering. C67420 is also highly suitable for hot stamped parts requiring higher mechanical strength and higher Wear resistance.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 57.00 | 58.50 |
| Pb | 0.25 | 0.80 |
| Sn | – | 0.35 |
| Al | 1.00 | 2.00 |
| Fe | 0.15 | 0.55 |
| Mn | 1.50 | 2.50 |
| Ni | – | 0.25 |
| Si | 0.25 | 0.70 |
| Total Others | – | 0.50 |
| Zn | Remainder |
Mechanical Properties according To UNS C67420 (As Per Temper HO2)
| Range (Inch) | From | To | UTS Min (ksi) | PS Min (ksi) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max |
| Round (Dia) | 0.059 | 2.953 | 87 | 46 | 15 | 85 | – |
| Hex (A/F) | 0.118 | 2.756 | 87 | 46 | 15 | 85 | – |
| Square (A/F) | 0.118 | 2.362 | 87 | 46 | 15 | 85 | – |
| Rectangle (Thickness) | 0.118 | 1.968 | 87 | 46 | 15 | 85 | – |
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Range(mm)
| From | To | UTS Min (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max |
| Round (Dia) | 1.5 | 75 | 600 | 317 | 15 | 85 | – |
| Hex (A/F) | 3 | 70 | 600 | 317 | 15 | 85 | – |
| Square (A/F) | 3 | 60 | 60 | 600 | 317 | 15 | 85 | – |
| Rectangle (Thickness) | 3 | 50 | 600 | 317 | 15 | 85 | – |
| PHYSICAL PROPERTIES |
| Melting Point – Liquidus°F | 1650 |
| Melting Point – Solidus°F | 1590 |
| Density lb/cu in. at 68°F | 0.299 |
| Specific Gravity | 8.27 |
| Electrical Conductivity % IACS at 68°F | 18 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 51 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tension ksi | 14000 |
| Modulus of Rigidity ksi | 5250 |
| Fabrication Properties |
| Technique | Suitability |
| Soldering | Fair |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Good |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Poor |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 100 |
| Machinability Rating | 50 |
TYPICAL USES
