C69710
C69710 brass is a type of brass alloy specifically developed for the initial shaping and forming of wrought products. Typically, it is supplied in the H04 temper, denoting full hardening. This brass alloy is characterized by a moderately low melting point and relatively high tensile strength compared to other wrought brass alloys.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 75.0 | 80.0 |
| Pb | 0.50 | 1.50 |
| Fe | – | 0.20 |
| Mn | – | 0.40 |
| Si | 2.50 | 3.50 |
| As | 0.03 | 0.06 |
| Total Others | – | 0.50 |
| Zn | Remainder | |
| (1) Cu + Sum of Named Elements 99.5% min. (2) Cu value includes Ag. | ||
MECHANICAL PROPERTIES ACCORDING TO ASTM B371 (AS PER TEMPER HO2)
| Range (Inch) | From | To | UTS Min (ksi) | PS Min (ksi) | Elongation Min (%) | Hardness Min | Hardness Max |
| Round (Dia) | 0.059 | 1.000 | 65 | 32 | 20 | – | – |
| 1.000 | 2.953 | 55 | 28 | 25 | – | – | |
| Hex (A/F) | 0.118 | 1.000 | 65 | 32 | 20 | – | – |
| 1.000 | 2.755 | 55 | 28 | 25 | – | – | |
| Square (A/F) | 0.118 | 1.000 | 65 | 32 | 20 | – | – |
| 1.000 | 2.362 | 55 | 28 | 25 | – | – |
| Range (mm) | From | To | UTS Min (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min | Hardness Max |
| Round (Dia) | 1.5 | 25 | 450 | 220 | 20 | – | – |
| 25 | 75 | 380 | 195 | 25 | – | – | |
| Hex (A/F) | 3 | 25 | 450 | 220 | 20 | – | – |
| 25 | 70 | 380 | 195 | 25 | – | – | |
| Square (A/F) | 3 | 25 | 450 | 220 | 20 | – | – |
| 25 | 60 | 380 | 195 | 25 | – | – |
| PHYSICAL PROPERTIES | |
| Melting Point – Liquidus°F | 1706 |
| Density lb/cu in. at 68°F | 0.3 |
| Specific Gravity | 8.3 |
| Electrical Conductivity % IACS at 68°F | 8 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 23 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 10.7 |
| Modulus of Elasticity in Tension ksi | 16000 |
| FABRICATION PROPERTIES | |
| Technique | Suitability |
| Capacity for Being Hot Formed | Excellent |
| Machinability Rating | 70 |
