Aluminum Brass Bar C68700 CuZn20Al2 CZ110 CW702R
Chemical Composition
| Cu% | Sn% | Pb% | Zn% | Fe% | Ni% | Sb% | P% | S% | AI% | Mn% | Si% |
| 81.00- 85.00 |
6.30- 7.50 |
6.00- 8.00 |
2.00- 4.00 |
0.20 |
*1.00 |
0.35 |
1.5 |
0.08 |
0.005 |
N/A |
0.005 |
*In determining copper minimum, copper may be calculated as copper plus nickel
Mechanical Properties
| Tensile Strength. min | 35 ksi | 241 MPa |
| Yield Strength @ .5% ext under load min | 20 ksi | 138 MPa |
| Elongation in 2 in. or 50 mm min, % | 10 | |
| Brinell Hardness,min | N/A | |
| Machinability Rating | 70% | |
Physical Properties
| US Customary | Metric | |
| Melting Point-Liquidus | 1790 °F | 977 °C |
| Melting Point-Solidus | 1570 °F | 854 °C |
| Density | 0.322 lb/in 3 @ 68 °F |
8.91 gm/cm 3 @ 20 °C |
| Specific Gravity | 8.910 | 8.91 |
| Electrical Resistivity | 85.90 ohms-cmil/ft @ 68 °F |
14.29 microhm-cm @ 20 °C |
| Electrical Conductivity | 12% IACS @ 68 °F |
0.07 MegaSiemens/cm @ 20 °C |
| Thermal Conductivity | 33.60 Btu/sq ft/ft hr/°F @ 68 °F |
58.2 W/m @ 20 °C |
| Coefficient of Thermal Expanision |
10 ⋅ 10-6 per °F (68-212 °F) |
18.0⋅ 10-6 per °C (20-100 °C) |
| Specific Heat Capacity | 0.090 Btu/lb/°F @ 68 °F |
377.1 J/kg @293 °C |
| Modulus of Elasticity in Tension |
14500 ksi | 100000 MPa |
| Magnetic Permeability* | N/A | N/A |
| *Field Strength 16 kA/m | ||
Fabrication Properties
| Joining Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |
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