C64200 is an engineering alloy at least as resistant to corrosion as copper itself, but much stronger. C642 is manufactured mostly in the form of round, hexagonal, and octagonal rods for hot forming and free machining. C64200 is considered to be one of the best valve stem alloys. Other applications include gears, marine hardware, nuts, pole line hardware, and valve bodies and components.
Valve Guides, Automobile Engine
Pole Line Hardware
Bolts, Nuts
Valve Components, Valve Bodies, Gears, Valve Stems, Cams
Hardware
| Cu% | Sn% | Pb% | Zn% | Fe% | Ni% | Sb% | P% | S% | AI% | Mn% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
Rem. | 0.20 | 0.05 | 0.50 | 0.30 | 0.25 | N/A | N/A | N/A | 6.30- 7.60 | 0.10 | 1.50- 2.20 |
| Mechanical - HR50 Drawn and Stress Relieved Temper: Under 1/2” Bars and Rods inclusive | ||
|---|---|---|
| Tensile Strength, min | 90 ksi | 621 MPa |
| Yield Strength @ .5% ext under load min | 45 ksi | 310 MPa |
| Elongation in 2 in. or 50 mm min, % | 9 | |
| Brinell Hardness | N/A | |
| Machinability Rating | 60% | |
| Mechanical - HR50 Drawn and Stress Relieved Temper: 1/2” to 1” Bars and Rods inclusive | ||
|---|---|---|
| Tensile Strength, min | 85 ksi | 586 MPa |
| Yield Strength @ .5% ext under load min | 45 ksi | 310 MPa |
| Elongation in 2 in. or 50 mm min, % | 12 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 60% | |
| Mechanical - HR50 Drawn and Stress Relieved Temper: over 1” to 2” Bars and Rods inclusive | ||
|---|---|---|
| Tensile Strength, min | 85 ksi | 550 MPa |
| Yield Strength @ .5% ext under load min | 42 ksi | 290 MPa |
| Elongation in 2 in. or 50 mm min, % | 12 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 60% | |
| Mechanical - HR50 Drawn and Stress Relieved Temper: over 2” to 3” Bars and Rods inclusive | ||
|---|---|---|
| Tensile Strength, min | 75 ksi | 517 MPa |
| Yield Strength @ .5% ext under load min | 35 ksi | 241 MPa |
| Elongation in 2 in. or 50 mm min, % | 15 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 60% | |
| US Customary | Metric | |
|---|---|---|
| Melting Point-Liquidus | 1840 °F | 1004 °C |
| Melting Point-Solidus | 1800 °F | 982 °C |
| Density | 0.278 lb/in 3 @ 68 °F | 7.69 gm/cm 3 @ 20 °C |
| Specific Gravity | 7.69 | 7.69 |
| Electrical Resistivity | 113 ohms-cmil/ft @ 68 °F | 18.79 microhm-cm @ 20 ° |
| Electrical Conductivity | 8% IACS @ 68 °F | 0.047 MegaSiemens/cm @ 20 °C |
| Thermal Conductivity | 26 Btu/sq ft/ft hr/°F @ 68 °F | 45 W/m @ 20 °C |
| Coefficient of Thermal Expansion | 10 ⋅ 10-6 per °F (68-572 °F) | 17.3 ⋅ 10-6 per °C (20-300 °C) |
| Specific Heat Capacity | 0.09 Btu/lb/°F @ 68 °F | 377.1 J/kg @ 20 °C |
| Modulus of Elasticity in Tension | 16000 ksi | 110317 MPa |
| Magnetic Permeability | 6000 ksi | 41369 MPa |
| Joining Technique | Suitability |
|---|---|
| Soldering | Not Recommended |
| Brazing | Fair |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Fair |
| Spot Weld | Fair |
| Butt Weld | Fair |
| Capacity for being Cold Worked | Poor |
| Capacity for being Hot Formed | Excellent |
| Forgeability Rating | 80 |
