C64200 Silicon Aluminum Bronze
ASTM B249, QQ-C-465, AMS 4631, AMS 4634, EU Designation: CuAl7Si2, CW302G
The C64200 silicone aluminum alloy is an engineering alloy which is resistant to corrosion as copper and is much stronger. Is is manufactured in round, hexagonal and octagonal rods for hot forming and free machining. It is considered as best valve stem alloy and its other applications include gears, marine hardware, nuts, pole line hardware, and valve bodies and components.
Typical Uses :
- Automotive : Valve Guides, Automobile Engine
- Electrical: Pole Line Hardware
- Fasteners: Bolts, Nuts
- Industrial: Valve Components, Valve Bodies, Gears, Valve Stems, Cams
- Marine: Hardware
Equivelent Specifications:
Chemical Composition:
Specifications :
Fabrication :
Physical Properties :
Sizes Available:
| Specifications | Designation |
| ISO | CuAl7Si2 |
| European | CuAl7Si2 |
| UNS | C64210 |
| Al | As | Cu | Fe | Pb | Mn | Ni | Si | Sn | Zn | |
| Min/Max | 6.3 – 7.6 | 0.15 | Rem | 0.3 | 0.05 | 0.1 | 0.25 | 1.5 – 2.2 | 0.2 | 0.5 |
| Nominals | 7 | – | 91.2 | – | – | – | – | 1.8 | – | – |
| End Product | Specification |
| Bar | AMS 4631, ASME SB150, ASTM B150 |
| Bar, Forging | ASTM B124 |
| Bolts | ASTM F468 |
| Forgings, Die | AMS 4631, ASME SB283, ASTM B283 |
| Nuts | ASTM F467 |
| Rod | AMS 4631, ASME SB150, ASTM B150, SAE J463, J461 |
| Rod, Forging | ASTM B124 |
| Screws | ASTM F468 |
| Shapes | ASTM B150 |
| Shapes, Forging | ASTM B124 |
| Studs | ASTM F468 |
| Joining Technique | Suitability |
| Brazing | Fair |
| Butt Weld | Fair |
| Capacity for Being Cold Worked | Poor |
| Capacity for Being Hot Formed | Excellent |
| Coated Metal Arc Welding | Fair |
| Gas Shielded Arc Welding | Fair |
| Machinability Rating | 80 |
| Oxyacetylene Welding | Not Recommended |
| Seam Weld | Fair |
| Soldering | Not Recommended |
| Spot Weld | Fair |
| Product Property | US Customary | Metric |
| Coefficient of Thermal Expansion | 10.0 ·10-6 per oF (68-572 F) | 18.0 ·10-6 per oC (20-300 C) |
| Density | 0.278 lb/in3 at 68 F | 7.7 gm/cm3 @ 20 C |
| Electrical Conductivity | 8 %IACS @ 68 F | 0.047 MegaSiemens/cm @ 20 C |
| Electrical Resistivity | 113.0 ohms-cmil/ft @ 68 F | 18.79 microhm-cm @ 20 C |
| Melting Point – Liquidus | 1840 F | 1004 C |
| Melting Point – Solidus | 1800 F | 982 C |
| Modulas of Elasticity in Tension | 16000 ksi | 110000 MPa |
| Modulus of Rigidity | 6000 ksi | 41370 MPa |
| Specific Gravity | 7.69 | 7.69 |
| Specific Heat Capacity | 0.09 Btu/lb/·oF at 68F | 377.1 J/kg ·oK at 293 K |
| Thermal Conductivity | 26.0 Btu · ft/(hr · ft2·oF)at 68F | 45.0 W/m · oK at 20 C |
| ROUND RODS | 8mm To 70 mm |
| HEX | 10mm To 60mm |
| SQUARE | 10mm To 60mm |
| FLAT | 10mm Min Thickness and max Width 120mm |
| BILLETS | Up to 200 mm |
| INGOTS | As per Specification |
