C64200 Silicon Aluminum Bronze is an engineering alloy at least as resistant to corrosion as copper itself, but much stronger. CDA 642 bronze is manufactured mostly in the form of round, hexagonal, and octagonal rods for hot forming and free machining. C642 is considered to be of the best valve stem alloys. Other applications include gears, marine hardware, nuts, pole line hardware, and valve bodies and components.
EU Designation: CuAl7Si2, CW302G
ASTM B150, ASTM B249, QQ-C-465, AMS 4634, SAE J461, SAE J463
Typical Uses for C64200 Silicon Aluminum Bronze:
AUTOMOTIVE: Valve Guides, Automobile Engine
ELECTRICAL: Pole Line Hardware
FASTENERS: Bolts, Nuts
INDUSTRIAL: Valve Components, Valve Bodies, Gears, Valve Stems, Cams
MARINE: Hardware
Sizes Available From Aviva Metals
SOLID BAR . . . . . . . . . . 3/16" - 8" diameter
HEX BAR . . . . . . . . . . . . 5/8" - 2 1/2" across the flats
Specifications
| End Product | Specification |
| Bar | AMS 4634, ASME SB150, ASTM B150 |
| Bar, Forging | ASTM B124 |
| Bolts | ASTM F468 |
| Forgings, Die | AMS 4634, 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 |
| 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 | 7.0000 | - | 91.2000 | - | - | - | - | 1.8000 | - | - |
| Product Type | Temper Type |
| Bar | AMS 4634, ASME SB150, ASTM B150 |
| Bar, Forging | ASTM B124 |
| Bolts | ASTM F468 |
| Forgings, Die | AMS 4634, ASME SB283, ASTM B283 |
| Nuts | ASTM F467 |
| Rod | AMS 4634, ASME SB150, ASTM B150, SAE J463, J461 |
| Rod, Forging | ASTM B124 |
| Screws | ASTM F468 |
| Shapes | ASTM B150 |
| Shapes, Forging | ASTM B124 |
| Studs | ASTM F468 |
| Temper | Sect. Size | Cold Work | Type Min | Temp | Tensile Strength | YS 0.05% UL | YS 0.02% Offset | YS 0.005% Offset | Elong. | RH B | RH C | RH F | RH 30T | VH 500 | BH 500 | BH 3000 | Shear Strgth | Fatigue Strgth | Izod Impact Strgth |
| - | in. | % | - | F | ksi | ksi | ksi | ksi | % | B | C | F | 30T | 500 | 500 | 3000 | ksi | ksi | ft-lb |
| - | mm. | - | - | C | MPa | MPa | MPa | MPa | - | - | - | - | - | - | - | - | MPa | MPa | J |
| Bar | |||||||||||||||||||
| M30 | 0.75 | 68 | 75 | 35 | - | - | - | - | - | - | - | - | - | - | - | - | |||
| M30 | 19 | 0 | TYP | 20 | 517 | 241 | - | - | 32 | 77 | - | - | - | - | - | - | - | - | 0 |
| Forgings | |||||||||||||||||||
| M10 | 2.01 | 68 | 79 | 38 | - | - | - | - | - | - | - | - | - | - | - | - | |||
| M10 | 51 | 0 | TYP | 20 | 545 | 262 | - | - | 30 | 78 | - | - | - | - | - | - | - | - | 0 |
| Rod | |||||||||||||||||||
| M30 | 0.75 | 68 | 75 | 35 | - | - | - | - | - | - | - | - | - | - | - | - | |||
| M30 | 19 | 0 | TYP | 20 | 517 | 241 | - | - | 32 | 77 | - | - | - | - | - | - | - | - | 0 |
| H04 | 1.5 | 68 | 93 | 60 | - | - | - | - | - | - | - | - | - | - | - | - | |||
| H04 | 38 | 10 | TYP | 20 | 641 | 414 | - | - | 26 | 90 | - | - | - | - | - | - | - | - | 0 |
| H04 | 0.75 | 68 | 102 | 68 | - | - | - | - | - | - | - | - | - | - | 59 | 50 | |||
| H04 | 19 | 15 | TYP | 20 | 703 | 469 | - | - | 22 | 94 | - | - | - | - | - | - | 407 | 345 | 0 |
| O50 | 0.75 | 68 | 90 | 55 | - | - | - | - | - | - | - | - | - | - | - | - | |||
| O50 | 19 | 0 | TYP | 20 | 621 | 379 | - | - | 28 | 89 | - | - | - | - | - | - | - | - | 0 |
| O50 | 0.5 | 68 | 92 | 58 | - | - | - | - | - | - | - | - | - | - | - | - | |||
| O50 | 12.7 | 0 | TYP | 20 | 634 | 400 | - | - | 22 | 98 | - | - | - | - | - | - | - | - | 0 |
| 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 |
| 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 |
