Silicon Bronze
Copper Alloy No. C65500 (High Silicon Bronze A)
Composition - Percent
| Nominal | Minimum | Maximum | |
|---|---|---|---|
| Copper | 97 | Remainder | |
| Lead | - | - | 0.05 |
| Iron | - | - | 0.80 |
| Zinc | - | - | 1.50 |
| Manganese | - | 0.50 | 1.30 |
| Silicon | 3 | 2.80 | 3.80 |
| Nickel | - | - | 0.60 |
Nearest Applicable A S T M Specifications
| Bolts | F468 |
| Flat Products | B96, B98, B100, B124, B432 |
| Nuts | F467 |
| Pipe | B315 |
| Rod | B98, B124 |
| Screws | F468 |
| Shapes | B98, B124, B283 |
| Studs | F468 |
| Tube | B315 |
| Wire | B99, B105 |
Physical Properties
| English Units | C.G.S. Units | |
|---|---|---|
| Melting Point (Liquidus) | 1880°F | 1025°C |
| Melting Point (Soluidus) | 1780°F | 970°C |
| Density | .308lb / cu in @ 68°F | 8.53 gm / cu cm @ 20°C |
| Specific Gravity | 8.53 | 8.53 |
| Coefficient of Thermal Expansion | per °F from 68°F to 212°F | per °C from 20°F to 100°F |
| Coefficient of Thermal Expansion | per °F from 68°F to 392°F | per °C from 20°F to 200°F |
| Coefficient of Thermal Expansion | .0000100 per °F from 68°F to 572°F | .0000180 per °C from 20°F to 300°F |
| Thermal Conductivity | 21 Btu / sq ft / ft / hr / °F @ 68°F | 0.9 cal / sq cm / cm / sec / °C @ 20°C |
| Electrical Resistivity (Annealed) | 148 Ohms (circ mil / ft) @ 68°F | 24.6 Microhm-cm @ 20°C |
| Electrical Conductivity* (Annealed) | 7.0 % IACS @ 68°F | .0406 Megmho-cm @ 20°C |
| Thermal Capacity (Specific Heat) | 09 Btu / lb °F @ 68°F | .09 cal / gm / °C @ 20°C |
| Modulus of Elasticity (Tension) | 15,000 ksi | 10,500 Kg /sq mm |
| Modulus of Rigidity | 5,600 ksi | 3,900 Kg /sq mm |
*Volume Basis
Typical Uses
- Aircraft:
-
hydraulic pressure lines
- Hardware:
-
bolts, burrs, butts, clamps, cotter pins, hinges, marine hardware, nails, nuts, pole line hardware, screws
- Industrial:
-
bearing plates, bushings, cable, channels, chemical equipment, heat exchanger tubes, kettles, piston rings, tanks, rivets, screen cloth and wire, screen plates, shafting
- Marine:
-
propeller shafts
Common Fabrication Processes
Blanking, drawing, forming and bending, heading and upsetting, hot forging and pressing, roll threading and knurling, shearing, squeezing and swaging
Fabrication Properties
| Capacity for Being Cold Worked | Excellent |
| Capacity for Being Hot Formed | Excellent |
| Hot Forgeability Rating (Forging Brass = 100) | 40 |
| Hot Working Temperature | 1300-1600°F or 700-875°C |
| Annealing Temperature | 900-1300°F or 475-700°C |
| Machinability Rating (Free Cutting Brass = 100) | 30 |
| Suitability for being joined by: | |
|---|---|
| Soldering | Good |
| Brazing | Excellent |
| Oxyacetylene Welding | Good |
| Gas Shielded Arc Welding | Excellent |
| Coated Metal Arc Welding | Fair |
| Resistance Welding | |
| Spot | Excellent |
| Seam | Excellent |
| Butt | Excellent |