A proven alloy in a wide number of uses, C90300 (SAE 620) Tin Bronze is most often used in high load, low speed applications. The alloy is hard, strong and can be counted on to withstand wear and corrosion. C90300 can be used for welding, brazing and soldering. Final components made of this alloy require good alignment and lubrication of mated parts.
Valves, Potable Water Applications, Gears, Pump Components, Bearings, Bushings, Pump Impellers, Piston Rings, Valve Components, Seal Rings, Steam Fittings, Trunnion Bearings, Wrist-Pin Bushings, Piston-Pin Bushings, Machine Tool Bushings, Roll-Mill Bearings, and Bridge Bearings
Marine Fittings
Plumbing Fixtures
| Cu% | Sn% | Pb% | Zn% | Fe% | Ni% | Sb% | P% | S% | AI% | Mn% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 86.00- 89.00 | 7.50- 9.00 | 0.30 | 3.00- 5.00 | 0.20 | 1.00 | 0.20 | 0.05 | 0.05 | 0.005 | N/A | 0.005 |
| Tensile Strength, min | 44 ksi | 303 MPa |
| Yield Strength @ .5% ext under load min | 22 ksi | 152 MPa |
| Elongation in 2 in. or 50 mm min, % | 18 | |
| Brinell Hardness | 70 typical Bhn (500 kg) | |
| Machinability Rating | 30% | |
| US Customary | Metric | |
|---|---|---|
| Melting Point-Liquidus | 1832 °F | 1000 °C |
| Melting Point-Solidus | 1570 °F | 854 °C |
| Desnity | 0.318 lb/in 3 @ 68 °F | 8.80 gm/cm 3 @ 20 °C |
| Specific Gravity | 8.81 | 8.81 |
| Electrical Resistivity | N/A | N/A |
| Electrical Conductivity | 12% IACS @ 68 °F | 0.069 MegaSiemens/cm @ 20 °C |
| Thermal Conductivity | 43.2 Btu/sq ft/ft hr/°F @ 68 °F | 74.8 W/m @ 20 °C |
| Coefficient of Thermal Expansion | 10 ⋅ 10-6 per °F (68-392 °F) | 17.3 ⋅ 10-6 per °C (20-200 °C) |
| Specific Heat Capacity | 0.09 Btu/lb/°F 68 °F | 377.1 J/kg @293 °C |
| Modulus of Elasticity in Tension | 14000 ksi | 96527 MPa |
| Magnetic Permeability | 1 | 1 |
| Joining Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Fair |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Fair |
