Description (English)
Shanghai Vertex Alloy Co., Ltd (Vertex Alloy) supplies C93200 bronze round bar (SAE 660 high-leaded tin bronze / bearing bronze; nominal composition Cu 83 / Sn 7 / Pb 7 / Zn 3; European equivalent RG7 / CuSn7Zn4Pb7; near-equivalent Chinese grade ZCuSn6Zn6Pb3). C93200 is the world's most widely used general-purpose bearing bronze: the dispersed lead phase acts as a built-in solid lubricant giving low friction, anti-seizing behavior and excellent conformability, while tin strengthens the matrix and provides corrosion resistance in seawater, brine and many industrial chemicals — the alloy is not subject to dezincification. Machinability rating 70 (free-cutting). Continuous cast round bars Ø 12.7–330 mm to ASTM B505/B505M with tensile ≥ 241 MPa, yield ≥ 138 MPa and ~65 HB hardness; centrifugal cast (B271) and sand cast (B584) options available, EN 10204 3.1 certificates. Bushings, bearings, thrust washers and worm gears machined per drawing also available. Contact us for the latest stock and pricing.
Size Range
- 12.7–330 mm
Grade Specification
| System | Value |
|---|---|
| C93200 (SAE 660, Bearing Bronze) | - |
| C93200 | - |
| CuSn7Zn4Pb7 (RG7, DIN 1705 G-CuSn7ZnPb) | - |
| ZCuSn6Zn6Pb3 (6-6-3 tin bronze, approximate) | - |
Chemical Composition
| Element | Value |
|---|---|
| Cu | 81.0–85.0 |
| Sn | 6.3–7.5 |
| Pb | 6.0–8.0 |
| Zn | 1.0–4.0 |
| Ni | ≤ 1.00 |
| Fe | ≤ 0.20 |
| Sb | ≤ 0.35 |
| S | ≤ 0.08 |
| P | ≤ 0.15 |
| Al | ≤ 0.005 |
| Si | ≤ 0.005 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 241 MPa (35 ksi) |
| Yield Strength (0.5% ext.) | ≥ 138 MPa (20 ksi) |
| Elongation (50 mm) | ≥ 10% (typical 10–15%) |
| Hardness | 65 HB |
Physical Properties
| Property | Unit | Value |
|---|---|---|
| Density | - | 8.91 g/cm³ (0.322 lb/in³) |
| Melting Point — Solidus | - | 854°C (1570°F) |
| Melting Point — Liquidus | - | 977°C (1790°F) |
| Elastic Modulus | - | 100 GPa (14,500 ksi) |
| Thermal Conductivity | - | 58.2 W/m·K |
| CTE (20–100°C) | - | 17.3 × 10⁻⁶ /K |
| Specific Heat | - | 377 J/kg·K |
| Electrical Conductivity | - | 12% IACS |
| Poisson's Ratio | - | 0.34 |
| Stress Relief | - | 260°C (500°F) |
Applications
- Industrial Machinery
- Metals & Rolling Mills
- Presses & Forging
- Pumps
- Diesel Engines
- Transmission
- Marine
- Automotive
- Valves