PB2 Bronze Alloy Casting
PB2 Bronze Alloy Casting is a high-tin phosphor bronze specified under BS 1400 PB2, containing nominally 85% copper, 14% tin, and controlled phosphorus. PB2 is the highest-tin standard British casting alloy, providing maximum hardness and exceptional wear resistance for the most demanding worm gear and high-load bearing applications. Indicative price: US$ 11.50/kilogram.
PB2 Chemical Composition (BS 1400)
| Element |
Min % |
Max % |
| Copper (Cu) |
83.0 |
87.0 |
| Tin (Sn) |
12.5 |
15.0 |
| Phosphorus (P) |
0.10 |
0.50 |
| Lead (Pb) |
— |
0.10 |
| Zinc (Zn) |
— |
0.10 |
| Iron (Fe) |
— |
0.10 |
PB2 Mechanical Properties (Sand Cast – BS 1400)
| Property |
Value |
| Tensile Strength |
280 MPa min |
| Yield Strength |
175 MPa min |
| Elongation |
3% min |
| Brinell Hardness |
95 HB typical |
| Density |
8.67 g/cm³ |
International Equivalents of PB2 Bronze
| Standard |
Designation |
Common Name |
| UK – BS 1400 |
PB2 |
High Tin Phosphor Bronze |
| USA – UNS |
C91100 |
High Tin Bronze (84-16) |
| Europe – EN 1982 |
CC492K |
CuSn11Pb2 |
| Germany – DIN |
2.1060 |
CuSn14 |
| ISO 1338 |
CuSn12 |
High Tin Bronze |
| Japan – JIS H5111 |
CAC403 |
High Tin Bronze |
Typical Applications
PB2 high-tin phosphor bronze alloy castings are used for: worm gear wheels against hardened steel worms, heavy-duty slow-speed gears, bridge bearings and expansion plates, extreme pressure bearing applications, and specialized wear-resistant components.
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