PB1 Bronze Alloy Casting
PB1 Bronze Alloy Casting is a phosphor bronze specified under BS 1400 PB1, containing nominally 89% copper, 11% tin, and a controlled phosphorus content for deoxidation. PB1 is characterized by high hardness, excellent wear resistance, and low coefficient of friction, making it the preferred choice for demanding gear and worm wheel applications. Indicative price: US$ 10.50/kilogram.
PB1 Chemical Composition (BS 1400)
| Element |
Min % |
Max % |
| Copper (Cu) |
87.0 |
90.5 |
| Tin (Sn) |
9.5 |
11.5 |
| Phosphorus (P) |
0.10 |
0.50 |
| Lead (Pb) |
— |
0.10 |
| Zinc (Zn) |
— |
0.10 |
| Iron (Fe) |
— |
0.10 |
PB1 Mechanical Properties (Sand Cast – BS 1400)
| Property |
Value |
| Tensile Strength |
310 MPa min |
| Yield Strength |
155 MPa min |
| Elongation |
10% min |
| Brinell Hardness |
85 HB typical |
| Density |
8.77 g/cm³ |
International Equivalents of PB1 Bronze
| Standard |
Designation |
Common Name |
| UK – BS 1400 |
PB1 |
Phosphor Bronze |
| USA – UNS |
C90700 |
Tin Bronze (89-11) |
| Europe – EN 1982 |
CC490K |
CuSn10 |
| Germany – DIN |
2.1050 |
CuSn10 |
| ISO 1338 |
CuSn10 |
Tin Bronze |
| Japan – JIS H5111 |
CAC402 |
Tin Bronze |
Typical Applications
PB1 phosphor bronze alloy castings are used for: gears and worm wheels against steel worms, heavily loaded slow-speed bearings, bridge expansion bearings, pump impellers, piston rings, and industrial machinery components subject to heavy wear.
← Back to Tin Bronze Casting
