CuSn10 Bronze Casting
CuSn10 Bronze Casting is a high-tin bronze specified under ISO 1338 CuSn10, containing nominally 90% copper and 10% tin. This alloy is the ISO designation for unleaded high-tin bronze, delivering excellent hardness, wear resistance, and load-bearing capacity for gears, bearings, and heavy engineering applications. Indicative price: US$ 10.00/kilogram.
CuSn10 Chemical Composition (ISO 1338)
| Element |
Min % |
Max % |
| Copper (Cu) |
rem |
— |
| Tin (Sn) |
9.0 |
11.0 |
| Phosphorus (P) |
0.01 |
0.40 |
| Lead (Pb) |
— |
0.10 |
| Zinc (Zn) |
— |
0.10 |
CuSn10 Mechanical Properties (Sand Cast – ISO 1338)
| Property |
Value |
| Tensile Strength |
270 MPa min |
| Yield Strength (0.2%) |
140 MPa min |
| Elongation |
8% min |
| Brinell Hardness |
85 HB typical |
| Density |
8.77 g/cm³ |
International Equivalents of CuSn10
| Standard |
Designation |
Common Name |
| ISO 1338 |
CuSn10 |
Tin Bronze |
| Europe – EN 1982 |
CC490K |
CuSn10 |
| Germany – DIN |
2.1050 |
CuSn10 |
| UK – BS 1400 |
PB1 |
Phosphor Bronze |
| USA – UNS |
C90700 |
Tin Bronze (89-11) |
| Japan – JIS H5111 |
CAC402 |
Tin Bronze |
Typical Applications
CuSn10 bronze castings are used for: gears and worm wheels, high-load bearings, bridge bearings, pump impellers, piston rings, and industrial machinery components requiring high wear resistance.
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