CAC402 Bronze Casting
CAC402 Bronze Casting is a tin bronze specified under JIS H 5111 CAC402 (formerly BC2), containing nominally 90% copper and 10% tin. The Japanese Industrial Standard equivalent of the European CuSn10 and the British PB1 phosphor bronze, CAC402 is used for high-hardness gears, worm wheels, and precision bearings in Japanese and global industrial equipment. Indicative price: US$ 10.00/kilogram.
CAC402 Chemical Composition (JIS H 5111)
| Element |
Min % |
Max % |
| Copper (Cu) |
rem |
— |
| Tin (Sn) |
9.0 |
11.0 |
| Zinc (Zn) |
— |
1.0 |
| Lead (Pb) |
— |
0.50 |
| Phosphorus (P) |
0.05 |
0.30 |
| Iron (Fe) |
— |
0.10 |
CAC402 Mechanical Properties (Sand Cast – JIS H 5111)
| Property |
Value |
| Tensile Strength |
275 MPa min |
| Yield Strength (0.2%) |
145 MPa min |
| Elongation |
8% min |
| Brinell Hardness |
85 HB typical |
| Density |
8.77 g/cm³ |
International Equivalents of CAC402
| Standard |
Designation |
Common Name |
| Japan – JIS H5111 |
CAC402 (formerly BC2) |
Tin Bronze |
| 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) |
Typical Applications
CAC402 tin bronze castings are used for: gears and worm wheels for Japanese-standard machinery, high-load bearings, pump impellers, piston rings, bridge bearings, and industrial machinery components requiring high wear resistance and hardness.
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