C93800 Tin Bronze Casting
C93800 Tin Bronze Casting (UNS C93800), known as High Leaded Tin Bronze 78-7-15, contains nominally 78% copper, 7% tin, and 15% lead. The very high lead content gives superior embeddability and conformability for heavily loaded journal bearing applications. Indicative price: US$ 9.80/kilogram (subject to quantity and specification).
C93800 Chemical Composition
| Element |
Min % |
Max % |
| Copper (Cu) |
75.0 |
79.0 |
| Tin (Sn) |
6.3 |
7.5 |
| Lead (Pb) |
13.0 |
16.0 |
| Zinc (Zn) |
— |
0.80 |
| Nickel (Ni) |
— |
0.50 |
| Iron (Fe) |
— |
0.15 |
C93800 Mechanical Properties (Sand Cast – ASTM B584)
| Property |
Value |
| Tensile Strength |
172 MPa (25,000 psi) min |
| Yield Strength |
83 MPa (12,000 psi) min |
| Elongation |
12% min |
| Brinell Hardness |
45 HB typical |
| Density |
9.25 g/cm³ |
| Melting Range |
829–999°C (1525–1830°F) |
International Equivalents of C93800
| Standard |
Designation |
Common Name |
| USA – UNS |
C93800 |
High Leaded Tin Bronze (78-7-15) |
| UK – BS 1400 |
LB2 |
High Leaded Bronze |
| Europe – EN 1982 |
CC496K |
CuPb15Sn7 |
| Germany – DIN |
2.1182 |
CuPb15Sn |
| ISO 1338 |
CuSn7Pb15 |
High Lead Bronze |
| Japan – JIS H5111 |
CAC604 |
High Leaded Bronze |
Typical Applications
C93800 high leaded tin bronze castings are used for: heavily loaded journal bearings, crankshaft and crosshead bearings, diesel engine bearing liners, heavy machinery bearings, and applications subject to shock loading with good embeddability requirements.
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