CuSn7Zn2Pb3-C / CuSn7Zn2Pb3-B, (CC492K / CB492K)
| Common name | Material description | World specifications |
||
|---|---|---|---|---|
| European | British | American | ||
| Leaded tin bronze | CuSn7Zn2Pb3-C / CuSn7Zn2Pb3-B | CC492K / CB492K (EN 1982) | LG4 (BS 1400) | C92400 |
Other name: NES 838, C92410A, 2.1052.03.
The equivalence between the standards is not absolute and some variations in composition can exist.
Chemical Composition in %, (EN 1982:2017, Castings)
| Cu* | Sn** | Pb | Zn | Ni** | Al | Fe | Mn | P | S | Si | Sb | As | Cr | Bi | Cd | Se | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 85.0 | 6.0 | 2.5 | 1.5 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Max | 89.0 | 8.0 | 3.5 | 3.0 | 2.0 | 0.01 | 0.2 | - | 0.10 | 0.10 | 0.01 | 0.25 | - | - | - | - | - |
* Including nickel.
** (Sn +1/2 Ni) content shall be in the range 7.0% to 8 %.
Chemical Composition in %, (EN 1982:2017, Ingots)
| Cu* | Sn** | Pb | Zn | Ni** | Al | Fe | Mn | P | S | Si | Sb | As | Cr | Bi | Cd | Se | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 85.0 | 6.2 | 2.7 | 1.7 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Max | 88.5 | 8.0 | 3.5 | 3.2 | 2.0 | 0.01 | 0.20 | - | 0.03 | 0.08 | 0.01 | 0.25 | - | - | - | - | - |
* Including nickel.
** (Sn +1/2 Ni) content shall be in the range 7.0% to 8 %.
Mechanical Properties (EN 1982:2017, Continuous castings)
| Rm | Tensile strength min. | 270 N/mm2 |
| Rp0.2 | Proof Strength min. | 130 N/mm2 |
| A | Elongation min. | 12 % |
| HB | Brinell hardness min. | 70 HBW |
Properties:
- material with good stability and expansion,
- good for casting,
- sea water resistant.
Application:
- bearings of cranes and elevators;
- minor machine tool bearings;
- piston pin bushes for load up to 50N/mm2;
- bearing for packing machines and electric motors;
- general bearing in mechanical engineering;
- valve and gate seat rings;
- guide bushes in hydraulic cylinders;
- slip rings.