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Gunmetal (Copper-Tin-Zinc cast alloys)
DIN 1705 bzw. DIN EN 1982     
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| Alloy | EN number |
Density ca. |
Composition in % of weight |
Properties and use |
| CuSn5Zn5Pb5-C DIN EN 1982 (Rg5) |
CC491K | 8.7 | Cu 83,0 - 87,0 Sn 4,0 - 6,0 Zn 4,0 - 6,0 Pb 4,0 - 6,0 |
Construction material. The main areas of application are water and steam fitting housings up to 255 °C, pump housings and thin-walled, intricate castings and machined parts for mechanical and apparatus engineering and shipbuilding. Is usually replaced as a bearing material with Cu Sn7 Zn4 Pb7-C today. |
| Important tempers |
Tensile Strength Rm N/mm² |
Yield Stress Rp0,2 N/mm² |
Elongation A % |
Hardness HB |
|
| GZ GC |
≥ 250 ≥ 250 |
≥ 110 ≥ 110 |
≥ 13 ≥ 13 |
≥ 65 ≥ 65 |
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| Product with information obligations to REACH-Legislation | |||||
Comparable Specifications:: CuSn5ZnPb, 2.1096, DIN 1705 (Rg 5) C83600 UNS LG2, BS 1400 |
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| Alloy | EN number | Density ca. |
Composition in % of weight |
Properties and use |
| CuSn7Zn4Pb7-C DIN EN 1982 (Rg7) |
CC493K | 8.8 | Cu 81,0 - 86,0 Sn 5,2 - 8,0 Zn 2,0 - 5,0 Pb 5,0 - 8,0 |
Most common, low-budget gunmetal alloy for plain bearings. Still has good dry-running properties and sufficient wear resistance at medium hardness. Also suitable when unhardened shafts and light edge pressure are used. Short-chipping material, good machinability, good corrosion resistance (even in seawater), soft solderable and to a limited extent hard solderable. The main areas of application are plain bearings and bearing bushings for general mechanical engineering.. |
| Important tempers |
Tensile Strength Rm N/mm² |
Yield Stress Rp0,2 N/mm² |
Elongation A % |
Hardness HB |
|
| GZ GC |
≥ 260 ≥ 260 |
≥ 120 ≥ 120 |
≥ 12 ≥ 12 |
≥ 70 ≥ 70 |
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| Product with information obligations to REACH-Legislation | |||||
Comparable Specifications:: CuSn7ZnPb, 2.1090, DIN 1705 (Rg 7) C93200 UNS |
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| Alloy | |
Density ca. |
Composition in % of weight |
Properties and use |
| CuSn10Zn (Rg10) DIN 1705 No longer included in DIN EN 1982 norm. |
2.1086 | 8.7 | Cu 86,0 - 89,0 Sn 9,0 - 11,0 Zn 1,0 - 3,0 Pb ≤ 1,5 |
This hard gunmetal alloy is used for more demanding fittings, plain bearing shells and bushes, also for worm wheels with low sliding speeds. It has only moderate dry-running properties. |
| Important tempers |
Tensile Strength Rm N/mm² |
Yield Stress Rp0,2 N/mm² |
Elongation A % |
Hardness HB |
|
| G | ≥ 260 |
≥ 130 |
≥ 15 |
≥ 75 |
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| Product with information obligations to REACH-Legislation | |||||
Comparable Specifications:: C90500 UNS G 1, BS 1400 |
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We also supply Plain Bearings to DIN 1850.
We supply:
GZ
GC
G resp. GS
GK resp. GM
GC
G resp. GS
GK resp. GM
= Centrifugal casting
= Continuous casting
= Sand casting
= Gravity die casting
= Continuous casting
= Sand casting
= Gravity die casting