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CuSn7Zn4Pb7-C, RG7

En1982; Din1705

  • Automotive
  • Industrial
  • Machinery

Typical Uses

Automotive Fittings, Fasteners, Washers, Industrial Bearings for Cranes, Trunion Bearings, Roll Neck Bearings, Rolling Mill Bearings, Linkage Bushings for Presses, Fuel Pump Bushings, Water Pump Bushings, Diesel Engine Wrist Pin Bushings, Forging Press Toggle Lever Bearings, Hydraulic Press Stuffing Box, Hydraulic Press Main Lining, Insert Bearings, Bearings, Thrust Washers, Pumps, Bushings, Machine Parts, Pump Impellers, General Purpose Bushings, Fittings, Pump Fixtures, Main Spindle Bearings, Machine Tool Bearings

Square : Up to 153mm
Hollow : 26X14mm - 292X238mm
Round : 10mm-303mm
Hexagonal : Up to 76mm
Rectangle : Up to 303mm W
Bar Length : 3000mm
Product availabillity


Chemical Composition

(%max, unless shown as range or min)

Applicable Specifications


*BS EN 1982

Fabrication Processes

* Continuous Casting

Fabrication Properties

Joining TechniqueSuitability
Oxyacetylene WeldingNot Recommended
Gas Shielded Arc WeldingNot Recommended
Coated Metal Arc WeldingNot Recommended
Machinability Rating70

 Mechanical Properties

Tensile Strength
0.2% Proof Strength
Rp0.2 N/mmmin.
Elongation A % min.Hardness HB min.

Physical Properties

US CustomaryMetric
Melting Point – Liquidus1790 F977 C
Melting Point – Solidus1570 F854 C
Density0.322 lb/in3 at 68 F8.91 gm/cm3 at 20 C
Specific Gravity8.918.91
Electrical Resistivity85.9 ohms-cmil/ft at 68 F14.29 microhm-cm at 20 C
Electrical Conductivity12 %IACS at 68 F0.07 MegaSiemens/cm at 20 C
Thermal Conductivity33.6 Btu · ft/(hr · ft2·°F) at 68 F58.2 W/m ·°K at 20 C
Coefficient of Thermal Expansion10.0·10-6 per °F (68-212 F)18.0·10-6 per °C (20-100 C)
Specific Heat Capacity0.09 Btu/lb/°F at 68 F377.1 J/kg · °K at 20 C
Modulus of Elasticity in Tension14500 ksi100000 MPa