CC 493K / Rg7

Gunmetal, Red Bronze etc.

Rg7 is the most common bronze alloy worldwide. The material properties makes this alloy well suited for bearings, valves, slideplates and similar products. Pressure-tight with good dry running properties and easy to machine simply makes this an excellent all around bronze alloy.

Areas of use
LM & LMF standard bearings, sliding parts, valves, pump housings, water and steam fittings <225°C, and much more.

Delivery program
Solid round bar, tube, square, flat and hexagon bars.



Chemical composition (nom.)
– Cu 81-85%
– Sn 6-8%
– Pb 5-8%
– Zn 2-5%

Max impurities
– Ni 2.0 (can be part of the Cu-content)
– Mn 0.2%
– P 0.05%
– Sb 0.2%
– S 0.1%
– Other 0.1%

Mechanical properties
Yield strength (Rp N/mm²): ≥ 120 N/mm²
Tensile strength (Rm N/mm²): ≥ 260 N/mm²
Elongation in % A5: ≥ 12%
Hardness/Brinell: ≥ 70 HB
Density ∼ 8.8
Mating material: Min. surface hardness 200HB. Rec. surface roughness < 1 Ra

Characteristics                                                                                                             The material is not suitable for welding (lead content). The material is suitable for soldering and brazing. The material is also suitable for bonding.

Additional information