British Standard G1
Indian Standard Grade I
Nominal Composition 88/10/2
Tensile Strength (kg/mm2) 26-64
Elongation % on 2" 15-25
Brinell Hardness 70-95
Typical Uses

Pressure tight bearings, bushes, pumps and pump fittings, valves, valve bodies, and valve guides under corrosive marine conditions.

Name Gun Metal
BS G1
Element Min Max
  % %
Copper Rem -
Tin 9.70 10.50
Zinc 1.75 2.75
Lead - 1.50
Phosphorous - 0.02
Nickel - 1.00
Iron - 0.15
Aluminium - 0.01
Manganese - -
Antimony - -
Iron + Arsenic - -
Impurities - 0.50