British Standard
LG4
Indian Standard
LTB1
Nominal Composition
88/7/2/3
Tensile Strength (kg/mm2)
25-32
Elongation % on 2"
18-25
Brinell Hardness
70-85
Typical Uses
Railway bearings, engine components, tractor parts and pressure components
Name
Gun Metal
BS
LG4
Element
Min
Max
%
%
Copper
Rem
-
Tin
6.00
8.00
Zinc
1.70
3.20
Lead
2.70
3.50
Phosphorous
-
0.02
Nickel
-
2.00
Iron
-
0.20
Aluminium
-
0.01
Manganese
-
-
Antimony
-
0.25
Iron + Arsenic
-
0.15
Impurities
-
0.70