International Standard

GUN METAL :

BS 1400 – LG2
BS 1400 – LG4
IS 318 – LTB2
JIS – BC6
DIN – RG5
EN – C8491K

BRONZE :

ASTM B62 C83600
ASTM C 54400

NIKEL ALUMINIUM BRONZE :

BS 1400 – AB2
ASTM 148 C 95800
NES 747-2