105/4 , 131/3 YELLOW RING
1.Wrought alloy of aluminium
2.soft brass (Ms63 long chipping)
3.wrought alloy of magnesium
4.aluminium cast alloy Si < 5%,
5.red brass
6.phosphor bronze
7.copper
8.structural steels up to 1000 N/mm2,
9.freecutting steels