Product brief introduction
Machinability is obvious higher than that of Y12, production efficiency 30 ~ 50% higher than that of Y12 steel, especially when tapping, tap life is more than twice higher than that of Y12, 11 smn30 free-cutting steel (1.0715) is often used in the manufacture of standard parts is not important, such as bolts, nuts, pipe joints, spring seat, etc.
Product Parameter
S :0.27~0.33
Pmax :0.11
Technical Equipment
Tensile strength of sigma b (MPa) : (hot rolled) 390 ~ 540;
(cold drawn) steel thickness or diameter of 8 ~ 20:530 ~ 755.
> 20 ~ 30:510 ~ 735;
> 30:490 ~ 490
Elongation delta 5 (%) : (hot rolled) 22 or more;
(cold rolled) 7.0 or higher
Reduction of area bits (%) : (hot rolled) 36 or more
Hardness: (hot rolled) 170 hb or less;
(cold drawn) 152 ~ 217 hb
Low heat treatment specification and metallographic organization:
Low status: delivery to hot rolled or cold drawn state delivery, delivery status should be indicated in the contract.