Standard: GB / T 3077-1988
Features and application: a high hardenability, non-temper brittleness, very good weldability, cold crack formation tendency of small, machinability and good cold plastic strain. Usually quenched and tempered or case hardening state used for the manufacture of corrosive media and in non-working temperature lower than 250 ℃, the medium containing a mixture of nitrogen and hydrogen in the high pressure of work and a variety of fasteners, higher carburizing parts, such as gears, shafts and so on.
Features and application: a high hardenability, non-temper brittleness, very good weldability, cold crack formation tendency of small, machinability and good cold plastic strain. Usually quenched and tempered or case hardening state used for the manufacture of corrosive media and in non-working temperature lower than 250 ℃, the medium containing a mixture of nitrogen and hydrogen in the high pressure of work and a variety of fasteners, higher carburizing parts, such as gears, shafts and so on.