Standard: GB / T 3077-1999

[Main features]

This is a high strength quenched and tempered carbon manganese steel, which has high strength, elasticity and abrasion resistance, and higher hardenability, quenching in oil, the critical diameter of 10 ~ 28mm, the critical quenching in water diameter 24 ~ 49mm, cutting can still be. The quenched and tempered steel available after high mechanical properties, but the heat treatment time and temper embrittlement susceptibility of over-heating, water quenching, also have a tendency to crack, and the dialogue point sensitivity, poor welding, cold plastic deformation is low.

[Application Examples]

This steel is usually used after the conditioning, for the manufacture of high stress and work under conditions of wear and tear parts, manufacturing parts under 80mm diameter steel and 45Cr similar performance; can also be used after normalizing and tempering, for the manufacture of medium load, cross-sectional dimensions larger parts. For example: heavy machinery used for rolling bearings in the spindle axis and the large gear; car driving on the spline shaft and shock loading of the spindle; general machinery used for gears, worm, gear shaft, crankshaft, connecting rod and so on. In addition, this can also be used to produce steel plate spring and the flat coil springs and so on.