Alloy Steel: 20CrMo

Applicationt: 

all kind

Production Description:

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 carburizingparts, such as gears, shafts and so on.
Chemical Composition:
C: 0.17 ~ 0.24,  Si: 0.17 ~ 0.37,  Mn: 0.40 ~ 0.70,  S: 0.035
P: 0.035,  Cr: 0.80 ~ 1.10,  Ni: 0.030, Cu: 0.030,  Mo: 0.15 ~ 0.25
Mechanical Properties:
Tensile strength b (MPa): 885 (90)
Yield strength s (MPa): 685 (70)
Elongation 5 (%): 12
Reduction of area (%): 50
Impact energy Akv (J): 78
Impact toughness kv (J/cm2): 98 (10)
Hardness: 197HB
Sample size: 15mm
Heat Treatment Specification: quenching 880 , water, oil cooling; tempering 500 , water, oil cooling.