Case Hardening Steels : 7131

Main Characteristic

7131 is a low alloy steel which come in low carbon content. Suitable for hard surface by carburizing ,
it provide surface hardness at 58-62 HRC. Also, give moderate depth of hardness from surface.
This grade possess manganese and chromium which help hardness ability and strength as well as
wear resistance to be increased.

OutStanding Properties

   High toughness
   High ductility and can be bended
   Resistance to torque
   Resistance to fatigue
   Resistance to abrasive at its surface after carburizing
   Hard surface level are at moderate
   Well machinability


7131 is good to make machinery part which require moderate wear resistance and internal strength such as
secondary gear. Or stable feed gear, drive gear with low rev, bolt , earth drilling tool and abrasive resisance
ball bearing.

Chemical Composition
ส่วนผสมทาง เคมี (%wt.)
สภาพจําหน่าย Selling Condition
สภาพหลังชุบ After Quenching
C Si Mn P S Cr
0.14-0.19 0.10-0.40 1.00-1.30 ≤0.035 0.02-0.04 0.80-1.10
SCM 415 / SCM21
1.7131 / 16MnCr5
อบอ่อน ความแข็ง ≤ 207 HB
ชุบคาร์บูไรซิงค์ 58-62 HRC
7131 คุณสมบัติทั่วไป (General Characteristic)