India · IS

07Cr4Mo6

IS 4367:1991 — IS 4367

Chemical composition

wt% · log scale
0.00010.0010.010.1110Al0.02 – 0.05B0.0003C0.12Cr0.7 – 1.1Cr+Mo+Ni0.5Cu0.25Cu+Sn0.5Mn0.4 – 0.7Mo0.45 – 0.65Ni0.3P0.03S0.03Si0.15 – 0.6Sn0.05V0.05
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥225 MPaTensile strength Rm380–550 MPaImpact energy Kv/Ku≥60 JElongation A≥19 %forgings, normalized and tempered, 40 mmHardnessHBforgings, soft annealed

Chemical composition

ElementminmaxSimilarRemarks
Al0.020.05When the steel is Al killed.
B0.0003
C0.12
Cr0.71.1
Cr+Mo+Ni0.5Trace elements
Cu0.25
Cu+Sn0.5Cu + 10 x %Sn
Mn0.40.7
Mo0.450.65
Ni0.3
P0.03P max.=0.035%
S0.03S: 0.02-0.035%
Si0.150.6
Sn0.05
V0.05

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
forgings, normalized and tempered, 40 mm≥225380–550≥19 Lo = 5.65√So≥60 Izod impact value
forgings, soft annealedHB ≤170