Hungary · MSZ

40CrMoV12

MSZ EN 3972

Chemical composition

wt% · log scale
0.0010.010.1110C0.35 – 0.43Cr3 – 3.5Mn0.4 – 0.7Mo0.8 – 1.1Ni0.3P0.015S0.01Si0.1 – 0.35Sn0.025V0.15 – 0.25
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥1030 MPaTensile strength Rm1250–1400 MPaImpact energy Kv/Ku≥25 JElongation A≥10 %HardnessHBbars, quenched and tempered, <= 100 mmHardnessHBbars, annealed, <= 100 mm

Chemical composition

ElementminmaxSimilarRemarks
C0.350.43
Cr33.5
Mn0.40.7
Mo0.81.1
Ni0.3
P0.015%P+%Sn=0.025
S0.01
Si0.10.35
Sn0.025
V0.150.25

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
bars, quenched and tempered, <= 100 mm≥10301250–1400≥10≥25 Charpy V NotchHB 375–401
bars, annealed, <= 100 mmHB ≤277