Germany · DIN

C 22.8

DIN 17243:1987 — Weldable heat resisting steel forgings and rolled or forged steel bars; technical delivery conditions

Chemical composition

wt% · log scale
0.010.1110C0.18 – 0.23Cr0.3Mn0.4 – 0.9P0.035S0.03Si0.4
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≤230 MPaTensile strength Rm≤410 MPaImpact energy Kv/Ku≤31 JElongation A≤23 %Yield strength Rp0.2≤230 MPaTensile strength Rm≤410 MPaImpact energy Kv/Ku≤44 JElongation A≤25 %bars, forgings, Heat treated, 105 < d <= 225 mmYield strength Rp0.2≤210 MPaTensile strength Rm≤400 MPaImpact energy Kv/Ku≤27 JElongation A≤21 %Yield strength Rp0.2≤210 MPaTensile strength Rm≤400 MPaImpact energy Kv/Ku≤40 JElongation A≤25 %bars, forgings, Heat treated, 225 < d <= 375 mmYield strength Rp0.2≤200 MPaTensile strength Rm≤400 MPaImpact energy Kv/Ku≤27 JElongation A≤21 %Yield strength Rp0.2≤200 MPaTensile strength Rm≤400 MPaImpact energy Kv/Ku≤40 JElongation A≤25 %bars, forgings, Heat treated, 375 < d <= 750 mmYield strength Rp0.2≤240 MPaTensile strength Rm≤410 MPaImpact energy Kv/Ku≤31 JElongation A≤23 %Yield strength Rp0.2≤240 MPaTensile strength Rm≤410 MPaImpact energy Kv/Ku≤44 JElongation A≤25 %bars, forgings, Heat treated, 60 < d <= 105 mm

Chemical composition

ElementminmaxSimilarRemarks
C0.180.23
Cr0.3
Mn0.40.9
P0.035
S0.03
Si0.4

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
bars, forgings, Heat treated, 105 < d <= 225 mm≤230≤410≤23；≤25≤31；≤44
bars, forgings, Heat treated, 225 < d <= 375 mm≤210≤400≤21；≤25≤27；≤40
bars, forgings, Heat treated, 375 < d <= 750 mm≤200≤400≤21；≤25≤27；≤40
bars, forgings, Heat treated, 60 < d <= 105 mm≤240≤410≤23；≤25≤31；≤44
bars, forgings, Heat treated, d <= 60 mm≤250≤410≤23；≤25≤31；≤44