Italy · UNI

C 21

UNI 6922:1971 — UNI 6922

Chemical composition

wt% · log scale
0.010.11C0.18 – 0.24Mn0.3 – 0.6P0.035S0.035Si0.1
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥235 MPaTensile strength Rm392–471 MPaElongation A≥26 %HardnessHBWires, annealedYield strength Rp0.2≤255 MPaTensile strength Rm≤412 MPaElongation A≤24 %Yield strength Rp0.2≤255 MPaTensile strength Rm≤412 MPaElongation A≤24 %bars, normalized, hot rolledHardness热轧及旋剥Hardness热轧bars, normalized, HBYield strength Rp0.2≤235 MPaTensile strength Rm≤392 MPaElongation A≤26 %bars, annealed, cold drawn

Chemical composition

ElementminmaxSimilarRemarks
C0.180.24
Mn0.30.6
P0.035
S0.035
Si0.1

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
Wires, annealed≥235392–471≥26HB ≤130
bars, normalized, hot rolled≤255≤412≤24
bars, normalized, HB热轧及旋剥 140；热轧 140
bars, annealed, cold drawn≤235≤392≤26
bars, annealed, hot rolled≤235≤392≤26
bars, annealed, HB热轧及旋剥 130；热轧 130；冷拔 130