India · IS

20C8

IS 1570-2:1979 — IS 1570-2

Chemical composition

wt% · log scale
0.010.1110C0.15 – 0.25Mn0.6 – 0.9P0.055S0.055
  • min – max range
  • typical value

Mechanical properties

value range by condition
Tensile strength Rm440 MPaElongation A24 %bars, heavy plate, sections, hot rolled or normalizedTensile strength Rm≥540 MPaElongation A≥10 %bars, cold drawn, < 20 mmTensile strength Rm≥510 MPaElongation A≥12 %bars, cold drawn, > 20 < 40 mmTensile strength Rm≥470 MPaElongation A≥15 %bars, cold drawn, > 40 < 63 mm

Chemical composition

ElementminmaxSimilarRemarks
C0.150.25
Mn0.60.9
P0.055
S0.055

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
bars, heavy plate, sections, hot rolled or normalized440 520.0024
bars, cold drawn, < 20 mm≥540≥10
bars, cold drawn, > 20 < 40 mm≥510≥12
bars, cold drawn, > 40 < 63 mm≥470≥15
bars, cold drawn, > 63 mm≥430≥18
sheet, strip, cold rolled annealed≤390≤25
sheet, strip, quenched≤500≤16≤55
steel tubes, Cold drawn or Cold drawn and tempered≥520≥42
steel tubes, cold drawn annealed≥220≥370