China · YB

Q620-E

YB/T 4212:2010 — Hot-rolled wide flat for construction

Chemical composition

wt% · log scale
0.0010.010.1110Als0.015B0.004C0.18Cr1Cu0.8Mn2Mo0.3N0.015Nb0.11Ni0.8P0.025S0.02Si0.6Ti0.2V0.12
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥600 MPawide flat 16mm < t ≤ 40mmYield strength Rp0.2≥590 MPaTensile strength Rm690–880 MPaElongation A≥15 %wide flat 40mm < t ≤ 63mmElongation A≥15 %wide flat 63mm < t ≤ 100mmYield strength Rp0.2≥570 MPaTensile strength Rm670–860 MPawide flat 63mm < t ≤ 80mm

Chemical composition

ElementminmaxSimilarRemarks
Als0.015
B0.004
C0.18
Cr1
Cu0.8
Mn2
Mo0.3
N0.015
Nb0.11
Ni0.8
P0.025
S0.02
Si0.6
Ti0.2
V0.12

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
wide flat 16mm < t ≤ 40mm≥600
wide flat 40mm < t ≤ 63mm≥590690–880≥15
wide flat 63mm < t ≤ 100mm≥15
wide flat 63mm < t ≤ 80mm≥570670–860
wide flat t ≤ 16mm≥620
wide flat t ≤ 40mm710–880≥15

High/low temperature

Impact energy Kv/Ku (J)
ConditionTemperature ℃min
wide flats 12mm ≤ t ≤ 150mm-4031