Q420D steel plate
Q420D steel plate
GB/T1591 Q420 contains five different steel grades as Q420A,Q420B,Q420C,Q420D and Q420E.Structural steel Q420D shall be done impacting test at low temperature minus 20 degree centigrade.Normalised heat treatment suggested to be done for low alloy steel plate Q420D in heavy thickness.
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- Commodity name: Q420D steel plate
GB/T1591 Q420 contains five different steel grades as Q420A,Q420B,Q420C,Q420D and Q420E.Structural steel Q420D shall be done impacting test at low temperature minus 20 degree centigrade.Normalised heat treatment suggested to be done for low alloy steel plate Q420D in heavy thickness.
Chemical Composition
Main chemical elements composition of Q420D C Si Mn P S V Nb Ti Al (min.) Cr Ni 0.20 0.55 1.00-1.70 0.030 0.030 0.02-0.20 0.015-0.060 0.02-0.20 0.015 0.40 0.70 Mechanical Property
Thickness (mm) Q420D ≤ 16 > 16 ≤ 35 > 35 ≤ 50 >50 Yield strength (≥Mpa) 420 400 380 360 Tensile strength (Mpa) 520-680 Key words:- Q420D steel plate
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