SM490B steel plate properties and heat treatment

SM490B steel plate properties and heat treatment

SM490B steel plate technical standard JISG 3106-2004.

Melting analysis of chemical composition of SM490B steel plate:

Grade Thickness C Si Mn P S
SM490B t≤50mm ≤0.18 ≤0.55 ≤1.65 ≤0.035 ≤0.035
50<t≤200mm ≤0.20

Mechanical properties, yield tensile strength of SM490B steel plate:

Grade Yield point or yield strength,N/m㎡ Tensile strength Elongation
Thickness mm Thickness mm Thickness mm %
≤16 16<t≤40 40<t≤75 75<t≤100 100<t≤160 100<t≤200 ≤100 100<t≤200
SM490B ≥325 ≥315 ≥295 ≥295 ≥285 ≥275 490-610 490-610 ≤5 ≥22
5<t≤16 ≥17
5<t≤50 ≥21
>40 ≥23

SM400B steel plate heat treatment:
On request, the steel can be normalized, quenched and tempered or tempered.

Heat treatment mark:
When the steel is heat treated, the code indicating the heat treatment shall be in accordance with the following provisions.
a) When normalizing steel: N
b) When tempering steel: T
c) When quenching and tempering steel: Q
d) Controlled rolling of steel: TMC