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ASTM A36 steel equivalent grade steel plate

ASTM A36 steel is very popular in the construction field. Q235B, A283C, S235JR, ST37-2, Ss400 steel grades are ASTM A36 steel equivalent grades.

To be ASTM A36 steel equivalent grade, the steel material should have similar chemical composition and mechanical properties to ASTM A36 steel. So that the ASTM A36 steel equivalent grade can play close performance to ASTM A36 steel.

ASTM A36 steel equivalent grade chemical composition:

Grade  C  (t≤16mm) Si Mn P S Cu N
Q235B 0.20 max 0.35 max 1.40 max 0.045 max 0.045 max - -
A36 0.26 max 0.40 max - 0.040 max 0.050 max 0.20 min -
A283C 0.24 max 0.04 max 0.09 max 0.035 max 0.040 max 0.20 min -
S235JR 0.19 max - 1.5 max 0.045 max 0.045 max 0.60 max 0.014 max
ST37-2 0.21 max - - 0.065 max 0.065 max - 0.010 max
SS400 - - - 0.050 max 0.050 max - -

ASTM A36 steel equivalent grade mechanical properties:

Grade Yield strength ReH/(N/mm2)
(t≤16mm) min
Tensile strength Rm/(N/mm2) (3mm≤t≤16mm) Elongation A/%
(3mm≤t≤40mm) min
Charpy V test
Temperature/℃ Impact energy (Longitudinal)/J min
Q235B 235 370-500 26 20 27
A36 250 400-550 23 - -
A283C 205 380-515 25 - -
S235JR 235 360-510 26 20 27
ST37-2 235 360-510 26 20 27
SS400 245 400-500 21 - -

From above table, we can find that Q235B, A283C, S235JR, ST37-2, SS400 etc. ASTM A36 steel equivalent grades have close chemical composition and mechanical properties to ASTM A36 steel. In most projects, they can be used to instead each other. But for some special applications, you need choose among A36 and ASTM A36 steel equivalent grades carefully. The tiny chemical composition and mechanical properties difference may generate big difference in some special evironment.

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