Is mild steel ASTM A36 equivalent to S275JR carbon steel

Is mild steel ASTM A36 equivalent to S275JR carbon steel? This is a frequently received consultation. For any steel material, it can not bypass its chemical composition and mechanical properties to talk about the performance of the steel and judge its adaptability.

Is mild steel ASTM A36 equivalent to S275JR carbon steel? Let us check from point of chemical composition:

Grade	C (t≤16mm)	Si	Mn	P	S	Cu	N
A36	0.26 max	0.40 max	-	0.04 max	0.05 max	0.20 min	-
S275JR	0.24 max	-	1.60 max	0.045 max	0.045 max	0.60 max	0.014 max

It is easily to find that their chemical composition is not same, even difference is not much big. So is mild steel ASTM A36 equivalent to S275JR carbon steel? It hard to tell only depending on their chemical composition. Let us continue to make contrast.

Mechanical properties of mild steel ASTM A36 and S275JR carbon steel:

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
Grade	Yield strength ReH/(N/mm2) (t≤16mm) min	Tensile strength Rm/(N/mm2) (3mm≤t≤16mm)	Elongation A/% (3mm≤t≤40mm) min	Temperature/℃	Impact energy (Longitudinal)/J min
A36	250	400-550	23	-	-
S275JR	275	410-560	23	20	27

Both yield strength and tensile strength of S275JR carbon steel is higher than that of mild steel ASTM A36. So S275JR carbon steel can bear heavier load than mild steel ASTM A36. In other word, mild steel ASTM A36 is not equivalent to S275JR carbon steel.

So what is mild steel ASTM A36 equivalent? It is EN S235JR, DIN ST37-2, JIS SS400, GB Q235B, etc.

Are you also interested in further steel processing (machining)?

Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!

Fabrication and Machining Service 24h Technical support