S235 / Equivalents

Is it really S235? 4 “equivalents” checked

Cross-reference tables pair grades by name and history. Here each pairing is judged on the minimum values each standard guarantees, with the sources for both sides.

Close match

Same strength class; guaranteed values agree within a few MPa. Still check thickness bands and impact quality.

Q235BSAC (GB)

Approximate

Same class of steel, but at least one guaranteed value is lower or tested differently. Recheck the design.

SS400JIS
A36ASTM
E250BIS

Not equivalent

Commonly listed as an equivalent, but the guaranteed values do not support substitution.

Side by side

Grade	Standard	Min. yield at 10 mm	Tensile at 10 mm	Match	What differs
S235	EN 10025-2:2019	≥ 235MPa4	360–510MPa4	—	Reference grade.
Q235B	GB/T 700	≥ 235MPa3	370–500MPa3	Close match	Same yield steps (235/225/215 MPa) and impact qualities; tensile 370–500 MPa vs 360–510.
SS400	JIS G 3101	≥ 245MPa2	400–510MPa2	Approximate	Higher yield (245 MPa ≤ 16 mm) and tensile (400–510 MPa), but no impact test and almost no chemistry limits: not for welded primary structures.
A36	ASTM A36/A36M	≥ 250MPa3	400–550MPa3	Approximate	Yield 250 MPa (36 ksi), between S235 and S275; tensile 400–550 MPa. No impact test unless ordered.
E250	IS 2062:2011	≥ 250MPa1	≥ 410MPa1	Approximate	Yield 250 MPa, tensile ≥ 410 MPa; impact qualities BR (room temperature) and B0 (0 °C).