Compare / S355 vs SM520

S355 vs SM520

EN 10025-2:2019 · Steel

S355

Europe's workhorse structural steel: 355 MPa minimum yield up to 16 mm, 470–630 MPa tensile from 3 to 100 mm.

JIS G 3106 · Steel

SM520

JIS grade whose guaranteed yield actually matches S355: 365 MPa up to 16 mm.

Close matchMatches S355's yield (365 MPa ≤ 16 mm, 355 MPa 16–40 mm) with a higher tensile range, 520–640 MPa.

Mechanical

Property	Condition	S355	SM520	Difference
Yield strength ReH	t = 16 mm	≥ 355MPa3	≥ 365MPa1	+2.8 %
	t = 40 mm	≥ 345MPa3	≥ 355MPa—	+2.9 %
Tensile strength Rm	t = 3 mm	510–680MPa3	520–640MPa2	+2.0 %
	t = 100 mm	470–630MPa5	520–640MPa2	+11 %
	t = 150 mm	450–600MPa2	520–640MPa2	+16 %
	t = 250 mm	450–600MPa1	520–640MPa2	+16 %
	t = 400 mm	450–600MPa1	520–640MPa2	+16 %

Rows are matched by condition (thickness band, temperature, product form). A dash means the grade has no sourced value for that condition. Differences are SM520 relative to S355; for ranges the lower bound is compared.