Compare / SM520 vs S355

SM520 vs S355

JIS G 3106 · Steel

SM520

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

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.

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	SM520	S355	Difference
Yield strength ReH	t = 16 mm	≥ 365MPa1	≥ 355MPa3	−2.7 %
	t = 40 mm	≥ 355MPa—	≥ 345MPa3	−2.8 %
Tensile strength Rm	t = 3 mm	520–640MPa2	510–680MPa3	−1.9 %
	t = 100 mm	520–640MPa2	470–630MPa5	−9.6 %
	t = 150 mm	520–640MPa2	450–600MPa2	−13 %
	t = 250 mm	520–640MPa2	450–600MPa1	−13 %
	t = 400 mm	520–640MPa2	450–600MPa1	−13 %

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