Steel

Minimum yield 235–300 MPa. Ordinary carbon steel, easy to weld, cut and form — and its counterparts in other countries.

Grade	Standard	Yield strength	Tensile strength	Closest to	Evidence
E250 India's general structural steel: 250 MPa yield, 410 MPa tensile, 23 % elongation.	IS 2062:2011	≥ 250 MPa1	≥ 410 MPa1	S235Approximate	Single source 8

S355 and every grade the world lists against it, compared on what each standard guarantees. Some “equivalents” fall short; their yield shows it.

Grade	Standard	Yield strength	Tensile strength	Closest to	Evidence
E350 Indian structural grade: 350 MPa yield, 490 MPa tensile, 22 % elongation.	IS 2062:2011	≥ 350 MPa1	≥ 490 MPa1	S355Approximate	Single source 9