Steel

Structural plate, sections and bars to EN, ASTM, JIS, GB, CSA, AS/NZS, IS and GOST.

Standard fromAnywhere

CEN

Mild structural steel

How the S235 equivalents compare

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

Grade	Standard	Yield strength at 10 mm	Tensile strength	Closest to	Evidence
A36 The classic US carbon structural steel: 36 ksi (250 MPa) yield, 58–80 ksi (400–550 MPa) tensile.	ASTM A36/A36M	≥ 250 MPa3	400–550 MPa3	S235Approximate	Confirmed 2 Corroborated 1 Single source 2 Disagreements explained 1

Higher-strength structural steel — the 355 MPa class

How the S355 equivalents compare

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 at 10 mm	Tensile strength	Closest to	Evidence
A572 Grade 50 The common US high-strength structural plate: 50 ksi (345 MPa) yield, 65 ksi (450 MPa) tensile.	ASTM A572/A572M	≥ 345 MPa4	≥ 450 MPa4	S355Approximate	Confirmed 3 Corroborated 4 Single source 2 Disagreements explained 4
A992 The standard US steel for wide-flange beams: 50 ksi (345 MPa) yield, 65 ksi (450 MPa) tensile, Fy/Fu ≤ 0.85.	ASTM A992/A992M	≥ 345 MPa2	≥ 450 MPa2	S355Approximate	Corroborated 4 Single source 2

Hollow sections (SHS, RHS, CHS)

How the S355J2H equivalents compare

Square, rectangular and circular tubes for columns, trusses and frames. Note the different design fu.

Grade	Standard	Yield strength	Tensile strength	Closest to	Evidence
A500 Grade C The usual US HSS grade: 50 ksi (345 MPa) yield shaped, 46 ksi (315 MPa) round, 62 ksi (425 MPa) tensile.	ASTM A500/A500M	≥ 345 MPa2	≥ 425 MPa2	S355J2HApproximate	Corroborated 3 Single source 5
A1085 US HSS with a yield cap: 50–70 ksi (345–483 MPa), 65 ksi (450 MPa) tensile, same for round and shaped.	ASTM A1085/A1085M	345–483 MPa1	≥ 450 MPa1	S355J2HApproximate	Single source 3

Thin-walled steel — coated sheet for cold-formed sections

How the S350GD equivalents compare

Galvanized and metallic-coated sheet, usually 0.4–3 mm, roll-formed into purlins, rails, studs, decking and cladding. Designed to EN 1993-1-3, AISI S100 or AS/NZS 4600. The full-hard grades (S550GD, G550, SS Grade 80) are strong but have almost no elongation.

Grade	Standard	Yield strength	Tensile strength	Closest to	Evidence
A653 SS Grade 33 US galvanized structural sheet: 230 MPa yield, 310 MPa tensile, 20 % elongation in 2 in..	ASTM A653/A653M	≥ 230 MPa2	≥ 310 MPa2		Corroborated 3
A653 SS Grade 37 US galvanized structural sheet: 255 MPa yield, 360 MPa tensile, 18 % elongation in 2 in..	ASTM A653/A653M	≥ 255 MPa2	≥ 360 MPa2		Corroborated 3
A653 SS Grade 40 US galvanized structural sheet: 275 MPa yield, 380 MPa tensile, 16 % elongation in 2 in..	ASTM A653/A653M	≥ 275 MPa1	≥ 380 MPa1		Single source 3
A653 SS Grade 50 Class 1 US counterpart of S350GD: 50 ksi (340 MPa) yield, 65 ksi (450 MPa) tensile for Class 1.	ASTM A653/A653M	≥ 340 MPa2	≥ 450 MPa1	S350GDApproximate	Corroborated 2 Single source 6 Disagreements explained 1
A653 SS Grade 80 US full-hard structural sheet: 80 ksi (550 MPa) yield, 82 ksi (570 MPa) tensile, no elongation requirement.	ASTM A653/A653M	≥ 550 MPa1	≥ 570 MPa1	S550GDClose match	Single source 2 Disagreements explained 1

Reinforcing steel (rebar)

Bars for reinforced concrete. Ductility is the point: the classes differ in how much the bar hardens (Rm/Re) and stretches (Agt) before it breaks.

Grade	Standard	Yield strength	Elongation at maximum force	Evidence
A615 Grade 60 The common US rebar: 60 ksi (420 MPa) yield. Not intended for welding; use A706 where welding or seismic ductility matters.	ASTM A615/A615M	≥ 420 MPa2	pending	Corroborated 2 Single source 1 Disagreements explained 1
A706 Grade 60 US low-alloy weldable rebar for seismic design: yield 60–78 ksi (420–540 MPa), tensile ≥ 80 ksi and ≥ 1.25 × actual yield.	ASTM A706/A706M	420–540 MPa1	pending	Single source 4

Structural bolts

How the Property class 8.8 equivalents compare

Bolt property classes and their US counterparts. Class 8.8: 800 MPa tensile, 0.8 × 800 = 640 MPa yield.

Grade	Standard	Yield strength	Tensile strength	Closest to	Evidence
F3125 Grade A325 US heavy-hex structural bolt: 120 ksi (827 MPa) tensile, 92 ksi (634 MPa) yield. A325 now lives inside F3125.	ASTM F3125/F3125M	≥ 634 MPa2	≥ 827 MPa2	Property class 8.8Close match	Corroborated 2 Single source 1 Disagreements explained 1
F3125 Grade A490 US high-strength structural bolt: 150–173 ksi (1034–1193 MPa) tensile, 130 ksi (896 MPa) yield.	ASTM F3125/F3125M	≥ 896 MPa2	1 034–1 193 MPa2	Property class 10.9Close match	Corroborated 2

Planned groups

Very high-strength plate (S690Q, A514)
Rebar: HRB400/500 (GB 1499.2), 500N (AS/NZS 4671), SD390 (JIS)
Stainless and weathering steel