Name: S355G7+M S355G8+M High Strength Alloy Steel
Brand: GNEE
SKU: 227910999

Description

Technical Parameters

S355G7+M S355G8+M High Strength Alloy Steel

S355G7+M plate is a high-strength structural steel used as a structural component in offshore and marine buildings. According to the European Standard EN 10225, S355G7 refers to a steel with a minimum yield strength of 355 MPa, and the suffix "+M" indicates that it has been heat treated (controlled rolling, normalising/water-cooled quenching) to provide improved weldability and corrosion resistance.

S355G8+M steel plate -40 ℃ impact, fixed offshore frame with welded structural steel, "S" for structural steel, "355" for the lower yield strength of the plate, G8 indicates the relevant number of steel grade characteristics, M is hot rolled or TMCP delivery state. S355G8+M steel plate has excellent mechanical properties, welding properties, process performance, suitable for the manufacture of ocean and offshore oil platforms, terminal equipment and other structural components.

S355G7+M low alloy steel chemical composition

C	Si	Mn	P	S	Cr	Mo	Ni	Al	Cu	N	Nb	Ti	V	Nb+V
0.14	0.15-0.55	1.0-1.65	0.02	0.01	0.25	0.08	0.5	0.015-0.055	0.3	0.01	0.04	0.025	0.06	0.06

S355G8+M high strength low alloy steel chemical composition

Grade	C	Si	Mn	P	S	Ni	Cr	Mo	Cu
S355G8+M	≤0.14	0.15-0.55	1-1.65	≤0.02	≤0.007	≤0.5	≤0.25	≤0.08	≤0.3
Nb	V	Ti	Alt	N	B	Ca	Pb	Ceq Max	Pcm Max
≤0.04	≤0.06	≤0.025	0.015-0.055	≤0.010	≤0.0005	≤0.005	≤0.010	≤0.43	≤0.24

S355G7+M high strength low alloy hSLA steel mechanical property

Grade	Mechanical Properties (min) unless stated
	Tensile Strength		Yield Strength						Elongation A
	Thickness (mm)		Thickness t - mm						Elongation A
	≤100	>100	≤16	16<t≤25	25<t≤40	40<t≤63	63<t≤100	100<t≤150	%
S355G7+M	470/630	–	355	355	345	335	325	–	22

S355G8+M high strength steel mechanical property

Grade	Tensile strength Mpa	Lower yield strength of corresponding thickness (mm), MPa					Elongation A%	Impact energy
Grade	Thk≤100mm	≤16	16-25	25-40	40-63	63-100	Elongation A%	Temperature ℃	Energy J
S355G8+M	470-630	355	355	345	335	325	22	-40	50