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 |
|||||||
Thickness (mm) |
Thickness t - mm |
||||||||
≤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 |
|||||
Thk≤100mm | ≤16 | 16-25 | 25-40 | 40-63 | 63-100 | Temperature ℃ | Energy J | ||
S355G8+M | 470-630 | 355 | 355 | 345 | 335 | 325 | 22 | -40 | 50 |
high strength low alloy steel plate Products image
GNEE group team photo
GNEE group customer visit
GNEE Group participates in Vietnam exhibition
We guarantee the quality and quantity of S355G7+M S355G8+M High Strength Alloy Steel. If you would like more information, please contact us!
Hot Tags: s355g7+m s355g8+m high strength alloy steel, China s355g7+m s355g8+m high strength alloy steel manufacturers, suppliers, factory, S420N S420NL High Strength Low Alloy Plates, S500Q S550Q High Strength Sheet Metal, S355G9 M S355G10 M HSLA Steel Plate, High Tensile Steel Plate, high tensile steel sheet, S355 Round Bar