S355g7+M and S355g7+N both are structural steel plate grades and mainly used in offshore industry. S355g7+M means thermo-mechanically rolled and S355g7+N means normalised steel plate. These both S355g7+M / N structural steel plate offers good tensile and yield strength and supplied as per EN10225:2001 standard. These S355g7+M and S355g7+N Plate are used to build offshore platforms in offshore industries.
The material can be supplies as S355G7+N (N=Normalized) or SG355G7+M (M=Thermo-Mechanically Rolled).
Nearest Equivalent Grade : API 2H Grade50; API 2W Grade50; API 2W Grade50T, BS7191:1989 355EM; Werkstoff 1.8808+N;1.8808+M
Technical Requirements & Additional Services:
Standard | EN 10225 S355g7+M / S355g7+N |
S355g7+M Plate Rolling Type | Oil and offshore platform steel plate |
Thickness of S355g7+M Plate | 6mm-300mm |
S355g7+M Plate Width | 1500mm-4200mm |
Length | 3000mm-18000mm |
Heat Treatment | Normalized / Drawing-back |
Technique | Hot Rolled |
Grade | S355g7+M / S355g7+N |
Number | 1.8808 |
Classification | Alloy quality steel |
Density | 7.85 g/cm ³ |
Standard | EN 10225: 2009 Weldable structural steels for fixed offshore structures. Technical delivery conditions |
Equivalent grades of steel S355G7 (1.8808)
EU EN |
USA - |
England BS |
S355G7 | 2HGr.50, 2WGr.50/50T | 355EM |
S355G7+M;S355G7+N Mechanical Properties
Grade | Mechanical Properties (min) unless sated | Tensile Strength Rm MPa | |||||||
---|---|---|---|---|---|---|---|---|---|
Tensile Strength | Nominal Thickness (mm) | ||||||||
Thickness (mm) | Elongation A | ||||||||
< 100 | >100 | <16 | >16 <25 | >25 <40 | >40 <63 | >63 <100 | >100 <150 | % | |
S355G7+M | 470/630 | - | 355 | 355 | 345 | 335 | 325 | - | 22 |
S355G7+N | 470/630 | 460/620 | 355 | 355 | 345 | 335 | 325 | 320 | 22 |
Minimum Yield Strength / Mpa | Tensile Strength/Mpa | Minimum Average Xharpy-V Impact Energy/J@-40ºC |
---|---|---|
t ≤ 16 mm 355 16 < t ≤ 25 mm 355 25 < t ≤ 40 mm 345 40 < t ≤ 63 mm 335 63 < t ≤ 100 mm 325 120 < t ≤ 150 mm 320 (+N only) |
t ≤ 100 mm 470 - 630 (5.65√s°) / % |
50
mid-thickness test also required for t > 40mm |
(1) Other restrictions apply beyond those shown
EN 10225 : S355 Grades Chemical Composition (ladle and product analysis / wt%)(1)
C max. |
Si | Mn | S max. |
P max. |
Cr max. |
Mo max. |
Nb max. |
V max. |
Ti max. |
Ni max. |
Cu max. |
Al(tot) | N max. |
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
S355G7+M S355G7+N |
0.14 | 0.15/ 0.55 |
1.00/1.65 |
0.01 | 0.02 | 0.25 | 0.08 | 0.04 | 0.06 | 0.025 | 0.5 | 0.3 | 0.015/ 0.055 |
0.01 |
S355G8+M S355G8+N |
0.14 | 0.15/ 0.55 |
1.00/1.65 | 0.007 | 0.02 | 0.25 | 0.08 | 0.04 | 0.06 | 0.025 | 0.5 | 0.3 | 0.015/ 0.55 |
0.01 |
S355G9+M S355G9+N |
0.12 | 0.15/ 0.55 |
1.65max. | 0.01 | 0.02 | 0.2 | 0.08a | 0.03 | 0.06 | 0.025 | 0.7b | 0.3 | 0.015/ 0.55 |
0.01 |
S355G10+N S355G10+M |
0.12 | 0.15/ 0.55 |
1.65max. | 0.005 | 0.015 | 0.2 | 0.08a | 0.03 | 0.06 | 0.025 | 0.7b | 0.3 | 0.015/ 0.55 |
0.01 |
a.For t > 75 mm maximum Mo of 0.20% shall apply for +M condition.
b.For t > 40 mm the minimum Ni content shall be 0.30%.
S355g7+M Sizes | Weight in Kg's per each | |||||||
---|---|---|---|---|---|---|---|---|
4.5 | 5.0 | 6.0 | 8.0 | 10 | 12 | 16 | 20 | |
S355g7+M 2000 x 1000 | 70.65 | 78.50 | 94.20 | 125.60 | 157.00 | 188.40 | 251.20 | 314.00 |
S355g7+M 2500 x 1200 | 105.98 | 117.75 | 141.30 | 188.40 | 235.50 | 282.60 | 376.80 | 471.00 |
S355g7+M 3000 x 1500 | 158.96 | 176.63 | 211.95 | 282.60 | 353.25 | 423.90 | 565.20 | 706.50 |
S355g7+M 4000 x 2000 | 282.60 | 314.00 | 376.80 | 502.40 | 628.00 | 753.60 | 1004.80 | 1256.00 |
S355g7+M 8000 x 2000 | 565.20 | 628.00 | 753.60 | 1004.80 | 1256.00 | 1507.20 | 2009.60 | 2512.00 |
S355g7+M 10000 x 2000 | 706.5 | 942.00 | 1246.00 | 1256.00 | 1570.00 | 1884.00 | 2512.00 | |
S355g7+M 10000 x 2400 | 942.00 | 1130.40 | 1507.20 | 1884.00 | 2260.80 | 3014.40 | 3768.00 | |
S355g7+M 13000 x 2400 | 1224.60 | 1469.52 | 1959.36 | 2449.20 | 2939.04 | 3918.72 | 4898.40 | |
S355g7+M 12000 x 3000 | 1695.60 | 2260.80 | 2826.00 | 3391.20 | 4521.60 | 5652.00 |
S355g7+M Plate Sizes | Weight in Kg's per each | |||||||
---|---|---|---|---|---|---|---|---|
25 | 30 | 32 | 35 | 38 | 40 | 45 | 50 | |
S355g7+M 2000 x 1000 | 392.50 | 471.00 | 502.40 | 549.60 | 596.60 | 628.00 | 706.50 | 785.00 |
S355g7+M 2500 x 1200 | 588.75 | 706.50 | 753.60 | 824.25 | 894.90 | 942.00 | 1059.75 | 1177.50 |
S355g7+M 3000 x 1500 | 883.13 | 1059.75 | 1130.40 | 1236.38 | 1342.35 | 1413.00 | 1589.63 | 1766.25 |
S355g7+M 4000 x 2000 | 1570.00 | 1884.00 | 2009.60 | 2198.00 | 2386.40 | 2512.00 | 2826.00 | 3140.00 |
S355g7+M 8000 x 2000 | 3140.00 | |||||||
S355g7+M 10000 x 2000 | ||||||||
S355g7+M 10000 x 2400 | 4710.00 | |||||||
S355g7+M 13000 x 2400 | 6123.00 | 5652.00 | 6028.80 | 6594.00 | 7159.20 | 7536.00 | 8478.00 | |
S355g7+M 12000 x 3000 | 7347.60 | 7837.44 |
S355g7+M Plate Sizes | Weight in Kg's per each | |||||||
---|---|---|---|---|---|---|---|---|
300WA | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 |
S355g7+N 2000 x 1000 | 863.50 | 942.00 | 1020.50 | 1099.00 | 1177.50 | 1256.00 | 1334.50 | 1413.00 |
S355g7+N 2500 x 1200 | 1295.25 | 1413.00 | 1530.75 | 1648.50 | 1766.25 | 1884.00 | 2001.75 | 2119.50 |
S355g7+N 3000 x 1500 | 1942.88 | 2119.50 | ||||||
S355g7+N 4000 x 2000 | 3450.00 | 3768.00 | 4082.00 | 4396.00 | 4710.0 | 5024.00 | 5338.00 | 5652.00 |
S355g7+M Plate Sizes | Weight in Kg's per each | |||||||
---|---|---|---|---|---|---|---|---|
300WA | 100 | 110 | 115 | 120 | 125 | 130 | 140 | 150 |
S355g7+M 2000 x 1000 | 1570.00 | 1727.00 | ||||||
S355g7+M 2500 x 1200 | 2355.00 | 2590.50 | 2708.25 | 2826.00 | 2943.75 | 3061.50 | 3297.00 | 3532.50 |
S355g7+M 3000 x 1500 | ||||||||
S355g7+M 4000 x 2000 | 6280.00 | 6908.00 |
Material S355g7+N Plate | EN10225 Grade S355g7+N Offshore platform Steel plate |
Material S355g7+N Steel Plate | EN10225 S355g7+N oil platform steel plate |
En 10225 S355g7+M | S355g7+M Steel Plate |
En 10225 S355g7+M Steel Plate | S355g7+M Plate |
EN10225 Grade S355g7+N drilling platform Steel plate | EN10225 Grade S355g7+N Welding Structural Steel Plate |
S355g7+N | S355g7+N Structural Steel Plate |
Mild Steel Plate S355g7+N | S355g7+N Offshore Structural Steel Plates |
S355g7+N Steel | Mild Steel S355g7+N Material Plate |
En 10225 S355g7+N | S355g7+N Steel Plate |
En 10225 S355g7+N Steel Plate | S355g7+N Plate |
BS en10225 S355g7+N Plate | S355g7+N Sheet |
EN10225 Grade S355g7+N Offshore Structural Steel Plate | S355g7+N En10225 Offshore Structural Steel Plate |
S355g7+M | S355g7+M Structural Steel Plate |
Steel Plate S355g7+M | S355g7+M oil platform steel plate |
Mild Steel Plate S355g7+M | S355g7+M Offshore Structural Steel Plates |
S355g7+M Steel | Mild Steel S355g7+M Material Plate |
Steel Plate S355g7+N | S355g7+N oil platform steel plate |
BS en10225 S355g7+M Plate | S355g7+M Sheet |
Material S355g7+M Plate | EN10225 Grade S355g7+M Offshore platform Steel plate |
Material S355g7+M Steel Plate | EN10225 S355g7+M oil platform steel plate |
EN10225 Grade S355g7+M drilling platform Steel plate | EN10225 Grade S355g7+M Welding Structural Steel Plate |
EN10225 Grade S355g7+M Offshore Structural Steel Plate | S355g7+M En10225 Offshore Structural Steel Plate |
Group | EN 10225:2009 | BS 7191:1989 | |
S355G2+N | 1 | S355G2+N | 355D |
S355G3+N | 1 | S355G3+N | 355E |
S355G5+M | 1 | S355G5+M | 355D |
S355G6+M | 1 | S355G6+M | 355E |
S355G7+N | 2 | S355G7+N | 355EM |
S355G7+M | 2 | S355G7+M | 355EM |
S355G8+N | 3 | S355G8+N | 355EMZ |
S355G8+M | 3 | S355G8+M | 355EMZ |
S355G9+N | 2 | S355G9+N | |
S355G9+M | 2 | S355G9+M | |
S355G10+N | 3 | S355G10+N | |
S355G10+M | 3 | S355G10+M | |
S420G1+M | |||
S420G2+M |
Grade | Minimum thickness (mm) | Maximum thickness (mm) |
S355G2+N | 5 | 20 |
S355G3+N | 40 | |
S355G5+M | 20 | |
S355G6+M | 40 | |
S355G7+N | 80 | |
S355G7+M | 50 | |
S355G8+N | 80 | |
S355G8+M | 50 | |
S355G9+N | 80 | |
S355G9+M | 50 | |
S355G10+N | 80 | |
S355G10+M | 50 | |
S420G1+M | 30 | |
S420G2+M |
Tolerances: in accordance with EN 10029
S355G2+N | Cast | 0.43 | - |
S355G3+N | Cast | 0.43 | - |
S355G5+M | Cast | 0.43 | - |
S355G6+M | Cast | 0.43 | - |
S355G7+N | Product | 0.43 | 0.24 |
S355G7+M | Product | 0.43 | 0.24 |
S355G8+N | Product | 0.43 | 0.24 |
S355G8+M | Product | 0.43 | 0.24 |
S355G9+N | Product | (0.43) | 0.22 |
S355G9+M | Product | (0.41) | 0.21 |
S355G10+N | Product | (0.43) | 0.22 |
S355G10+M | Product | (0.41) | 0.21 |
() Non guaranteed indicative values | |||
CEV = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 | |||
PCM = C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5*B |
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