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1. S355G9+M steel plate belongs to high-strength structural steel products with good comprehensive mechanical properties, welding properties and process properties. It is suitable for manufacturing structural parts such as offshore oil production platforms and terminal equipment. The impact of S355G9+M is -40 degrees, and the 9 after G represents the relevant number for the characteristics of the steel. As for the latter, +M means thermomechanical rolling, which is just a method of naming steel numbers in the standard.
2. Chemical composition of S355G9+M steel for offshore platform:
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu |
| ≤0.12 | 0.15-0.55 | ≤1.65 | ≤0.015 | ≤0.005 | ≤0.7 | ≤0.2 | ≤0.08 | ≤0.3 |
| Nb | V | Ti | Alt | N | B | Ca | Pb | |
| ≤0.03 | ≤0.06 | ≤0.025 | 0.015-0.055 | ≤0.010 | ≤0.0005 | ≤0.005 | ≤0.010 |
| Delivery state | Thickness | Mechanical properties | ||
| Hot rolled | ≤16mm | ReH(MPa) | ≥355 | ReH/Rm≤0.93 |
| Rm(MPa) | 470～630 | |||
| A(%) | ≥22 | Horizontal | ||
| Impact temperature(℃) | -40 | |||
| Akv(J) | ≥50 | |||
| Performance description | Delivery state: TMCP | |||
| >16-25mm | ReH(MPa) | ≥355 | ReH/Rm≤0.9 | |
| Rm(MPa) | 470～630 | |||
| A(%) | ≥22 | Horizontal | ||
| Impact temperature(℃) | -40 | |||
| Akv(J) | ≥50 | |||
| Performance description | Delivery state：TMCP | |||
| >25-40mm | ReH(MPa) | ≥345 | ReH/Rm≤0.9 | |
| Rm(MPa) | 470～630 | |||
| A(%) | ≥22 | Horizontal | ||
| Impact temperature(℃) | -40 | |||
| Akv(J) | ≥50 | |||
| Performance description | Delivery state：TMCP | |||
| >40-63mm | ReH(MPa) | ≥335 | ReH/Rm≤0.9 | |
| Rm(MPa) | 470～630 | |||
| A(%) | ≥22 | Horizontal | ||
| Impact temperature(℃) | -40 | |||
| Akv(J) | ≥50 | |||
| Performance description | Delivery state：TMCP | |||
| >63-100mm | ReH(MPa) | ≥325 | ReH/Rm≤0.9 | |
| Rm(MPa) | 470～630 | |||
| A(%) | ≥22 | Horizontal | ||
| Impact temperature(℃) | -40 | |||
| Akv(J) | ≥50 | |||
| Performance description | Delivery state：TMCP | |||
4. Delivery status of S355G9+M steel plate: normalizing, controlled rolling.
GB T 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes are mainly for ship use, also known as shipbuilding steel pipes. Under GB T 5312, there are mainly 5 steel grades: grade 320, 360, 410, 460 and 490. Each grade covers three levels: I, II, III.
Angle steel, commonly known as angle iron, is a long strip of steel whose sides are perpendicular to each other. There are equal angle steels and unequal angle steels. The two sides of equal angle steel are equal in width. The unequal angle steel is also known as L shape profile steel.
Flat bar steel can be produced according to the user's needs, with fixed thickness, width and length. It can reduce the cutting process for users, reduce the consumption of labor and materials, and also reduce the processing loss of raw materials.
Bulb flat steel for shipbuilding
The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.The shipbuilding steel FH40 is the Hull structural steel.We can provide FH40 shipbuilding steel plate price.
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.The shipbuilding steel EH40 is the Hull structural steel.We can provide EH40 shipbuilding steel plate price.
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