EN 10225 1.8803 + M Introduce
EN 10225 1.8803 + M steels were developed primarily for use in the offshore oil and gas industry and is used extensively within the industry due to their excellent fabrication properties. The steels are well-suited to fabrication and welding and have good cold workability characteristics enabling section sizes to be reduced and weight savings to be achieved. Opportunities for cost reduction can also be achieved by eliminating mechanical properties welding, for example the non-standard welding preparations and greater welding speed due to lower heat inputs.
Smelting temperature:1684°C - 1941°C
Application:Weldable structural steel with fixed offshore structure - Technical delivery conditions
EN 10225 1.8803 + M Material Mechanical Properties
EN 10225 1.8803 + M steel is also highly tough, meaning it can resist energy-absorbing impacts without incurring structural damage. This is due to a combination of its ductile properties and high yield strength. The combination of these properties makes EN 10225 1.8803 + M steel capable of withstanding impact forces with minimal damage.
The mechanical properties of the EN 10225 1.8803 + M steel are as follows:
| YieldRp0.2 | ≤ 944 (MPa) |
| TeileRm | ≤ 144 (MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 431 |
EN 10225 1.8803 + M Material Thermal Properties
The thermal performance parameters of the EN 10225 1.8803 + M steel are as follows:
| Temperature (°C) | 13 | 543 | 932 |
| Modulus of elasticity (GPa) | - | 161 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 133 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 241 |
| Poisson’s coefficient, ν | - | - | 244 |
EN 10225 1.8803 + M Material Machining Technology
The main advantages of using EN 10225 1.8803 + Ms are as follows:
• Excellent weldability
• Enhanced fatigue performance
• Improved sectional properties which allows analysis of smaller components with less material
• Reduction in fabrication and welding costs
• Enhanced corrosion resistance compared with traditional carbon-manganese steels
• High strength, good toughness and impact resistance
• Good cold workability
• Improved fracture toughness