EN 10225 S355G14 Steel – Normalized or Normalized Formed (+N) for Offshore Structures
The standard is applicable to steels for offshore structures, designed to operate in the offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process equipment, process piping, and other utilities. It is primarily applicable to the North Sea Sector, but may also be applicable in other areas provided that due consideration is given to local conditions e.g. temperature.
Properties
General
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 23.0 °C | 7.8 - 7.9 g/cm³ | Typical for Medium Carbon Steel |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 200 - 215 GPa | Typical for Medium Carbon Steel |
Elongation | 20.0 °C | 22 % | |
Poisson's ratio | 23.0 °C | 0.29 [-] | Typical for Medium Carbon Steel |
Shear modulus | 23.0 °C | 75 - 80 GPa | Typical for Carbon Steel |
Tensile strength | 20.0 °C | 460 - 620 MPa | |
Yield strength | 20.0 °C | 345 - 355 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.32E-5 1/K | Typical for Medium Carbon Steel |
Max service temperature | 500 °C | Typical for Carbon Steel | |
Melting point | 1380 - 1514 °C | Typical for Medium Carbon Steel | |
Specific heat capacity | 23.0 °C | 470 - 520 J/(kg·K) | Typical for Medium Carbon Steel |
Thermal conductivity | 23.0 °C | 21 - 52 W/(m·K) | Typical for Medium Carbon Steel |
Electrical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Electrical resistivity | 23.0 °C | 1.43E-7 - 1.74E-7 Ω·m | Typical for Carbon Steel |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.06 % |
Antimony | 0.01 % |
Arsenic | 0.03 % |
Bismuth | 0.01 % |
Boron | 1E-3 % |
Calcium | 5E-3 % |
Carbon | 0.18 % |
Chromium | 0.25 % |
Copper | 0.35 % |
Lead | 0.01 % |
Manganese | 1.6 % |
Molybdenum | 0.08 % |
Nickel | 0.3 % |
Niobium | 0.05 % |
Nitrogen | 0.01 % |
Phosphorus | 0.03 % |
Silicon | 0.15 - 0.55 % |
Sulfur | 0.01 % |
Tin | 0.02 % |
Titanium | 0.02 % |
Vanadium | 0.1 % |
Metal
- EN 10225 S355G7 Steel – Normalized or Normalized Formed (N) for Superior Workability and Weldability
- EN 10225 S355G8 Steel – Normalized or Normalized-Formed (+N) Grade
- EN 10216-2 Grade 8MoB5-4 (Normalized/Normalized Formed +N): High‑Temperature Seamless Tubes for Boilers, Pipelines & Pressure Vessels
- DIN 17103 TStE 500: High‑Strength Steel for Extreme Conditions
- DIN 17103 WStE 460 Steel: Normalized & Normalized Formed (+N) for High-Temperature Applications
- EN 10225 Grade S355G15 – Normalized or Normalized‑Formed Steel for Offshore Applications
- EN 10225 Grade S355G13 – Normalized/Normalized Formed (+N) for Offshore Structures
- EN 10216-2 Grade St 45.8: High‑Temperature Normalized Tube Steel (+N) for Seamless Tubes
- EN 10217-2 Grade St 37.8: High‑Temperature Normalized Tube Steel for Industrial Use
- EN 10217‑2 Grade St 42.8 Tube Steel – High‑Temperature Normalized Formed for Vessels & Petrochemical Use