High-tensile steel for offshore structures
- The needs of high tensile steel are growing up as the size of facility increases.
- NIPPON STEEL has wide range Pre-Qualification material with high toughness for offshore structure using advanced technology.
- NIPPON STEEL has supplied offshore structural steel for various projects all over the world.
- NIPPON STEEL has applied the TMCP*1 process to offshore structural high tensile steel with excellent weldability and HAZ*2 toughness for the first time in the world.
(*1:Thermo Mechanical Control Process. *2:Heat Affected Zone) - The shift to high tensile steel leads the reduction in the size and weight of steel structure. As the result, it is possible to reduce “Distribution and installation cost” while mounting equipment.
Features
- 1Excellent TMCP technology
- 2Improvement of HAZ toughness
- 3Good weldability
- 4World-class product lineup
Benefits of use
- 1Compatible with the needs in place for high strength structures
In addition to Gr50 and Gr60 steel plates specified by API standards, we have newly developed Gr80 steel plates, being the first in the world to put it into practical use.
- 2Weight reductions
Allows for capacity in TOPSIDE-loaded equipment.
Improvement of HAZ toughness technology
Basic concept
| Metallurgical factors | Measures |
|---|---|
| Refinement of effective grain size in HAZ (HTUFFTM) |
|
|
|
|
|
| Decrease of MA–constituents |
|
| Improvement of matrix toughness |
|
Concept of HTUFFTM steel
Concept of controlling microstructure
WM: Weld Metal FL:Fusion Line γ:Austenite GBF:Grain Boundary Ferrite FSP:Ferrite Side Plate IGF:Intra-granular Ferrite Bu:Upper Bainite
For further product information
Product Quotes, and inquiries without complete information required in inquiry form may not be responded to. Selection of inquiries for reply online is at the sole discretion of NIPPON STEEL. We appreciate your understanding.