S460G1+QT is a high-strength offshore structural steel plate certified under EN 10225 for fixed offshore structures, oil and gas platforms, and wind turbine foundations. The "+QT" suffix indicates the quenched and tempered delivery condition, which provides an excellent combination of high strength and toughness through heat treatment. It has a minimum yield strength of 460 MPa (for thickness ≤16mm) and tensile strength ranging from 540 to 700 MPa, with a minimum elongation of 17%. Maximum plate thickness is 100 mm. The chemical composition includes carbon ≤0.14% and sulfur ≤0.010%. This grade is designed for demanding structural components requiring high strength-to-weight ratio and good weldability.
S460G2+QT is also a quenched and tempered offshore structural steel certified under EN 10225, sharing the same minimum yield strength of 460 MPa and tensile strength range of 520-670 MPa as G1. However, S460G2+QT offers stricter chemical composition controls, featuring a lower sulfur limit of ≤0.010% (compared to ≤0.010% for G1). The higher "G" number (G2 vs. G1) signifies more stringent requirements for purity and toughness. Maximum plate thickness is also 100 mm. This grade is widely used for critical applications such as offshore drilling platforms, jack-up rig legs, and marine engineering projects requiring maximum strength-to-weight ratio and superior low-temperature performance.
Both S460G1+QT and S460G2+QT are EN 10225-certified quenched and tempered offshore structural steels with identical mechanical properties and impact requirements. Their primary difference lies in chemical purity: S460G1+QT is suitable for general offshore applications, while S460G2+QT features stricter limits on sulfur (≤0.007%), offering enhanced low-temperature toughness and weldability for more demanding offshore structures. Both grades maintain excellent weldability and are available up to 100mm thickness.
Mechanical property for S460G1+QT steel plate:
| Thickness (mm) | ||||||
| S460G1+QT steel plate | ≤ 16 | > 16 ≤ 25 | > 25 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 |
| Yield strength (≥Mpa) | 460 | 440 | 420 | 415 | 405 | 400 |
| Tensile strength (Mpa) | 540-700 | 530-690 | 520-680 | 515-675 | 505-665 | 500-660 |
Mechanical property for S460G2+QT steel plate:
| Thickness (mm) | ||||||
| S460G2+QT steel plate | ≤ 16 | > 16 ≤ 25 | > 25 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 |
| Yield strength (≥Mpa) | 460 | 440 | 420 | 415 | 405 | 400 |
| Tensile strength (Mpa) | 540-700 | 530-690 | 520-680 | 515-675 | 505-665 | 500-660 |
Chemical composition for S460G1+QT steel plate
| Main chemical elements composition of S460G1+QT steel plate | ||||||||
| C | Si | Mn | P | S | Cr | Mo | Nb+V | Nb+V+Ti |
| 0.14 | 0.15-0.55 | 1.65 | 0.020 | 0.010 | 0.25 | 0.25 | 0.09 | 0.11 |
| Ni | Alt | Cu | N | Nb | Ti | V | Cr+Mo+Ni+Cu | |
| 0.70 | 0.015-0.055 | 0.30 | 0.010 | 0.040 | 0.025 | 0.080 | 0.90 | |
Chemical composition for S460G2+QT steel plate
| Main chemical elements composition of S460G2+QT steel plate | ||||||||
| C | Si | Mn | P | S | Cr | Mo | Nb+V | Nb+V+Ti |
| 0.14 | 0.15-0.55 | 1.65 | 0.020 | 0.010 | 0.25 | 0.25 | 0.09 | 0.11 |
| Ni | Alt | Cu | N | Nb | Ti | V | Cr+Mo+Ni+Cu | |
| 0.70 | 0.015-0.055 | 0.30 | 0.010 | 0.040 | 0.025 | 0.080 | 0.90 | |
S460 Plate Main Applications
- Fixed offshore structures - jackets, decks and nodes;
- Oil and gas platforms and jack-up rig legs;
- Wind-turbine foundations and marine engineering components requiring high strength-to-weight ratio and low-temperature performance.
Other Terms
- Packaging Details: Standard export seaworthy packing or as required.
- Delivery Time: 30-50 days, 7 days for stock goods.
- Loading Port: Shanghai ,Tianjin, Qingdao.
- Offer Ability:5 000MT/Per Month.
- MOQ: 1 Pcs.
