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S460G1+QT is a quenched and tempered steel grade specified in EN10225, known for its high strength and toughness, making it ideal for critical offshore and marine structures where resistance to harsh conditions and high mechanical performance are required.
CLICK HERE➡EN 10225 S460 Series Of Steel Grades
| Chemical Composition,% | |
| S460G1+QT | |
| Carbon (C) | Up to 0.14% |
| Silicon (Si) | 0.15% to 0.55% |
| Manganese (Mn) | Up to 1.65% |
| Phosphorus (P) | Up to 0.02% |
| Sulfur (S) | Up to 0.01% |
| Chromium (Cr) | Up to 0.25% |
| Molybdenum (Mo) | Up to 0.25% |
| Nickel (Ni) | Not specified |
| Niobium+Vanadium (Nb+V) | Not specified |
| Niobium+Vanadium+Titanium (Nb+V+Ti) | Up to 0.11% |

- Carbon (C): Contributes to the strength and hardness of the steel.
- Silicon (Si): Enhances strength and improves resistance to scaling at high temperatures.
- Manganese (Mn): Increases strength and helps to counteract the effects of sulfur.
- Chromium (Cr) and Molybdenum (Mo): Improve corrosion resistance and strength.
- Nickel (Ni): Enhances strength and toughness, especially at lower temperatures.
- Niobium (Nb), Titanium (Ti), and Vanadium (V): Microalloying elements that help to refine the grain structure and improve strength without compromising toughness.
These elements work together to provide S460G1+QT with its characteristic balance of high strength, toughness, and corrosion resistance, making it suitable for demanding applications in harsh marine environments.

Mechanical Properties
- Yield Strength (Rp0.2): ≥323 MPa
- Tensile Strength (Rm): ≥558 MPa
- Impact Energy (KV/Ku): 23 J
- Elongation (%): 32%
- Reduction in Cross-section on Fracture (%): 34%
- Brinell Hardness (HBW): 234
- Yield Strength (Rp0.2): ≥323 MPa, which indicates the stress level at which the steel begins to deform plastically. This high yield strength is crucial for withstanding heavy loads without permanent deformation.
- Tensile Strength (Rm): ≥558 MPa, representing the maximum stress the steel can withstand before breaking. This property ensures the steel's reliability under extreme tensile loads.
- Impact Energy (KV/Ku): 23 J, a measure of the steel's ability to absorb energy without fracturing at low temperatures, which is vital for structures exposed to cold marine environments.
- Elongation (%): 32%, indicating the steel's ductility or ability to stretch under tensile stress before breaking, which contributes to its toughness.
- Reduction in Cross Section on Fracture (Z%): 34%, reflecting the steel's capacity to deform before fracture, another aspect of its toughness.
- Heat Treatment Condition: Quenched and Tempered (Q+T), a process that enhances the steel's strength and toughness while maintaining its ductility.
These mechanical properties make S460G1+QT an ideal choice for critical applications where high strength, toughness, and resistance to environmental factors are paramount.
physical properties
The physical properties of S460G1+QT steel are crucial for its performance in demanding applications:

- Modulus of Elasticity: High values indicate the steel's stiffness and resistance to deformation under load.
- Thermal Conductivity: Important for heat transfer, affecting how the steel handles temperature changes.
- Specific Thermal Capacity: Determines how much heat is needed to change the steel's temperature, impacting its performance in hot or cold environments.
- Electrical Resistivity: Affects the steel's ability to conduct electricity, which can be relevant for electromagnetic compatibility.
- Density: Influences the weight and strength-to-weight ratio of structures, affecting design and transportation.
These properties ensure S460G1+QT steel's reliability in offshore and marine structures where it faces heavy loads and environmental challenges.
applications
S460G1+QT steel is widely used in critical offshore and marine applications due to its high strength and toughness.
- Offshore Platforms: Constructing fixed oil rigs and service platforms that require high structural integrity.
- Marine Structures: Building components for marine environments where resistance to corrosion and impact is essential.
- Wind Energy: Fabricating offshore wind turbines that endure severe weather conditions.
- Heavy Machinery: Used in heavy industrial equipment where durability and strength are key.
The quenched and tempered treatment of S460G1+QT enhances its performance in these demanding applications.




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