S420G2+QT MARINE STEEL SHEET
S420G2+QT MARINE STEEL SHEET 3

When it comes to marine applications, the choice of material is crucial for ensuring the safety and durability of structures. S420G2+QT marine steel sheet is a high-strength steel that is specifically designed for use in offshore and marine environments.

EN10225 S420G2+QT Steel Chemical Composition   

GradeChemical Composition
S420G2+QTThe Element Max (%)
CSiMnPSNbVTiAlCrNiMoCuN
0.140.15
|
0.55
1.650.0200.0070.0400.0800.0250.015
|
0.055
0.250.700.250.300.010

EN10225 S420G2+ QT Steel Mechanical Property

GradeMechanical Property
 S420G2+QTYield Strength
mm
Min(Mpa)
Tensile Strength
mm
Min(Mpa)
 Elongation
Min,%
 

40

40

100
≤16
16

40

40

63

63

80

80

100
 19
500-660480-640420400390380380

Advantages of S420G2+QT Marine Steel Sheet

S420G2+QT marine steel sheet offers a range of advantages that make it an ideal choice for marine applications. Some of the key advantages include:

  • High Strength: S420G2+QT steel has a minimum yield strength of 420 MPa, making it suitable for use in demanding marine environments.
  • Excellent Weldability: This steel grade can be easily welded using conventional methods, allowing for efficient fabrication and construction.
  • Good Toughness: S420G2+QT steel exhibits good toughness properties, which are essential for withstanding impact and fatigue loads in marine structures.
  • Corrosion Resistance: The steel is designed to resist corrosion in marine environments, ensuring long-term durability and performance.

Characteristics of S420G2+QT Marine Steel Sheet

In addition to its advantages, S420G2+QT marine steel sheet also possesses a range of characteristics that set it apart from other materials. Some of the key characteristics include:

  • High Ductility: S420G2+QT steel offers high ductility, allowing for easy forming and shaping during fabrication processes.
  • Low Carbon Equivalent: The steel has a low carbon equivalent, which helps to reduce the risk of hydrogen-induced cracking during welding.
  • Impact Resistance: S420G2+QT steel is designed to withstand impact loads, making it suitable for use in offshore structures subject to harsh environmental conditions.
  • Good Fatigue Resistance: The steel exhibits good fatigue resistance, ensuring long-term performance in marine applications where cyclic loading is present.

Applications and Uses of S420G2+QT Marine Steel Sheet

S420G2+QT marine steel sheet is commonly used in a variety of marine applications due to its high strength and durability. Some of the key applications and uses include:

  • Offshore Platforms: The steel is often used in the construction of offshore platforms, where it provides structural support and stability in harsh marine environments.
  • Shipbuilding: S420G2+QT steel is used in the construction of ships and marine vessels, where its high strength and corrosion resistance are essential for ensuring safety and longevity.
  • Offshore Wind Farms: The steel is also used in the construction of offshore wind farms, where it provides support for wind turbine structures in challenging marine conditions.
  • Subsea Pipelines: S420G2+QT steel is utilized in the fabrication of subsea pipelines, where its corrosion resistance and high toughness properties are critical for withstanding underwater conditions.

Frequently Asked Questions

1. What is the minimum yield strength of S420G2+QT marine steel sheet?

The minimum yield strength of S420G2+QT steel is 420 MPa, making it suitable for use in demanding marine environments.

2. What are some key advantages of S420G2+QT marine steel sheet?

Some key advantages of S420G2+QT steel include high strength, excellent weldability, good toughness, and corrosion resistance.

3. Where is S420G2+QT marine steel sheet commonly used?

S420G2+QT steel is commonly used in offshore platforms, shipbuilding, offshore wind farms, and subsea pipelines due to its high strength and durability.

4. What are some key characteristics of S420G2+QT marine steel sheet?

Some key characteristics of S420G2+QT steel include high ductility, low carbon equivalent, impact resistance, and good fatigue resistance.

5. How does S420G2+QT steel compare to other materials in marine applications?

S420G2+QT steel offers a unique combination of high strength, toughness, and corrosion resistance, making it a preferred choice for marine structures.

In conclusion, S420G2+QT marine steel sheet is a versatile and reliable material that is well-suited for a wide range of marine applications. Its high strength, excellent weldability, and corrosion resistance make it an ideal choice for offshore platforms, shipbuilding, offshore wind farms, and subsea pipelines. By understanding the advantages, characteristics, applications, and uses of S420G2+QT steel, engineers and designers can make informed decisions when selecting materials for marine projects.

Why Choose Gnee Steel

If you want to find a trustable steel products manufacturer, Gnee will be your best choice. 15 years of experience steel products manufacturer, certified by the classification society, CE, ISO, and SGS. And we guarantee the highest safety and quality standards. We fulfill all requirements of reputed classification societies.
certificate

In addition, our steel has been successfully exported to more than 60 countries such as Germany, South Korea, the United States, Mexico, and Argentina. Many regular customers come to visit our company and factory and make multiple orders.

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What Services Does Gnee Provide?
Measurement-and-quality-testing3
  • Dimensional Inspection: Length, width, diameter; Thickness, straightness; Flatness, profile;
  • Surface Inspection: Visual inspection; Roughness testing; Coating thickness measurement;
  • Composition Testing: Interstitial elemental analysis - C,S,P, Si; Alloy grading verification; Inclusion rating;
  • Mechanical Testing: Tensile strength, yield strength; Toughness, ductility; Hardness testing;
  • Flaw Detection: Ultrasonic, radiographic testing; Magnetic particle, dye penetrant testing;
  • Documentation: Inspection reports; Test certificates; Material traceability
Machining-and-finishing1
Machining-and-finishing3
Machining-and-finishing2
  • CNC machining - turning, milling, drilling
  • Surface treatments like polishing
  • Heat treatments - quenching, annealing
  • Wet/powder coating
cutting-service3
cutting-service1
cutting-service2
  • Waterjet cutting
  • Laser cutting
  • Plasma cutting
  • Shearing/punching
Molding-and-Manufacturing3
Molding and Manufacturing1
Molding-and-Manufacturing2
  • Rolling
  • Press braking
  • Plate bending - concave & convex
  • Profile bending -custom fabrication as per drawings
Testing-and-Inspection3
Testing-and-Inspection1
Testing-and-Inspection2
  • Chemical analysis
  • Mechanical testing
  • Non-destructive examination
  • Ultrasonic, radiography testing

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