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S355G8+M,S355G8+M Steel plate

Steel Standard:EN 10225

Rolling Type:Oil and offshore platform steel plate

Thickness:6mm-300mm

Width:1500mm-4200mm

Length:3000mm-18000mm

Heat Treatment:Thermo-Mechanical Control Process (TMCP)

What is S355G8+M Steel Plate?

Low alloy structural steel S355G8+M,S355G8+M steel plate,S355G8+M steel sheet is Under European steel standard En 10225,S355G8 has two different types,aush as S355G8+M and S355G8+N,the main difference is the heat treatment when rolling.Oil and offshore platform steel plate S355G8+M shall be done TMCP when rolling,and S355G8+N shall be done Normalized heat treatment.These two oil and offshore steel grade shall be done low temperature under mins 40 centigrade and the minimum energy value shall be above 50J.

Characteristics of S355G8+M Ship Steel Plate

Aside from its advantages, S355G8+M ship steel plate also possesses specific characteristics that set it apart from other materials. Some of the key characteristics include:

  • Impact Resistance: The steel plate has excellent impact resistance, making it suitable for withstanding heavy loads and harsh conditions.
  • Good Formability: S355G8+M steel plate can be easily formed into various shapes, allowing for flexibility in design and construction.
  • High Durability: The material is highly durable, ensuring the longevity and reliability of the vessel.

Application Fields and Uses of S355G8+M Ship Steel Plate

S355G8+M ship steel plate is commonly used in a variety of shipbuilding applications due to its superior properties. Some of the key application fields and uses include:

  • Hull Construction: The steel plate is often used in the construction of ship hulls, providing structural integrity and strength.
  • Decking: S355G8+M steel plate is also used for decking purposes, offering a stable and secure surface for crew members.
  • Offshore Platforms: The material is utilized in the construction of offshore platforms, where durability and corrosion resistance are essential.
Specification Parameters
Basic Information

Mechnical property for S355G8+M steel plate:

Thickness (mm)
S355G8+M ≤ 16 > 16 ≤ 25 > 25 ≤ 40 > 40 ≤ 63 > 63 ≤ 100 > 100
Yield strength (≥Mpa) 355 355 345 335 325 325
≤ 100 > 100
Tensile strength (Mpa) 470-630 470-630

Chemical composition for S355G8+M steel plate (Ladle Analysis Max%)

Main chemical elements composition of S355G8+M steel plate
C Si Mn P S Cr Mo Nb+V Nb+V+Ti
0.14 0.15-0.55 1.00-1.65 0.020 0.007 0.25 0.08 0.06 0.08
Ni Alt Cu N Nb Ti V Cr+Mo+Ni+Cu
0.50 0.015-0.055 0.30 0.010 0.040 0.025 0.060 0.90
Service Support
S355G8+M,S355G8+M Steel plate

S355G8+M Equivalent Grades Comparison Table

Standard

Equivalent Grade

Notes

EN 10025-2

S355J2+N / S355K2+N Similar mechanical properties, but not for offshore use
EN 10225 S355G8+M Specific for offshore structures
ASTM / ASME A572 Grade 50 (approx.) Similar yield but not identical chemistry
BS (UK) 50D / 50DD Older British structural steel grades
API (USA) API 2H Grade 50 Offshore steel with higher toughness
ISO ISO 630-2 Grade S355N Close in composition and application
JIS (Japan) SM490YA (approx.) Comparable yield strength
China (GB/T) Q345D (approx.) Similar yield, lower toughness in cold