S355NL Equivalent Material ASTM and More

S355NL Equivalent Material: ASTM and More

S355NL equivalent material refers to steel grades from other international standards that closely match the properties of EN 10025-3 S355NL, a high-strength, fine-grained structural steel known for its excellent toughness and weldability in low-temperature environments.

 This article explores the S355NL equivalent, with a focus on S355NL equivalent material ASTM standards like ASTM A572 Grade 65, as well as equivalents in other standards such as Chinese GB, DIN, and ISO. By comparing chemical composition, mechanical properties, and applications, we address core keywords including s355nl equivalent material, s355nl equivalent, s355nl equivalent material astm, and s355nl astm equivalent. For more details, visit our EN 10025-3 S355NL normalized structural steel plate.

What is S355NL Steel?

S355NL is a normalized or normalized rolled fine-grain structural steel under EN 10025-3, designed for low-temperature applications. Its designation indicates:

• S: Structural steel.
• 355: Minimum yield strength of 355 MPa for thicknesses up to 16 mm.
• NL: Normalized with impact toughness tested at -50°C.

Its fine-grain structure ensures superior toughness, weldability, and resistance to brittle fracture, making it ideal for cold-climate structures like offshore platforms and wind towers.

Chemical Composition of S355NL

The chemical composition of S355NL equivalent material is critical for determining equivalence. Below is the composition for S355NL (ladle analysis) per EN 10025-3:

Carbon Equivalent (CEV): ≤0.43% (≤63 mm), calculated as CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, ensuring excellent weldability. Equivalents must have similar CEV and alloying for comparable performance.

Mechanical Properties of S355NL

The mechanical properties of S355NL include:

• Yield Strength: ≥355 MPa (≤16 mm).
• Tensile Strength: 470-630 MPa.
• Elongation: ≥22% (≤63 mm).
• Impact Toughness: ≥27 J at -50°C (Charpy V-notch, longitudinal).

Equivalents should match these properties, particularly the low-temperature toughness.

S355NL Equivalent Materials

The S355NL equivalent varies by standard, with differences in strength, toughness, and processing:

S355NL ASTM Equivalent

The closest S355NL equivalent material ASTM is ASTM A572 Grade 65, but ASTM A633 Grade E is a better match for low-temperature applications:

• A572 Grade 65:
  • Yield: ≥448 MPa (65 ksi).
  • Tensile: 550-690 MPa.
  • Toughness: Optional testing at 0°C, not as robust at -50°C.
  • CEV: ~0.47%, slightly higher, requiring more preheating.
• A633 Grade E:
  • Yield: ≥415 MPa.
  • Tensile: 550-690 MPa.
  • Toughness: ≥34 J at -40°C, closer to S355NL’s -50°C performance.
  • CEV: ~0.45%, similar weldability.

A572 Grade 65 is stronger but less suited for extreme cold; A633 Grade E better aligns with S355NL astm equivalent for toughness.

Welding and Heat Treatment

S355NL’s low CEV (≤0.43%) ensures excellent weldability with GMAW or SAW (EN 1011-2):

• Preheating: Not needed for ≤20 mm; 100-150°C for thicker plates.
• PWHT: Optional at 550-650°C for critical welds.
• Consumables: ER70S-6 (GMAW), EM12K flux with EH14 wire (SAW).

Equivalents like A572 Grade 65 may require more preheating due to higher CEV (~0.47%), while A633 Grade E aligns closely with S355NL’s welding ease.

Applications of S355NL and Equivalents

S355NL:

• Offshore platforms in cold marine environments.
• Wind towers in sub-zero climates.
• Bridges and cranes in northern regions.
• Pressure vessels for low-temperature storage.

Equivalents:

• A572 Grade 65: High-rise buildings, bridges in temperate climates.
• A633 Grade E: Offshore structures, cold-region infrastructure.
• Q345E: Similar applications in China, slightly less cold-tolerant (-40°C).

Explore related grades like EN 10025-3 S420NL normalized structural steel plate.

Why Choose Gangsteel for S355NL?

Gangsteel supplies S355NL equivalent material:

• Inventory: Extensive stock in China.
• Sizes: Thickness 6–250 mm, widths 2000/2500/3000 mm, lengths up to 12,000 mm.
• Delivery: 7-30 days globally.
• Certifications: EN 10204 3.1/3.2, UT testing (EN 10160), ABS/LR/BV/DNV approvals.
• Processing: Cutting, welding, bending.

Contact us for EN 10025-3 S355NL normalized structural steel plate.

FAQ

What is the S355NL equivalent material?
Grades like ASTM A572 Grade 65, A633 Grade E, Q345E, and StE 355 match closely.

What is the best S355NL astm equivalent?
A572 Grade 65 for strength; A633 Grade E for low-temperature toughness.

How does S355NL equivalent Q345E compare?
Q345E has similar strength but -40°C toughness, slightly less robust than S355NL’s -50°C.

Is S355NL equivalent material ASTM weldable?
Yes; S355NL and A633 Grade E have similar CEV (≤0.43-0.45%), but A572 Grade 65 may need more preheating.

What are applications of S355NL?
Offshore platforms, wind towers, and cold-region bridges.

How does S355NL compare to S355N?
S355NL is tested at -50°C, S355N at -20°C. See EN 10025-3 S355N normalized structural steel plate.

Explore EN 10025-3 S275N normalized structural steel plate for other options.