S355NL ASTM A572 Gr 65 Comparison

S355NL ASTM A572 Gr 65 Comparison

S355NL ASTM equivalent is often ASTM A572 Grade 65, a high-strength low-alloy (HSLA) steel under ASTM A572/A572M. While A572 Gr 65 is close in strength to S355NL (EN 10025-3), it differs in low-temperature toughness and processing. This article compares S355NL equivalent ASTM A572 Gr 65, including chemical composition, mechanical properties, weldability, and applications, addressing core keywords s355nl astm equivalent and s355nl equivalent astm. 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, with:

• S: Structural steel.
• 355: Minimum yield strength of 355 MPa (≤16 mm).
• NL: Normalized, with impact toughness tested at -50°C.

Its fine-grain structure ensures superior toughness and weldability for cold climates.

What is ASTM A572 Grade 65?

A572 Gr 65 is an HSLA structural steel under ASTM A572, typically hot-rolled, with:

• A572: Standard for carbon and HSLA structural steel plates.
• Grade 65: Minimum yield strength of 65 ksi (450 MPa).

It's used for buildings and bridges in temperate climates, focusing on strength.

Chemical Composition Comparison

The S355NL ASTM equivalent comparison shows A572 Gr 65's higher carbon but similar alloying:

Carbon Equivalent (CEV):

• S355NL: ≤0.43% (≤63 mm).
• A572 Gr 65: ≤0.47% (typical).

S355NL’s lower carbon and impurities enhance toughness; A572 Gr 65's higher Mn supports strength.

Mechanical Properties Comparison

S355NL equivalent ASTM A572 Gr 65 shows strength similarities but toughness differences:

Strength: A572 Gr 65 has higher yield (450 MPa) and tensile strength, suiting weight-optimized designs.
Toughness: S355NL’s -50°C testing excels in cold; A572 Gr 65’s optional 0°C is less robust.
Thickness: S355NL up to 250 mm; A572 Gr 65 up to 100 mm.

Welding and Heat Treatment

• S355NL: CEV ≤0.43%, preheating 100-150°C for >20 mm; PWHT optional (550-650°C). Consumables: ER70S-6 (GMAW), EM12K flux with EH14 wire (SAW).
• A572 Gr 65: CEV ≤0.47%, more preheating (125-175°C for >25 mm). PWHT rarely needed.

S355NL is easier to weld due to lower CEV.

Applications

• S355NL: Cold-climate offshore, wind towers, arctic bridges.
• A572 Gr 65: Temperate buildings, bridges, machinery frames.

S355NL excels in cold; A572 Gr 65 in strength-focused temperate use.

Why Choose Gangsteel?

Gangsteel supplies S355NL:

• Inventory: Extensive stock in China.
• Sizes: Thickness 6–250 mm, widths 2000/2500/3000 mm.
• Delivery: 7-30 days globally.
• Certifications: EN 10204 3.1/3.2, UT testing.

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

FAQ

What is the S355NL ASTM equivalent?
A633 Grade E is the best S355NL ASTM equivalent for -40°C toughness (415 MPa yield); A572 Gr 65 matches strength but less for cold.

Is A572 Gr 65 a S355NL equivalent ASTM?
A572 Gr 65 is a S355NL equivalent ASTM for strength (450 MPa yield), but S355NL’s -50°C toughness makes A633 Gr E better for cold use.

What is the S355NL ASTM equivalentfor toughness?
A633 Grade E is the S355NL ASTM equivalent for toughness with 34 J at -40°C, close to S355NL’s 27 J at -50°C.

How does S355NLcompare to A572 Gr 65 in cold?
S355NL outperforms A572 Gr 65 in cold with -50°C toughness vs optional 0°C, ideal for arctic applications.

What is the S355NL equivalent ASTMfor strength?
A572 Gr 65 is the S355NL equivalent ASTM for strength with 450 MPa yield, but S355NL’s toughness makes it better for cold climates.

What is the S355NL ASTM equivalentin China?
Q345E is the Chinese S355NL ASTM equivalent with -40°C toughness. See EN 10025-3 S355N normalized structural steel plate.