s275nl equal GB grade

S275NL Equivalent GB Grade

As a premier exporter and manufacturer of high-quality structural steel plates, Gangsteel specializes in producing EN 10025-3 compliant materials, including the versatile S275NL steel grade.

S275NL is a normalized fine-grain structural steel with a minimum yield strength of 275 MPa and excellent impact toughness at -50°C, ideal for welded constructions in cold environments like bridges and offshore structures.

When sourcing in China, the equivalent GB grade is Q275N under GB/T 1591-2018, which matches the normalized condition and low-temperature properties.

For a comprehensive overview of our en 10025 3 normalized steel plate offerings, explore our full range.

S275NL and Its GB Equivalent: Q275N

S275NL (EN 10025-3, designation 1.0491) is a weldable fine-grain steel optimized for toughness down to -50°C. The closest equivalent in the Chinese GB standard is Q275N (GB/T 1591), a high-strength low-alloy structural steel with similar yield strength and normalized delivery. Q275N provides comparable weldability and impact resistance, making it a direct substitute for projects adhering to Chinese specifications. Note that Q275NL (with -50°C impact) may align even closer for extreme cold, but Q275N is the standard match.

Gangsteel supplies both EN and GB-certified plates, ensuring seamless integration for international projects. For related grades, see en 10025 3 s275n normalized structural steel plate or en 10025 3 s275nl normalized structural steel plate.

Equivalent Grades Table

Chemical Composition Comparison (Max % Unless Noted, ≤100 mm Thickness)

*Note: Q275N allows slightly higher impurities but maintains weldability; both use grain refiners like Nb/V.

Mechanical Properties Comparison (Normalized, ≤16 mm Thickness, Minimum)

*Notes: Q275N impact at -20°C standard; specify Q275NL for -50°C match. Properties scale similarly with thickness up to 250 mm.

Applications and Substitution Notes

Both grades suit heavy engineering, infrastructure, and offshore uses. Substitute Q275N for S275NL in GB-compliant projects, verifying impact testing for cold service. For higher strength, consider en 10025 3 s355nl normalized structural steel plate.

Why Choose Gangsteel?

Gangsteel provides dual-certified S275NL/Q275N plates with ISO quality, up to 250 mm thick, for global export. Visit our en 10025 3 s420nl normalized structural steel plate for upgrades.

Summary

The GB equivalent to S275NL is Q275N (GB/T 1591), offering matching 275 MPa yield, tensile strength, and normalized fine-grain structure for low-temperature welded applications. Minor chemistry differences exist, but both ensure excellent toughness and weldability in structural projects.

FAQ

What is the exact GB grade equivalent to S275NL?

Q275N under GB/T 1591-2018 is the primary equivalent, with 275 MPa yield and normalized condition. For -50°C impact, specify Q275NL variant.

How do the chemical compositions of S275NL and Q275N differ?

S275NL has tighter limits on C (0.16% max vs. 0.20%), P (0.025% vs. 0.035%), and S (0.020% vs. 0.035%) for better cold toughness, but both have CEV ≤0.42 for weldability.

Are the mechanical properties identical between S275NL and Q275N?

Yes for yield (275 MPa) and tensile (370–510 MPa) at thin sections; elongation is slightly lower in Q275N (22% vs. 24%). Impact at -50°C is 27 J for both when specified.

Can Q275N replace S275NL in international projects?

Yes, with certification; it's ideal for China-sourced supply chains, but confirm impact testing for sub-zero use per EN/GB standards.

What if I need a higher-strength GB equivalent?

For S355NL equivalents, use Q345N/Q345NL; contact Gangsteel for cross-standard advice.