s275 steel grade chart

S275 Steel Grade Chart

As a leading exporter and manufacturer of high-quality structural steel plates, Gangsteel specializes in producing BS EN 10025-compliant materials, including the S275 steel grade.

S275 is a non-alloy structural steel under BS EN 10025-2, widely used for general construction and welded applications due to its balanced strength, ductility, and cost-effectiveness.

This article provides a detailed chart of S275 steel grade properties, focusing on its variants (S275JR, S275J0, S275J2), and compares it to related normalized grades like S275NL.

Our S275 plates are supplied in as-rolled, normalized, or thermomechanically rolled conditions.

For a comprehensive overview of our en 10025 3 normalized steel plate offerings, including related grades like en 10025 3 s275nl normalized structural steel plate, explore our full range. Contact us at admin@gangsteel.com for inquiries.

Overview of S275 Steel Grade

S275 (BS EN 10025-2, designation 1.0044 for S275JR) is a low-carbon structural steel with a minimum yield strength of 275 MPa (for thicknesses ≤16 mm). It is available in three variants based on impact testing temperature:

• S275JR: 27 J at +20°C.
• S275J0: 27 J at 0°C.
• S275J2: 27 J at -20°C.

These grades are suitable for buildings, bridges, and machinery but are not designed for extreme low-temperature toughness like en 10025 3 s275n normalized structural steel plate or S275NL (-50°C). For higher strength, consider en 10025 3 s355nl normalized structural steel plate or en 10025 3 s420nl normalized structural steel plate.

S275 Steel Grade Properties Chart

The chart below consolidates the chemical and mechanical properties of S275 (JR, J0, J2) per BS EN 10025-2, with S275NL (EN 10025-3) included for comparison. All values are for as-rolled or normalized conditions, with mechanical properties specified for various thickness ranges (minimum values unless noted).

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

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*Notes: S275NL’s tighter C, P, and S limits enhance low-temperature toughness; CEV ensures weldability.

Mechanical Properties

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*Notes: Elongation per Lo = 5.65 √So. S275NL’s transverse impact is 16 J at -50°C. S275NL offers lower tensile strength but superior low-temperature toughness.

Weldability and Processing

• S275 (JR/J0/J2): Highly weldable (CEV ≤0.40); no preheating for ≤40 mm; 50–100°C for thicker sections. Use low-hydrogen fillers (e.g., E7018) per EN 1011-2.
• S275NL: Similar weldability (CEV ≤0.42); tighter P/S improve cold performance. Preheating optional for ≤40 mm; follow EN 1011-2.

Applications

• S275 (JR/J0/J2): General construction, buildings, bridges, and machinery in moderate climates.
• S275NL: Cold-climate bridges, offshore platforms, and cranes requiring -50°C toughness.

Why Choose Gangsteel?

Gangsteel offers ISO-certified S275 and S275NL plates in custom sizes with global export readiness. Contact us at admin@gangsteel.com for pricing and mill certificates (EN 10204 3.1).

Summary

BS EN 10025-2 S275 (JR/J0/J2) offers 275 MPa yield strength, 410–560 MPa tensile strength, and 21–23% elongation, with impact testing from +20°C to -20°C. S275NL (EN 10025-3) provides similar strength but enhanced -50°C toughness (27 J), ideal for colder environments. The charts detail their chemical and mechanical properties for easy comparison.

FAQ

What are the main variants of S275 steel?

S275JR (+20°C, 27 J), S275J0 (0°C, 27 J), and S275J2 (-20°C, 27 J) differ in impact testing temperature but share 275 MPa yield and 410–560 MPa tensile strength (≤16 mm).

How does S275NL differ from S275JR/J0/J2?

S275NL (EN 10025-3) is normalized with finer grain and 27 J impact at -50°C, compared to S275’s -20°C to +20°C testing, making it better for extreme cold.

What is the weldability of S275 grades?

All are highly weldable (CEV ≤0.40–0.42); no preheating needed for ≤40 mm. S275NL’s lower P/S enhance cold welding performance.

What applications suit S275 vs. S275NL?

S275 (JR/J0/J2) is for general construction in moderate climates; S275NL is for cold-climate structures like arctic bridges or offshore platforms.

Can S275 grades be used interchangeably with S275NL?

Not for low-temperature applications; S275NL’s -50°C toughness is critical for extreme cold, unlike S275’s -20°C maximum.