S235JR Structural Angle

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S235JR Structural Angle
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S235JR Structural Angle is a low-carbon structural angle steel manufactured according to EN 10025-2 standard, primarily used for load-bearing and connecting structural components.
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Description

Introduction

 

S235JR Structural Angle is a low-carbon structural angle steel manufactured according to EN 10025-2 standard, primarily used for load-bearing and connecting structural components. Typical applications include building structures, steel frames, and general engineering support components.

 

Specification

 

Typical standards

EN 10025-2: S235JR, Comparable grades: ASTM A36, DIN St37-2, JIS SS400

Leg width

20 mm to 200 mm

Thickness

3 mm to 20 mm

Length

6 m, 9 m, 12 m, or custom cut lengths

Yield strength

≥ 235 MPa

Tensile strength

360–510 MPa

Elongation

≥ 26%

Element

Content (%)

Carbon (C)

≤ 0.17

Manganese (Mn)

≤ 1.40

Silicon (Si)

≤ 0.50

Phosphorus (P)

≤ 0.045

Sulfur (S)

≤ 0.045

 

Features

 

High plastic deformation capacity

With an elongation of ≥26%, it can produce considerable plastic deformation after the stress exceeds the yield point, providing structural deformation warning space rather than instantaneous fracture.

 

Low carbon composition

Carbon content ≤0.17%, combined with manganese content ≤1.40%, reduces the risk of cracking and minimizes work hardening during cold bending, punching, and cutting.

 

Wide range of cross-sectional specifications

Side width range 20–200 mm, thickness 3–20 mm, and available in standard or custom lengths of 6 m, 9 m, and 12 m, suitable for structural designs with different spans and connection types.

 

Applications

 

  • In the building structure industry, it is used in beam-column joints, supporting components, and frame structures to bear the burden of foundation load transfer and component connection.
  • In infrastructure engineering, it is used in bridge ancillary structures, platform supports, and guardrail systems, participating in the overall structural system as a load-bearing or fixing element.
  • In the machinery manufacturing industry, it is used in equipment frames, support bases, and external structural components, providing basic rigid support and connection functions.
  • In the steel structure fabrication industry, it is used as standard profiles in welded or bolted structures to form composite sections or auxiliary load-bearing components.

 

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FAQ

Q: How should S235JR and A36 be selected?

A: Both are low-carbon structural steels with similar mechanical properties. They can be used as substitutes when there are no mandatory standard requirements, but specific project specifications must be checked.

Q: How should the thickness of angle steel be selected to meet structural requirements?

A: Thickness is usually determined based on stress calculations. When the bending moment or shear force increases, the thickness or cross-sectional dimensions should be increased to meet strength and stiffness requirements.

Q: What precautions should be taken during welding?

A: Due to the low carbon content, preheating is generally not required. However, for thick sections or in low-temperature environments, it is recommended to control the welding heat input and avoid rapid cooling to reduce residual welding stress.

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