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S275JR Channel Steel

    S275JR Channel Steel

    S275JR Channel Steel, commonly designated in Europe as UPN (Ungleichschenkliger Profil Stahl Normal or Unequal Flange Channel) or simply as C-section, is a hot-rolled, non-alloy structural steel grade defined by the European standard EN 10025-2. It is one of the most widely used carbon structural steels due to its excellent combination of strength, weldability, and cost-effectiveness.
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S275JR Channel steel, commonly designated in Europe as UPN (Ungleichschenkliger Profil Stahl Normal or Unequal Flange Channel) or simply as C-section, is a hot-rolled, non-alloy structural steel grade defined by the European standard EN 10025-2. It is one of the most widely used carbon structural steels due to its excellent combination of strength, weldability, and cost-effectiveness.

Product Name

S275JR Channel Steel

Standard

AISI, ASTM, DIN, JIS, GB,JIS, SUS, EN, etc.

Material

S275JR

Surface

black painted, anti rust varnished, PE coated, anti rust oiled, galvaniZed, checkered, color coated

Commonly Used Size(h×b×d, mm)

50×37×4.5,63×40×4.8,80×43×5.0,100×48×5.3,120×53×5.5,140×58×6.0,or as per your request

h

50~400mm, according to customer's requirement

b

37~104mm,or as per your request

d

4.5~14.5mm,or as per your request

Technical  Methods

Hot Rolled/Cold Rolling

Packaging

According to customer required

Application

Applied in multiple fields such as architecture, bridges, machinery, energy, etc. etc.

Packing

Standard Seaworthy Packing (Plastic film in the first layer,second layer is Kraft paper. Third layer is galvanized sheet)

MOQ

1 Ton, more quantity price will be lower

Key Characteristics and Properties

Grade Designation: S275JR

S stands for "Structural" steel.

275 indicates the minimum yield strength of 275 Megapascals (MPa) at a thickness of ≤16mm. This is a key measure of its load-bearing capacity before it begins to deform permanently.

JR denotes the impact toughness at room temperature (+20°C / 68°F) according to the Charpy V-notch test. "JR" guarantees a minimum level of toughness for good resistance to shock and vibration.

Mechanical Properties:

Yield Strength (ReH): 275 MPa (for thicknesses ≤ 16mm). This decreases slightly for thicker sections.

Tensile Strength (Rm): 410 - 560 MPa.

Elongation at Break: Excellent elongation (typically 23% min), which allows it to deform significantly before fracture, a valuable safety property.

Notch Toughness: Suitable for use in environments where the service temperature is not expected to fall below 0°C.

Chemical Composition:

S275JR is a non-alloy steel with a controlled chemical composition to ensure its properties. Key elements include:

Carbon (C): Low carbon content (typically max 0.21%), which is crucial for its good weldability and formability.

Manganese (Mn): Enhances strength and toughness.

Phosphorus (P) and Sulfur (S): These are kept to low levels (max 0.040% and 0.040% respectively for JR quality) to improve ductility and weldability.

Common Specifications and Standards:

European Standard: EN 10025-2 (Technical delivery conditions for hot-rolled products of structural steels)

Channel Designation: EN 10279: 2000 (Specification for hot-rolled steel channels)

Equivalent Grades: It is often compared to ASTM A36 in the USA, though the chemical and mechanical properties are not identical.

Applications

S275JR channels are fundamental components in a vast array of structural and industrial applications, including:

Building and Construction: Primary and secondary frames, roof trusses, purlins, girts, and support columns.

Heavy Equipment & Machinery: As frames, bases, and support structures for industrial machinery.

Vehicle and Trailer Manufacturing: For chassis and framework.

Infrastructure Projects: Bridges, platforms, walkways, and railings.

General Fabrication: Used to fabricate brackets, frames, and supports for various engineering projects.

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