S235JR Carbon Steel Square Bar | EN 10059 Hot Rolled & Cold Drawn Square Steel Bar

Excellent weldability and formability
CE certified, meets EU construction requirements
Stable mechanical performance for general structures
Smooth bright surface option from cold drawing
Broad size selection for custom fabrication

Product Overview

S235JR Carbon Steel Square Bar is produced following EN 10059 specification, widely used for European-standard structural fabrication and mechanical bases. Available in hot rolled and cold drawn types. Hot rolled square bar has black oxide surface; cold drawn version features bright smooth surface with tighter dimensional tolerance. S235JR is a common non-alloy structural steel with good ductility and machinability. It is ideal for building frames, mechanical supports, racks and general metal fabrication projects. Custom cut lengths are available to match project demands.

Carbon Steel Square Bar

Chemical & Mechanical Property Snapshot

Item	S235JR Carbon Steel Square Bar (EN 10059)
Carbon (C)	≤0.17%
Silicon (Si)	≤0.35%
Manganese (Mn)	≤1.40%
Phosphorus (P)	≤0.035%
Sulfur (S)	≤0.035%
Yield Strength (Min)	235 MPa
Tensile Strength	360–510 MPa
Elongation (Min)	≥25%
Impact Test	JR grade, +20℃ impact energy

Detailed Technical Specifications

Specification Item	Parameter
Product Name	S235JR Carbon Steel Square Bar
Standard	EN 10059
Production Process	Hot-Rolled / Cold-Drawn
Size Range	Hot Roll:10×10–200×200 mm; Cold Drawn:5×5–50×50 mm
Surface Condition	Hot-rolled black surface / Bright cold-drawn surface
Dimensional Tolerance	Hot Roll: ±0.5–2 mm; Cold Drawn: ±0.1–0.3 mm
Length	3m–12m or customized cut length
MOQ	5 Ton
Lead Time	7–15 working days
Package	Steel bundle with metal strapping, waterproof wrapping

Size Specification Table

Type	Size Range	Available Side Dimensions (mm)	Tolerance
Hot Rolled Carbon Steel Square Bar	10×10 mm–200×200 mm	10, 12, 16, 20, 25, 30, 40, 50, 60, 80, 100, 120, 150, 200	±0.5–±2 mm
Cold Drawn Carbon Steel Square Bar	5×5 mm–50×50 mm	5, 6, 8, 10, 12, 14, 16, 20, 25, 30, 40, 50	±0.1–±0.3 mm

Product Comparison Table

Comparison Item	Q235B Carbon Steel Square Bar	Q355B Carbon Steel Square Bar	S235JR Carbon Steel Square Bar	S355JR Carbon Steel Square Bar	A36 Carbon Steel Square Bar
Equivalent Standard	GB/T 702	GB/T 702	EN 10059	EN 10059	ASTM A675
Manufacturing Process	Hot-Rolled / Cold-Drawn	Hot-Rolled / Cold-Drawn	Hot-Rolled / Cold-Drawn	Hot-Rolled / Cold-Drawn	Hot-Rolled / Cold-Drawn
Size Range	Hot Roll: 10×10–200×200 mm; Cold Drawn: 5×5–50×50 mm	Hot Roll: 10×10–200×200 mm; Cold Drawn: 5×5–50×50 mm	Hot Roll: 10×10–200×200 mm; Cold Drawn: 5×5–50×50 mm	Hot Roll: 10×10–200×200 mm; Cold Drawn: 5×5–50×50 mm	Hot Roll: 10×10–200×200 mm; Cold Drawn: 5×5–50×50 mm
Surface Condition	Hot-rolled black surface / Bright cold-drawn surface	Hot-rolled black surface / Bright cold-drawn surface	Hot-rolled black surface / Bright cold-drawn surface	Hot-rolled black surface / Bright cold-drawn surface	Hot-rolled black surface / Bright cold-drawn surface
Dimensional Tolerance	Hot Roll: ±0.5–2 mm; Cold Drawn: ±0.1–0.3 mm	Hot Roll: ±0.5–2 mm; Cold Drawn: ±0.1–0.3 mm	Hot Roll: ±0.5–2 mm; Cold Drawn: ±0.1–0.3 mm	Hot Roll: ±0.5–2 mm; Cold Drawn: ±0.1–0.3 mm	Hot Roll: ±0.5–2 mm; Cold Drawn: ±0.1–0.3 mm
Yield Strength (Min)	235 MPa	355 MPa	235 MPa	355 MPa	250 MPa
Main Application	General steel structures, mechanical frames, mold blanks	Heavy-load supports, engineering structures, lifting parts	European-standard structural fabrication, mechanical bases	High-strength European engineering structures	American-standard machinery, structural components
Cost Level	Medium	Medium-High	Medium	Medium-High	Medium
Feature	Good weldability & machinability	High strength, good impact resistance	Excellent weldability, CE compliance	High strength, CE certified	Stable performance, ASTM standard

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Hardware Stamping Blanking

Steel Structure Support

Machine Frame

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What standard is S235JR square bar?

S235JR carbon steel square bar complies with EN 10059 standard for hot rolled and cold drawn solid square steel bars.

What does JR mean for S235JR?

JR stands for room temperature impact test at +20°C, suitable for normal ambient working conditions.

Is S235JR square bar CE certified?

Yes, we can supply CE marked S235JR square bar to meet European construction market requirements.

What surface types are available?

Hot rolled black surface and bright cold drawn surface with tighter tolerance for precision machining.

Can I get custom cut lengths of S235JR square bar?

Custom cutting service is available. MOQ 5 tons, production lead time 7–15 working days.

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S235JR Carbon Steel Square Bar | EN 10059 Hot Rolled & Cold Drawn Square Steel Bar