- 1. Overview of S235JR Basic Properties: Why Is It So Common?
- 2. S235JR Steel Plate — Basic Material for Structural Engineering and Equipment Manufacturing
- 3. S235JR Pipe / S235JR Structural Steel Pipe — Ideal Choice for Structural and Transmission Pipes
- 4. S235JR Round Bar — Universal Material for Machining and Forging
- 5. S235JR Angle Steel — Cost-Effective Structural Steel Profile
- 6. Comparison Table of Four S235JR Product Forms
- 7. How to Ensure Purchasing Genuine S235JR?
- 8. Why Choose LONGMA? (Reliability Matters More Than Price)
- 9. Conclusion
As one of the most commonly used non-alloy structural steels in the EN 10025-2 standard, S235JR occupies an important position in fields such as building structures, bridges, machinery manufacturing, petrochemicals, and transmission pipelines due to its stable mechanical properties, good weldability, and wide processing adaptability.
For purchasers, selecting the most suitable S235JR material among different product forms is a key issue related to cost, quality, and safety.
This article will comprehensively analyze the S235JR product system from four dimensions: performance differences, testing methods, typical applications, and procurement risk control of four product types (steel plates, pipes, round bars, and angle steels). Meanwhile, based on LONGMA’s more than 20 years of production experience and in-house laboratory testing capabilities, it provides more credible material selection recommendations.
Overview of S235JR Basic Properties: Why Is It So Common?
S235JR is a non-alloy structural steel defined by EN 10025-2, with the following naming implications:
- S: Structural (structural steel)
- 235: Nominal yield strength of 235MPa
- JR: Impact energy ≥27 J at 20℃
Whether it is s235jr steel plate, s235jr pipe, s235jr round bar, or s235jr angle steel, their basic material properties remain consistent:
Typical Mechanical Properties of S235JR
| Item | Value (Refer to EN 10025-2) |
| Yield Strength Re | ≥235 MPa |
| Tensile Strength Rm | 360–510 MPa |
| Impact Absorbed Energy | JR (≥27J at 20℃) |
| Elongation A | ≥26% (for steel plates) |
With balanced strength, ductility, and weldability, it has become one of the most cost-effective structural steels in global engineering.
S235JR Steel Plate — Basic Material for Structural Engineering and Equipment Manufacturing
S235JR steel plate is the most in-demand form among S235JR products, with a thickness range from 2mm to 200mm.
Features
- Highly customizable cross-sectional dimensions
- Suitable for various processes such as welding, bending, cutting, and drilling
- Higher uniformity of mechanical properties
- Main material for structural component manufacturing
Typical Application Scenarios
- Bridge steel structure plates
- Machinery equipment bases
- Non-pressure-bearing accessories of pressure vessels
- Container and vehicle structural plates
- Building beams, columns, and floor bearing plates
Key Testing Methods
- Tensile Test: ASTM E8
Used to verify yield strength, tensile strength, and elongation.
- Impact Test: ASTM E23
Verifies JR grade toughness to ensure no brittle fracture in welded areas.
- Ultrasonic Testing (UT)
Particularly important for thick plates, capable of detecting laminar defects.
For projects with high load-bearing requirements, S235JR steel plates must be accompanied by EN 10204 3.1 certificates and UT reports.
S235JR Pipe / S235JR Structural Steel Pipe — Ideal Choice for Structural and Transmission Pipes
As core materials for welding processing and structural connections, S235JR pipe and S235JR structural steel pipe play important roles in buildings, steel structure workshops, and mechanical frames.
Features
- Uniform pipe wall and good weldability
- Available in various types such as cold-drawn, hot-rolled, and welded
- S235JR structural steel pipe has stable strength, suitable for pressure-bearing structural components
Typical Applications
- Workshop structural columns and truss pipes
- Machinery equipment support frames
- Low-pressure fluid transmission pipelines
- Steel structure node reinforcement pipe fittings
Key Inspections
- Hydrostatic Test: Verifies pressure resistance performance
- Weld Ultrasonic Testing (UT): Ensures no incomplete fusion or cracks in weld seams
- Chemical Composition Analysis: Detected by spectrometer
For projects requiring structural stability, do not use cheap substitute pipes from unknown sources; S235JR structural steel pipe is safer and more reliable.
S235JR Round Bar — Universal Material for Machining and Forging
S235JR round bar is widely used in processing turned parts, flange blanks, and small forgings.
Advantages
- Stable processing performance
- Uniform composition control
- Suitable for machining processes such as turning, drilling, and tapping
Typical Uses
- Mechanical components
- Flanges, supports, and connecting blocks
- Forging blanks
S235JR round bar is suitable for parts with low strength requirements but large processing volumes, being both economical and easy to process.
S235JR Angle Steel — Cost-Effective Structural Steel Profile
S235JR angle steel is often used in structural assembly, support systems, and steel structure reinforcement.
Features
- High rigidity
- Flexible installation
- Stable cross-section, suitable for light-load structures
Application Scenarios
- Steel structure support systems
- Auxiliary structural components of power transmission towers
- Engineering reinforcement and secondary structures
In the field of light structures, S235JR angle steel is almost a standard configuration.
Comparison Table of Four S235JR Product Forms
| Product Form | Main Advantages | Typical Applications |
| S235JR Steel Plate | Strong processability, suitable for load-bearing structures | Building steel structures, equipment bases, bridges |
| S235JR Pipe / S235JR Structural Steel Pipe | Stable strength, good weldability | Workshop structural pipes, frame pipes, low-pressure transmission |
| S235JR Round Bar | Easy to process, suitable for turning and forging | Mechanical parts, flanges, forgings |
| S235JR Angle Steel | High rigidity, cost-effective | Support structures, secondary structures, reinforcement components |
How to Ensure Purchasing Genuine S235JR?
The biggest risk in steel procurement is not price, but “unqualified materials passing off as S235JR”.
To avoid this, be sure to require suppliers to provide:
- EN 10204 3.1 Certificate (Mandatory)
Ensures traceability of chemical composition and mechanical properties.
- ASTM E8 Tensile Test Report
Confirms that the strength grade truly meets the S235JR standard.
- ASTM E23 Impact Test Report
Verifies JR impact performance to avoid brittle fracture after welding.
- Supplier’s In-house Laboratory Testing Capabilities (Important)
Able to provide real-time testing videos or third-party witness inspections.
Why Choose LONGMA? (Reliability Matters More Than Price)
As a professional steel pipe and steel supplier with 20 years of manufacturing experience, LONGMA provides S235JR products including:
- Complete Product Range
- S235JR steel plate
- S235JR pipe
- S235JR structural steel pipe
- S235JR round bar
- S235JR angle steel
- In-house Laboratory (Core Advantage)
- Spectrometer for chemical composition testing
- ASTM E8 tensile test
- ASTM E23 impact test
- UT ultrasonic testing
- Provision of third-party accompanying inspections
- Comprehensive Certifications for International Projects
Has supplied S235JR products meeting EN and ASTM standards for projects in Europe, the Middle East, South America, Southeast Asia, etc.
- Technical Team Provides Material Selection Recommendations
Based on project load, welding requirements, and budget, select the most suitable S235JR form and specification for you.
Conclusion
Whether your project involves building steel structures, equipment manufacturing, pipeline engineering, or machining, S235JR offers a high-quality choice combining economy, reliability, and processability. Among various product forms of S235JR:
- Load-bearing structures → S235JR steel plate / S235JR structural steel pipe
- Frames and supports → S235JR pipe / S235JR angle steel
- Machining → S235JR round bar
If you wish to obtain S235JR materials that meet standards, pass inspections, have reliable performance, and are traceable, LONGMA’s in-house laboratory and strict quality control system will help you eliminate all procurement risks.
