S235JR steel is a common European standard non-alloy structural steel (EN 10025-2) with a minimum yield strength of 235 MPa, suitable for general structural applications. It possesses good weldability and toughness, and is therefore widely used in construction, bridges, and machinery manufacturing, typically supplied in the form of plates, beams, and channel steel.
Meaning of the Name "S235JR" Steel
S235JR is a non-alloy structural carbon steel, with its grade carrying clear performance indicators.
The "S" in its grade stands for "Structural Steel", indicating its primary application in load-bearing structures; "235" refers to the minimum yield strength of 235 MPa (for plates with thickness ≤16mm); "JR" means it meets the impact toughness requirement of ≥27J at room temperature (+20℃) with a V-notch, ensuring it avoids brittle fracture under normal operating conditions.
Chemical Composition of S235JR Steel
| Element | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| Content | 0.17 | 0.35 | 1.40 | 0.035 | 0.035 |
Mechanical Properties of S235JR Steel
| Property | Value | Notes |
|---|---|---|
| Yield Strength (ReH) | 235 MPa (≤16mm) | Decreases with thickness (e.g., 195 MPa for 100-125mm) |
| Tensile Strength (Rm) | 360 – 510 MPa | Standard range for most thicknesses |
| Elongation (A5) | ≥ 26% | Excellent ductility for cold forming |
| Impact Energy | 27 J at +20°C | 'JR' designation; good room-temperature toughness |
Key Advantages of S235JR Steel
Excellent Weldability: Due to its low carbon content, it is easily welded using all standard techniques (MIG, TIG, MAG) without requiring preheating, making it ideal for on-site construction and manufacturing.
Cost-Effective and Readily Available: S235JR is relatively inexpensive compared to higher-strength steel grades, offering a budget-friendly solution for structural projects.
Good Toughness and Ductility: The "JR" designation indicates it passes Charpy V-notch impact tests at 20°C (27 Joules minimum), ensuring reliability in structural applications that face moderate shock or dynamic loads.
Superior Processability: It is highly machinable and can be easily formed, cut, and shaped into various profiles, including plates, beams, and rods.
Versatility in Application: It is suitable for diverse uses, including building structures, automobile parts, transportation infrastructure, and general engineering components.
What is the difference between S235JR and S355JR?
The primary difference between S235JR and S355JR steel is their yield strength and suitable applications. S355JR is stronger and ideal for heavy, high-load structures, while S235JR is more ductile, economical , and suited for general-purpose, lighter construction. Both are European standard, hot-rolled structural steels with identical impact toughness (JR).
(1)Yield Strength: S355JR has a minimum yield strength of 355 MPa, roughly 50% higher than S235JR (235 MPa).
(2)Tensile Strength: S355JR offers 470–630 MPa, while S235JR offers 360–510 MPa.
(3)Application: S235JR is used for light steel structures, residential building frames, and general engineering. S355JR is preferred for bridges, high-rise buildings, heavy machinery, and crane construction.
(4)Efficiency: Using S355JR allows for thinner sections in design, reducing the total weight of the structure.
What is S235JR steel used for?
S235JR steel is favored for its good weldability, ductility and cost-effectiveness, and is especially suitable for projects with moderate strength requirements:
Construction & Civil Engineering: Used for residential/industrial steel structures, building frames, bridges, pylons, and tower construction.
Manufacturing & Machinery: Components like frames, brackets, supports, gears, and shafts in machinery.
Automotive & Transportation: Chassis parts and trailer frames.
Shipbuilding & Offshore: Hulls, superstructures, and components for marine vessels and platforms.
Infrastructure: Pipelines for liquid transport and storage tanks.
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| Material Grade | S235JR(1.0038) |
| Standard | GB,ASTM,DIN,JIS,NF,BS,ISO,ROCT |
| Thickness | 0.1mm-300mm or as required |
| Width | 1000-5000mm,such as 1220mm 1250mm 1500mm (as customer's required) |
| Length | 1-12m,such as 2440mm 2500mm 3000mm or as required |
| Surface | Black painting, varnish paint, anti rust oil, hot galvanized, cold galvanized, 3PE,ect |
| Technique | Hot Rolled /Cold Rolled |
| Application | Ship building Industry , building construction,bridge, architecture,pressure vessel steel,etc. |
| Trade Terms | EXW,FOB,CIF CFR |
| Loading Port | Shanghai port, Tianjin port, Qindao port |
| Payment terms | 1) 30% deposit by T/T, the balance against copy of B/L by T/T. |
| 2) 30% deposit by T/T, the balance by L/C at sight. | |
| 3) 100% L/C at sight. | |
| MOQ | 2 Ton |
| Packing Detail | Standard Seaworthy Package or customer requirements |
| Delivery time | 1.Usually,within10-20days after receiving deposit or LC. 2.According to the order quantity |
| Samples | Free samples are provided but the fright is borne by the buyer |
What is S235JR steel?
Steel grade S235JR is a popular general construction and machine steel that is made in accordance with the EN 10025-2 standard. Classification: Non-alloy structural steel. Products: Semi-finished products, long products and sheet hot-rolled products, wire rod and forgings.
What is S235JR material equivalent to?
Its equivalents include ASTM A36 in the US, JIS SS400 in Japan, and ISO E235B in Europe, all providing similar structural capabilities suitable for general engineering and construction applications.
Is S235JR material stainless steel?
S235JR is classified as a non-alloy structural steel, specifically designed for use in construction and structural applications. The designation "S235" indicates a minimum yield strength of 235 MPa, while the "JR" suffix denotes that the steel has undergone a Charpy V-notch impact test at a temperature of 20°C.
What is the difference between A36 and S235JR?
ASTM A36 generally offers slightly higher yield strength than S235JR and SS400, especially for thicker sections. S235JR and SS400 have similar tensile strengths but may vary slightly based on thickness and manufacturing. ASTM A36 has stricter limits on carbon content (≤0.26%), ensuring consistent quality.