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E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
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Grade: S355J2G3 1.0570
S355J2G3 is a non-alloy structural steel grade conforming to EN10250-2, with its chemical composition precisely formulated to achieve an optimal balance among strength, toughness, and fabricability. The carbon content is maintained at ≤0.22% to enhance crack resistance in welded joints and mitigate hardening tendencies within the heat-affected zone. Manganese, present at ≤1.60%, contributes solid-solution strengthening to compensate for the strength reduction associated with the lower carbon level. Silicon (≤0.55%) acts as a deoxidizing agent that refines the steel matrix, while residual elements such as phosphorus and sulfur are strictly limited to ≤0.035% each, collectively ensuring stable impact performance at -20°C.
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S355J2G3
Qilu
S355J2G3 steel is strictly defined by the European standard system, with each character having a specific meaning to facilitate engineers' quick identification of material properties:
S: Represents structural steel
355: Indicates its minimum yield strength of 355 MPa (applicable to thicknesses ≤16mm)
J2: Requires the material to have an impact energy of not less than 27J in an impact test at -20℃, demonstrating excellent low-temperature toughness
G3: Represents a specific deoxidation method (belonging to semi-killed or special-killed steel), distinguishing it from the fully killed steel of G4
S355J2G3 replaces outdated St52-3 steel, with matching performance to GB Q355D, ASTM A992 structural steel, widely recognized by global engineering contractors, machinery manufacturers and offshore fabricators. This steel is typically delivered in normalized or normalized rolled condition, ensuring uniform microstructure and stable mechanical properties.
Country | Europe |
Standard | EN10250-2 |
Grade | S355J2G3/1.0570 |
Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Al | Cr+Mo +Ni |
S355J2G3/ 1.0570 | 0.22 Max | 0.55 Max | 1.60 Max | 0.035 Max | 0.035 Max | 0.30 Max | 0.08 Max | 0.30 Max | 0.020 Min | 0.48 Max |
1. Yield Strength (ReH)
Thickness ≤16mm: ≥355MPa
16–40mm: ≥345MPa
40–150mm: ≥335MPa
Over 150mm: ≥325MPa
2. Tensile Strength (Rm): 450–680MPa
3. Elongation: ≥21%
4. Impact Test: 27J minimum Charpy impact value at -20℃, stable toughness in cold climate construction, mining machinery and northern offshore projects
Mechanical properties for S355J2G3 open die forgings steel in the normalized or normalized and tempered conditions according to EN10250-2.
Size range | Tensile strength | Yield strength | Alongation | Impact value at RT/J | ||
L | Tr | L | Tr | |||
d≤100 | 490Mpa Min | 315Mpa Min | 20% Min | / | 35J Min | / |
| 100<d≤250 | 450Mpa Min | 275Mpa Min | 18% Min | 12% Min | 30J Min | 20J Min |
| 250<d≤500 | 450Mpa Min | 265Mpa Min | 18% Min | 12% Min | 27J Min | 15J Min |
Remark: L= Longitudinal Tr = Transverse
Product type | Size range | Length |
Cold drawn bar | Φ3-Φ80mm | 6000-9000mm |
Hot rolled bar | Φ16-Φ300mm | 6000-9000mm |
Hot forged bar | Φ100-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:3-200mm; W:1500-2500mm | 2000-5800mm |
Hot Forged block | T: 80-800mm; W: 100-2500mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Stock Information: Qilu Steel has monthly stocks of over 10,000 tons of hot-rolled and forged bars, with stock diameters ranging from 20mm to 300mm. Stock availability changes daily, please contact our sales team for real-time inventory.
S355J2G3 is the preferred structural material for heavy-duty, low-temperature load-bearing projects worldwide:
Bridge girders, building steel frames, high-rise support beams, stadium structures
Excavator frames, crane booms, forklift components, bulldozer parts, hydraulic cylinder forgings
Offshore platform secondary structures, ship hull frames, marine equipment brackets
Freight wagon frames, railway bridge components, trailer chassis, truck dump bodies
Wind turbine support frames, power plant steel structures, pipeline support brackets
Shafts, connecting rods, hydraulic blocks, heavy-duty fastener blanks, mining equipment components
S355J2G3: normalized semi-killed steel with controlled deoxidation, consistent internal quality
S355J2: can be hot rolled without mandatory normalization, less stable low-temperature toughness for heavy loads.
G3: semi-killed steel, lower cost for general heavy structures
G4: fully killed steel for ultra-high fatigue critical components (pressure vessels, high-cycle mechanical parts)
A1: W.Nr. 1.0570, old EN 10025-2 grade, equivalent to modern normalized S355J2+N structural steel.
A2: Closely matched GB/T 1591 Q355D low alloy high strength steel.
A3: Yes, J2 specification requires minimum 27J impact energy at -20°C, ideal for cold region construction and outdoor machinery.
A4: Standard normalized (+N) rolling delivery, uniform fine grain structure to optimize mechanical performance.
A5: Yes, low carbon equivalent minimizes welding cold crack risk, compatible with all common welding processes.
S355J2G3 steel is a reliable and easy-to-weld European standard structural steel. When selecting materials, paying close attention to its thickness effects and details regarding equivalent substitutions with other standards (such as the Chinese national standard Q355D) can help you better control design costs and quality. Please feel free to contact us for the latest inventory and pricing information.
