What is 1.0570 (S355J2G3)
The 1.0570 is an unalloyed structural steel in which the notch impact bending tests can be carried out even at -20°C, with the target value of 27 J in longitudinal samples and 15 J for transverse samples. The thickness of the relevant cross-section is 250 to 500 mm. The Norm also distinguishes the wall thickness gradations below 100 mm; 100 to 250 mm and then up to 500 mm dependable on the wall thickness of the mechanical property values.
The 1.0570 is also known under the old classification St52-3 and is comparable in the American language to the AISI 1024 (ASTM A29).
International identifiers
Properties of the material 1.0570 (S355J2G3)
Properties
| Welding suitability | good |
| Machinability | 8 (1 = bad - 10 = good) |
Welding
- Weldable using all common welding processes
- Stress relieving after welding is recommended
- Temperature: 550–580 °C
Machining
- Unrestricted machinability in the delivery condition
- Suitable for high material removal rates
Special properties
- Preferably used in the temperature range between 300°C and -10°C
- Magnetizable
Physical properties
| 1.0570 Density in kg/dm3 | 7,85 |
| Electrical resistance at 20°C in (Ω mm2)/m | 0,15 bis 0,17 |
| Thermal conductivity at 20°C in W/(m K) | 54 |
| Thermal conductivity at 500°C in W/(m K) | 33,4 |
| Specific heat capacity at 20°C in J/(kg K) | 461 |
| Elasticity at 20°C (GPa) | 210 |
Processing
| Cold forming | is possible |
| Chip-making processing | is possible |
| Free-form and die-forging | is possible |
| Automatic machining | is not possible |
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Heat treatment 1.0570
The heat treatment (normalization) of the 1.0570 steel is carried out by a normal annealing in the range 890-950°C with cooling on still air.
| Temperature in °C | Cooling | |
| Hot forming | 1050 - 850 | Air |
Chemical composition of 1.0570
| 1.0570 S355J2G3 | C | Si | Mn | P | S | Cr | Mo | Ni | Al |
|---|---|---|---|---|---|---|---|---|---|
| min. | 0,020 | ||||||||
| max. | 0,22 | 0,55 | 1,60 | 0,035 | 0,035 | 0,30 | 0,08 | 0,30 |
Areas of application for 1.0570
Instructions for use
- For components used in general mechanical and plant engineering
- For versatile components of various types
- For components requiring reliable mechanical properties
- Suitable for structural components in various applications
Areas of application
- General mechanical engineering
- Plant and equipment engineering
- Gear housings
- Bushing components for shipbuilding
- Push rods
- Roller bodies
- Other structural components of various types
Form of supply and availability of 1.0570
In stock
Immediately available from stock
Form of supply
Flat, forged, normalized
Sawn blank
The processing with the saw is a mechanical processing of the material, which results in a significantly lower unintended deformation and increased hardness for the existing structure, such as the thermal cutting.
Thus, the machined workpiece has a homogeneous structure even at the edge, which does not change in the continuation of the material.
This circumstance allows immediate finishing of the workpiece with milling or drilling . So it is not necessary to anneal the material or make a similar operation beforehand.
Frequently asked questions about material 1.0570:
Normally, no heat treatment is required, as the material is supplied in the normalized condition. In the case of extensive machining or complex shapes, stress relieving is recommended.
Yes, it is very easily weldable, as its carbon content is below 0.22%.
In mechanical engineering for load-bearing elements and base plates, in steel and bridge construction for robust structures subject to high loads, and in tool and mold making as assembly, intermediate, or head plates.
1.0570 was formerly designated as St52-3 or St52.
Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!