DIN 17100 ST70-2 steel plate properties and application

DIN 17100 ST70-2 is a structural steel plate that is used in various engineering and construction applications. Here are some important properties and applications of DIN 17100 ST70-2 steel plate:

1. Equivalent grades

   Europe En10025(93)	France NFA35-501	U.K. BS4360	Italy UNI7070	China GB	Japan JIS3106
   E360	A70-2		Fe 690	Q355

2. Chemical Composition: DIN 17100 ST70-2 steel plate contains primarily carbon (C), manganese (Mn), and silicon (Si) as its major alloying elements. It may also contain small amounts of other elements such as phosphorus (P), sulfur (S), and copper (Cu).
3. Carbon (C): 0.14-0.20%
4. Silicon (Si): 0.15-0.55%
5. Manganese (Mn): 0.60-1.70%
6. Phosphorus (P): 0.035% max
7. Sulfur (S): 0.035% max
8. Copper (Cu): 0.25% max (if specified)
9. Mechanical Properties: The mechanical properties of DIN 17100 ST70-2 steel plate include a minimum yield strength of 690 MPa and a minimum tensile strength of 770-940 MPa. The elongation at break is typically around 14%.
10. Applications: DIN 17100 ST70-2 steel plate is primarily used in structural applications such as bridges, buildings, and heavy machinery. It is also used in the construction of offshore platforms and in the manufacturing of pressure vessels and boilers.
11. Weldability: DIN 17100 ST70-2 steel plate is generally considered to be weldable using common welding techniques like gas metal arc welding (GMAW) and shielded metal arc welding (SMAW). However, it is important to take proper precautions to avoid issues such as cracking or porosity.
12. Corrosion Resistance: DIN 17100 ST70-2 steel plate is not designed for corrosion resistance and may corrode in certain environments. However, it can be coated or painted to enhance its corrosion resistance.

Overall, DIN 17100 ST70-2 steel plate is a high-strength structural steel that is suitable for various engineering and construction applications. Its high yield and tensile strength make it ideal for use in heavy-duty applications such as bridges and buildings.