BS4360: British Standard for low and medium carbon structural steel

BS4360 is a British Standard for low and medium carbon structural steel that was published in 1968 and revised in 1990. The standard specifies the requirements for hot-rolled and forged steel bars, plates, and sections that are used in general construction, engineering, and structural applications.

BS4360 covers a wide range of steel grades, including:

• Grade 40A: This is a low carbon steel with a tensile strength of 410-560 MPa and a yield strength of 235 MPa.
• Grade 43A: This is a low carbon steel with a tensile strength of 430-580 MPa and a yield strength of 275 MPa.
• Grade 50B: This is a medium carbon steel with a tensile strength of 490-640 MPa and a yield strength of 355 MPa.
• Grade 55C: This is a medium carbon steel with a tensile strength of 550-700 MPa and a yield strength of 380 MPa.
• Grade 60C: This is a medium carbon steel with a tensile strength of 600-760 MPa and a yield strength of 420 MPa.
• Grade 65C: This is a medium carbon steel with a tensile strength of 650-820 MPa and a yield strength of 460 MPa.

The various grades of BS4360 steel are differentiated by their chemical composition and mechanical properties. They are commonly used in structural applications such as bridges, buildings, and construction equipment.

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.