The A612/A612M-12 steel grade is a standard specification for pressure vessel plates, carbon-manganese-silicon steel, intended for welded pressure vessels in moderate and lower temperature service. This steel grade has good notch toughness and is suitable for environments with moderate to low temperatures.
The chemical composition of A612/A612M-12 steel grade is as follows:
– Carbon (C): 0.25%
– Manganese (Mn): 1.00-1.50%
– Silicon (Si): 0.15-0.50%
– Phosphorus (P): 0.035%
– Sulfur (S): 0.035%
The mechanical properties of this steel grade include a minimum yield strength of 345 MPa (50 ksi) and a tensile strength of 550-690 MPa (80-100 ksi). It also has a minimum elongation of 21% in 200 mm (8 inches) and 25% in 50 mm (2 inches).
The A612/A612M-12 steel grade is primarily used in the fabrication of pressure vessels where notch toughness is required. It is commonly used in applications such as reactors, tanks, and boilers in the oil, gas, and petrochemical industries. It is also used in power generation plants, chemical processing plants, and other industries where high strength and good notch toughness are necessary for safe and reliable operation under moderate to low temperatures.
Overall, the A612/A612M-12 steel grade offers good mechanical properties and notch toughness, making it suitable for various pressure vessel applications in moderate and lower temperature environments.