The A542/A542M-13 steel grade is a specification for pressure vessel plates, alloy steel, quenched and tempered, chromium-molybdenum, and chromium-molybdenum-vanadium. This steel grade is commonly used in the manufacture of high-temperature pressure vessels.
The chemical composition of A542/A542M-13 steel grade is as follows:
– Carbon (C): The maximum carbon content is limited to 0.20%.
– Manganese (Mn): The maximum manganese content is limited to 0.90% to ensure good weldability and formability.
– Phosphorus (P): The maximum phosphorus content is limited to 0.040% to avoid detrimental effects on mechanical properties.
– Sulfur (S): The maximum sulfur content is limited to 0.040% to avoid detrimental effects on mechanical properties.
– Silicon (Si): The maximum silicon content is limited to 0.15% to ensure good weldability and formability.
– Chromium (Cr): The minimum chromium content is 0.60% for A542/A542M-13 Grade A and 2.00% for A542/A542M-13 Grade B/C. Chromium improves the corrosion resistance and high-temperature strength of the steel.
– Molybdenum (Mo): The minimum molybdenum content is 0.25% for A542/A542M-13 Grade A and 0.50% for A542/A542M-13 Grade B/C. Molybdenum enhances the high-temperature strength and creep resistance of the steel.
– Vanadium (V): The minimum vanadium content is 0.030% for A542/A542M-13 Grade B/C. Vanadium improves the strength and toughness of the steel.
The mechanical properties of A542/A542M-13 steel grade depend on the specific grade within the specification. However, generally, the minimum tensile strength for Grade A is 690 MPa (100 ksi), and for Grade B/C, it is 760 MPa (110 ksi). The minimum yield strength for Grade A is 485 MPa (70 ksi), and for Grade B/C, it is 585 MPa (85 ksi). The elongation at break for both grades is a minimum of 18%.
Overall, A542/A542M-13 steel grade is a high-strength, alloy steel grade suitable for use in high-temperature pressure vessel applications. Its composition and mechanical properties make it capable of withstanding high temperatures and pressures while maintaining its strength and integrity.