The chemical composition of 15MnNiDR mainly includes the elements of C, Si, Mn, Ni, V and Al. Among them, the elemental content of C is in the range of 0.12-0.20%, the elemental content of Si is in the range of 0.15-0.50%, the elemental content of Mn is in the range of 1.20-1.60%, the elemental content of Ni is in the range of 0.30-0.80%, the elemental content of V is in the range of 0.03-0.10%, and the elemental content of Al is in the range of 0.015-0.060%. In addition, the elemental content of P and S in 15MnNiDR shall not be greater than 0.025% and 0.015%, respectively. The contents of these chemical elements have an important influence on the properties and toughness of 15MnNiDR.
15MnNiDR has good mechanical properties, with a tensile strength between 490-620 MPa, a yield strength above 315 MPa, and an elongation above 22%. In addition, 15MnNiDR also has good impact toughness, its impact work at room temperature is not less than 34 J, at -40 ℃ is not less than 27 J. These excellent mechanical properties make 15MnNiDR can meet the requirements of the manufacture of low-temperature pressure vessels.
15MnNiDR is widely used in petroleum, chemical, natural gas and other industries in the manufacture of low-temperature pressure vessels. Due to its good toughness and low-temperature impact properties, it can meet the requirements of working in a low-temperature environment. In addition, 15MnNiDR can also be used in the manufacture of liquefied gas storage tanks, liquefied natural gas storage tanks and other important low-temperature equipment. In the actual application, it is necessary to choose the appropriate material specifications and processing methods according to the specific situation to ensure the quality and safety of the products.
