ASTM A240 Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and General Applications

ASTM A240 Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and General Applications

ASTM A 240 method covers the chemical composition, mechanical properties, and specification for materials such as ferritic, austenitic, martensitic, Duplex, Super duplex and high moly stainless steel alloys.

    Scope:

    This specification covers chromium, chromium-nickel, and chromium-manganese-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications. 

    Test procedure:

    ASTM A240 is used to determine the standard specification for chemical composition and mechanical properties for the material. For Chemical composition, the Composition of carbon, manganese, phosphorous, sulfur, chromium, nickel, molybdenum, copper and other elements are determined. For the mechanical properties, tensile strength, yield strength, elongation hardness, and cold bend is determined. Yield strength is determined by the offset method at 0.2 %. an alternative method of determining yield strength may be based on the total extension under the load of 0.5 %.

    Test Specimen:

    The orientation of the specimens shall be longitudinal (long axis of the specimen parallel to the final rolling direction, the root of the notch perpendicular to the rolling face).

    Data:

    Table no: 1 Chemical Composition Requirements, %A

    Table 2: Mechanical test Requirement

    Conclusion:

    Hence, we can say that ASTM A240 gives detailed and thorough information regarding the chemical as well as mechanical test requirements for various types of steel.

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