Standard Specification for Castings, Nickel and Nickel Alloy
Standard Specification for Castings, Nickel and Nickel Alloy
ABSTRACT This specification covers nickel, nickel-copper, nickel-copper-silicon, nickel-molybdenum, nickel-chromium, and nickel-molybdenum-chromium alloy castings for corrosion resistant service. The castings shall be heat treated. When Class 1 is specified, grades CY40 and M25S shall be supplied in the as-cast condition. When Class 2 is specified, grades CY40 and M25S shall be supplied in the solution treated condition. When Class 3 is specified, grade M25S shall be supplied in the age-hardened condition. The chemical composition requirements of the alloys are presented. The tensile property requirements including the heat treatment procedure for the castings are presented in detail. It is required that one tension test shall be made from each master heat except for grades M25S and CY5SnBiM when the master heat is used to pour the castings. One tension test shall be made from each melt except for grades M25S and CY5SnBiM. Test results shall conform to the specified tensile requirements. SCOPE 1.1 This specification covers nickel, nickel-copper, nickel-copper-silicon, nickel-molybdenum, nickel-chromium, and nickel-molybdenum-chromium alloy castings for corrosion-resistant service. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM A494/A494M-22 standard specifies the requirements for nickel, nickel-copper, nickel-copper-silicon, nickel-molybdenum, nickel-chromium, and nickel-molybdenum-chromium alloy castings intended for corrosion-resistant service. Developed by ASTM International, this specification ensures castings exhibit the necessary chemical composition, mechanical properties, and heat treatment for use in severe environments where corrosion resistance is essential. This standard is widely referenced across industries such as chemical processing, marine, oil and gas, and power generation.
ASTM A494/A494M-22 is critical for sectors where resistance to corrosive media is vital:
Другие стандарты ASTM
Selecting castings compliant with this standard ensures superior performance, safety, and service life in demanding applications.
Several ASTM and international standards are referenced or applicable alongside ASTM A494/A494M-22 to ensure comprehensive control over production and testing:
Each referenced document covers procedures and criteria essential for fulfilling the chemical and mechanical property requirements, test controls, and quality assurance of nickel and nickel alloy castings.
Keywords: ASTM A494, nickel alloy castings, corrosion-resistant castings, nickel-copper castings, nickel-molybdenum castings, nickel-chromium castings, mechanical properties, chemical composition, industrial standards.