ASTM A990-05 - 1.3.2005
 
1. Scope

1.1 This specification covers iron-nickel-chromium and nickel alloy castings specially processed with restricted melt practices, weldability testing, and nondestructive examination (NDE) requirements.

1.2 A number of grades of iron-nickel-chromium and nickel alloy castings are included in this specification. Since these grades possess varying degrees of suitability for service in corrosive environments, it is the responsibility of the purchaser to determine which grade shall be furnished. Selection will depend on design and service conditions, mechanical properties, and corrosion-resistant characteristics.

1.3 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 
2. Referenced Documents

A351/A351M-24e1

Standard Specification for Castings, Austenitic, for Pressure-Containing Parts (Includes all amendments and changes 2/3/2025).

E186-20(2026)

Standard Reference Radiographs for Heavy-Walled (2 to 412 in. (50.8 to 114 mm)) Steel Castings

A488/A488M-24

Standard Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel

A494/A494M-26

Standard Specification for Castings, Nickel and Nickel Alloy

A703/A703M-20a

Standard Specification for Steel Castings, General Requirements, for Pressure-Containing Parts (Includes all amendments and changes 11/16/2020).

A743/A743M-21

Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application

A744/A744M-21a

Standard Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service (Includes all amendments and changes 11/10/2021).

A941-26a

Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys (Includes all amendments and changes 4/15/2026).

A802-A802M-95(2001)

Standard Practice for Steel Castings, Surface Acceptance Standards, Visual Examination

A903/A903M-99(2024)

Standard Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant Inspection

A985/A985M-26

Standard Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts

E94-04

Standard Guide for Radiographic Examination

E272-21

Standard Reference Radiographs for High-Strength Copper-Base and Nickel-Copper Alloy Castings

E280-21(2026)

Standard Reference Radiographs for Heavy-Walled (412 to 12 in. (114 to 305 mm)) Steel Castings

E446-20(2026)

Standard Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness

E165-09

Standard Practice for Liquid Penetrant Examination for General Industry

A370-26

Standard Test Methods and Definitions for Mechanical Testing of Steel Products