ASTM A995/A995M-20
Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts

Standard No.

ASTM A995/A995M-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM A995/A995M-20

Scope

1.1 This specification covers austenitic-ferritic (duplex) stainless steel castings for valves, flanges, fittings, and other pressure-containing parts. 1.2 The duplex stainless steels offer a combination of enhanced mechanical properties and corrosion resistance when properly balanced in composition and properly heat treated. Ferrite levels are not specified, but these grades will develop a range of approximately 30 to 60 % ferrite with the balance austenite. It is the responsibility of the purchaser to determine which grade shall be furnished depending on design and service conditions, mechanical properties, and corrosionresistant characteristics. NOTE 1—Because of the possibility of precipitation of embrittling phases, the grades included in this specification are not recommended for service at temperatures above 600 °F [315 °C]. 1.3 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. 1.4 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 A995/A995M-20 Referenced Document

• ASTM A488/A488M Standard Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
• ASTM A703/A703M Standard Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
• ASTM E125 Standard Reference Photographs for Magnetic Particle Indications on Ferrous Castings*， 2023-06-01 Update
• ASTM E165/E165M Standard Practice for Liquid Penetrant Testing for General Industry
• ASTM E562 Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count
• ASTM G48 Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution

ASTM A995/A995M-20 history

• 2020 ASTM A995/A995M-20 Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2019 ASTM A995/A995M-19 Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2018 ASTM A995/A995M-18a Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2018 ASTM A995/A995M-18 Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2013 ASTM A995/A995M-13 Standard Specification for Castings, Austenitic-Ferritic lpar;Duplexrpar; Stainless Steel, for Pressure-Containing Parts
• 2012 ASTM A995/A995M-12a Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2012 ASTM A995/A995M-12e1 Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2012 ASTM A995/A995M-12 Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2009 ASTM A995/A995M-09 Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 1998 ASTM A995/A995M-98(2007) Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 1998 ASTM A995/A995M-98(2003) Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
• 2021 ASTM A995-98 Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts