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ASTM A995/A995M-13

(Specification)

Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts

Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts

ABSTRACT
This specification covers austenitic-ferritic (duplex) stainless steel castings for valves, flanges, fittings, and other pressure-containing parts. The grades of steels covered here are: Grade 1B, Grade 2A, Grade 3A, Grade 4A, Grade 5A, and Grade 6A. The steel castings shall be heat-treated up to required temperature and shall undergo water quenching or rapid cooling by other means after heating. Heat and product analyses shall be performed wherein specimens shall conform to required chemical composition of carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. All steels shall undergo tension test, and shall conform to the following mechanical requirements: tensile strength, yield strength, and elongation.
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 corrosion-resistant 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 non-conformance with the standard.

General Information

Status
Historical
Publication Date
30-Nov-2013
ICS
77.140.80 - Iron and steel castings
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.18 - Castings
Current Stage
Ref Project

Relations

Replaces
ASTM A995/A995M-12a - Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
Effective Date
01-Dec-2013
Replaced By
ASTM A995/A995M-18 - Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
Effective Date
01-Jan-2018
Referred By
ASTM A351/A351M-18e1 - Standard Specification for Castings, Austenitic, for Pressure-Containing Parts
Effective Date
01-Dec-2013
Referred By
ASTM A488/A488M-18e2 - Standard Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
Effective Date
01-Dec-2013
Referred By
ASTM F998-12(2022) - Standard Specification for Centrifugal Pump, Shipboard Use
Effective Date
01-Dec-2013
Referred By
ASTM A703/A703M-20a - Standard Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
Effective Date
01-Dec-2013
Referred By
ASTM A985/A985M-21 - Standard Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
Effective Date
01-Dec-2013

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ASTM A995/A995M-13 - Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing PartsASTM A995/A995M-13 - Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
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REDLINE ASTM A995/A995M-13 - Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing PartsREDLINE ASTM A995/A995M-13 - Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
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Technical specification
REDLINE ASTM A995/A995M-13 - Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A995/A995M −13
Standard Specification for
Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for
1
Pressure-Containing Parts
This standard is issued under the fixed designationA995/A995M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* E165 Practice for Liquid Penetrant Examination for General
Industry
1.1 This specification covers austenitic-ferritic (duplex)
E562 Test Method for Determining Volume Fraction by
stainless steel castings for valves, flanges, fittings, and other
Systematic Manual Point Count
pressure-containing parts.
3. Terminology
1.2 The duplex stainless steels offer a combination of
enhanced mechanical properties and corrosion resistance when
3.1 Definitions of Terms Specific to This Standard:
properly balanced in composition and properly heat treated.
3.1.1 duplex stainless steel—an iron-chromium-nickel-
Ferrite levels are not specified, but these grades will develop a
molybdenum alloy which when properly heat treated consists
range of approximately 30 to 60 % ferrite with the balance
of approximately 30 to 60 % ferrite with the balance austenite.
austenite. It is the responsibility of the purchaser to determine
4. General Conditions for Delivery
which grade shall be furnished depending on design and
service conditions, mechanical properties, and corrosion-
4.1 Material furnished to this specification shall conform to
resistant characteristics.
the applicable requirements of Specification A703/A703M,
including the supplementary requirements that are indicated on
NOTE 1—Because of the possibility of precipitation of embrittling
phases, the grades included in this specification are not recommended for the purchaser order. Failure to comply with the general
service at temperatures above 600°F [315°C].
requirements of Specification A703/A703M constitutes non-
conformance with this specification. In case of conflict be-
1.3 The values stated in either SI units or inch-pound units
tween the requirements of the specification and Specification
are to be regarded separately as standard. The values stated in
A703/A703M, this specification shall prevail.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
5. Ordering Information
values from the two systems may result in non-conformance
5.1 It is the responsibility of the purchaser to specify all
with the standard.
requirements that are necessary for material ordered under this
specification. Such requirements may included, but are not
2. Referenced Documents
limited to, the following:
2
2.1 ASTM Standards:
5.1.1 A description of the casting by pattern number or
A488/A488M Practice for Steel Castings, Welding, Qualifi-
drawing (dimensional tolerances shall be included on the
cations of Procedures and Personnel
casting drawing),
A703/A703M Specification for Steel Castings, General
5.1.2 Quantity (weight and number of castings),
Requirements, for Pressure-Containing Parts
5.1.3 Specification designation and date of issue,
E125 Reference Photographs for Magnetic Particle Indica-
5.1.4 Grade of steel,
tions on Ferrous Castings
5.1.5 Supplementary requirements including acceptance
criteria, and
5.1.6 Additional requirements.
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee 6. Process
A01.18 on Castings.
6.1 The steel shall be made by the electric furnace process
Current edition approved Dec. 1, 2013. Published December 2013. Originally
approved in 1998. Last previous edition approved in 2012 as A995/A995M – 12a. with or without separate refining.
DOI: 10.1520/A0995_A0995M-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Heat Treatment
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 All castings shall be heat treated in accordance with
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Table 1.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A995/A995M − 13
TABLE 1 Heat Treatment Requirements
10. Quality
Grade Heat Treatment
10.1 When additional inspection is desired, Supplementary
1B Heat to 1900°F [1040°C] minimum, hold for sufficient time to heat
Requirements S5, S6, and S10 may be ordered.
casting uniformly to temperature, quench in water or rapid cool by
other mean
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A995/A995M − 12a A995/A995M − 13
Standard Specification for
Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for
1
Pressure-Containing Parts
This standard is issued under the fixed designation A995/A995M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. 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 corrosion-resistant 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 non-conformance with the standard.
2. Referenced Documents
2
2.1 ASTM Standards:
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
E125 Reference Photographs for Magnetic Particle Indications on Ferrous Castings
E165 Practice for Liquid Penetrant Examination for General Industry
E562 Test Method for Determining Volume Fraction by Systematic Manual Point Count
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 duplex stainless steel—an iron-chromium-nickel-molybdenum alloy which when properly heat treated consists of
approximately 30 to 60 % ferrite with the balance austenite.
4. General Conditions for Delivery
4.1 Material furnished to this specification shall conform to the applicable requirements of Specification A703/A703M,
including the supplementary requirements that are indicated on the purchaser order. Failure to comply with the general
requirements of Specification A703/A703M constitutes nonconformance with this specification. In case of conflict between the
requirements of the specification and Specification A703/A703M, this specification shall prevail.
5. Ordering Information
5.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this
specification. Such requirements may included, but are not limited to, the following:
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved Nov. 1, 2012Dec. 1, 2013. Published December 2012December 2013. Originally approved in 1998. Last previous edition approved in 2012 as
ε1
A995/A995M – 12A995/A995M – 12a. . DOI: 10.1520/A0995_A0995M-12A.10.1520/A0995_A0995M-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A995/A995M − 13
TABLE 1 Heat Treatment Requirements
Grade Heat Treatment
1B Heat to 1900°F [1040°C] minimum, hold for sufficient time to heat
casting uniformly to temperature, quench in water or rapid cool by
other means.
2A Heat to 2050°F [1120°C] minimum, hold for sufficient time to heat
casting uniformly to temperature, quench in water or rapid cool by
other means.
3A Heat to 1950°F [1070°C] minimum, hold for sufficient time to heat
casting uniformly to temperature, quench in water or rapid cool by
other me
...

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Note 1: For heat-resisting alloys used for special product application, reference should be made to Specifications A351/A351M, A217/A217M, and A447/A447M.  
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.

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ASTM
ASTM A487/A487M-21(Specification)
Standard Specification for Steel Castings Suitable for Pressure Service

ABSTRACT
This specification covers low-alloy steel and martensitic stainless steels in the normalized and tempered, or quenched and tempered conditions, suitable for pressure-containing parts. All castings shall receive the specified heat treatment requirement: austenitizing temperature, medium, quenching cool, and tempering temperature. Preliminary heat treatment and multiple tempering are permitted. Recording-type pyrometers shall be used to control the furnace temperature. The steel shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, boron, and copper. Residual elements include: copper, nickel, chromium, tungsten, molybdenum, and vanadium. Tensile properties of the steel shall conform to the requirements for tensile strength, yield strength, elongation, reduction of area, hardness, and maximum thickness. Product analysis tolerance is specified. Repair by welding may be done.
SCOPE
1.1 This specification2 covers low-alloy steels and martensitic stainless steels in the normalized and tempered, or quenched and tempered, condition suitable for pressure-containing parts. The weldability of the classes in this specification varies from readily weldable to weldable only with adequate precautions, and the weldability of each class should be considered prior to assembly by fusion welding.  
1.2 Selection will depend on design, mechanical, and service conditions. Users should note that hardenability of some of the grades mentioned may restrict the maximum size at which the required mechanical properties are obtained.  
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.  
1.3.1 Within the text, the SI units are shown in brackets.  
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.

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ASTM
ASTM A781/A781M-21(Specification)
Standard Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use

ABSTRACT
This specification covers a group of common requirements that, unless covered by the individual product specification in another ASTM document, applies to steel and alloy castings for use in general industrial applications. Materials shall be produced by open-hearth or electric furnace process with or without separate refining, such as argon-oxygen-decarburization (AOD), and then consequently heat treated in the working zone. Castings shall receive heat and product analysis to evaluate their conformance to chemical composition requirements. Mechanical requirements shall also be assessed. The surfaces of castings shall be free of adhering sand, scale, cracks, hot tears, and other surface discontinuities. Repair welding may be performed as required.
SCOPE
1.1 This specification covers a group of requirements that are mandatory requirements of the following steel casting specifications issued by ASTM. If the product specification specifies different requirements, the product specification shall prevail.    
ASTM
Designation  
Title of Specification  
A27/A27M  
Steel Castings, Carbon, for General Application  
A128/A128M  
Steel Castings, Austenitic Manganese  
A148/A148M  
Steel Castings, High Strength, for Structural Purposes  
A297/A297M  
Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application  
A447/A447M  
Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service  
A494/A494M  
Castings, Nickel and Nickel Alloy  
A560/A560M  
Castings, Chromium-Nickel Alloy  
A743/A743M  
Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application  
A744/A744M  
Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service  
A747/A747M  
Steel Castings, Stainless, Precipitation Hardening  
A890/A890M  
Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application    
A915/A915M  
Steel Castings, Carbon and Alloy, Chemical Requirements Similar to Standard Wrought Grades  
A958/A958M  
Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similiar to Standard Wrought Grades  
A1002  
Castings, Nickel-Aluminum Ordered Alloy  
1.2 This specification also covers a group of supplementary requirements that may be applied to the above specifications as indicated therein. These are provided for use when additional testing or inspection is desired and apply only when specified individually by the purchaser in the order.  
1.3 The requirements of the individual material specification and this general specification shall prevail in the sequence named.  
1.4 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.  
1.5 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.

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ASTM
ASTM A447/A447M-11(2021)(Specification)
Standard Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service

ABSTRACT
This specification covers iron-base, heat-resisting alloy castings, intended for structural elements, containers, and supports in electric furnaces, petroleum still tube supports, and for similar applications. The alloys shall be electric-furnace processed and heat treated. The castings shall conform to the required chemical compositions of nickel, chromium, carbon, nitrogen, manganese, silicon, phosphorus, sulfur, and iron. The specimens shall undergo tension test after aging and short-time high-temperature tension test and shall conform to the required values of tensile strength and elongation. A stress-rupture test shall also be performed wherein the specimens shall conform to the required values of tensile stress. The specimen shall also conform to the required values of magnetic permeability.
SCOPE
1.1 This specification covers iron-base, heat-resisting alloy castings of the 25 % chromium, 12 % nickel class, intended for structural elements, containers, and supports in electric furnaces, petroleum still tube supports, and for similar applications up to 2000 °F [1095 °C].  
1.2 In the absence of significant proportions of elements other than those prescribed in Section 5, the two types of alloys covered by this specification may in general be distinguished as follows:  
1.2.1 Type I—Alloys characterized by relatively low limiting creep stress at temperatures between 1500 and 2000 °F [815 and 1095 °C], and relatively high ductility at ordinary temperatures after aging for short periods at temperatures between 1300 and 1500 °F [705 and 815 °C].  
1.2.2 Type II—Alloys having relatively high limiting creep stress but which may develop low ductility at ordinary temperatures when aged for short periods at temperatures between 1350 and 1500 °F [730 and 815 °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.  
1.3.1 Within the text, the SI units are shown in brackets.  
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.

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