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ASTM A743/A743M-21

(Specification)

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

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

ABSTRACT
This specification covers iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistant application. The grades of these castings represent types of alloy castings suitable for broad ranges of application which are intended for a wide variety of corrosion environments. The steel shall be made by the electric furnace process with or without separate refining such as argon-oxygen decarburization. The castings shall be subjected to heat treatment.
SCOPE
1.1 This specification covers iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistant application. The grades covered by this specification represent types of alloy castings suitable for broad ranges of application which are intended for a wide variety of corrosion environments.  
Note 1: For alloy castings for severe corrosion-resistant service, reference should be made to Specification A744/A744M. For general heat-resistant alloy castings, reference should be made to Specification A297/A297M. For nickel alloy castings for corrosion-resistant service, reference should be made to Specification A494/A494M.  
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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 the specification. Inch-pound units are applicable for material ordered to Specification A743 and SI units for material ordered to Specification A743M.  
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.

General Information

Status
Published
Publication Date
28-Feb-2021
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

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ASTM A743/A743M-21 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General ApplicationASTM A743/A743M-21 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
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REDLINE ASTM A743/A743M-21 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General ApplicationREDLINE ASTM A743/A743M-21 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
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REDLINE ASTM A743/A743M-21 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
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Standards Content (Sample)

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.
Designation: A743/A743M −21
Standard Specification for
Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion
1
Resistant, for General Application
This standard is issued under the fixed designationA743/A743M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* Attack in Austenitic Stainless Steels
A297/A297M Specification for Steel Castings, Iron-
1.1 This specification covers iron-chromium and iron-
Chromium and Iron-Chromium-Nickel, Heat Resistant,
chromium-nickel alloy castings for general corrosion-resistant
for General Application
application. The grades covered by this specification represent
A494/A494M Specification for Castings, Nickel and Nickel
types of alloy castings suitable for broad ranges of application
Alloy
which are intended for a wide variety of corrosion environ-
A744/A744M Specification for Castings, Iron-Chromium-
ments.
Nickel, Corrosion Resistant, for Severe Service
NOTE 1—For alloy castings for severe corrosion-resistant service,
A781/A781M Specification for Castings, Steel and Alloy,
reference should be made to Specification A744/A744M. For general
Common Requirements, for General Industrial Use
heat-resistant alloy castings, reference should be made to Specification
A890/A890M Specification for Castings, Iron-Chromium-
A297/A297M. For nickel alloy castings for corrosion-resistant service,
Nickel-Molybdenum Corrosion-Resistant, Duplex
reference should be made to Specification A494/A494M.
(Austenitic/Ferritic) for General Application
1.2 The values stated in either inch-pound units or SI units
A957/A957M Specification for Investment Castings, Steel
are to be regarded separately as standard. Within the text, the
and Alloy, Common Requirements, for General Industrial
SI units are shown in brackets. The values stated in each
Use
system are not exact equivalents; therefore, each system must
be used independently of the other. Combining values from the
3. General Conditions for Delivery
two systems may result in nonconformance with the specifi-
cation. Inch-pound units are applicable for material ordered to
3.1 Except for investment castings, castings furnished to
Specification A743 and SI units for material ordered to
this specification shall conform to the requirements of Speci-
Specification A743M.
fication A781/A781M, including any supplementary require-
ments that are indicated on the purchase order. Failure to
1.3 This international standard was developed in accor-
dance with internationally recognized principles on standard- comply with the general requirements of Specification A781/
A781M constitutes nonconformance with this specification. In
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- case of conflict between the requirements of this specification
and Specification A781/A781M, this specification shall pre-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. vail.
3.2 Steel investment castings furnished to this specification
2. Referenced Documents
shall conform to the requirements of Specification A957/
2
2.1 ASTM Standards:
A957M, including any supplementary requirements that are
A262 Practices for Detecting Susceptibility to Intergranular
indicated in the purchase order. Failure to comply with the
general requirements of Specification A957/A957M consti-
tutes nonconformance with this specification. In case of con-
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
flict between the requirements of this specification and Speci-
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
fication A957/A957M, Specification A957/A957M shall
A01.18 on Castings.
Current edition approved March 1, 2021. Published March 2021. Originally
prevail.
approved in 1977. Last previous edition approved in 2019 as A743/A743M – 19.
DOI: 10.1520/A0743_A0743M-21.
2 4. Ordering Information
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
4.1 Orders for material to this specification should include
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the following, as required, to describe the material adequately:
*A Summary of Changes section appears at the end of this sta
...

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: A743/A743M − 19 A743/A743M − 21
Standard Specification for
Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion
1
Resistant, for General Application
This standard is issued under the fixed designation A743/A743M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistant application.
The grades covered by this specification represent types of alloy castings suitable for broad ranges of application which are
intended for a wide variety of corrosion environments.
NOTE 1—For alloy castings for severe corrosion-resistant service, reference should be made to Specification A744/A744M. For general heat-resistant alloy
castings, reference should be made to Specification A297/A297M. For nickel alloy castings for corrosion-resistant service, reference should be made to
Specification A494/A494M.
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. 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 the specification.
Inch-pound units are applicable for material ordered to Specification A743 and SI units for material ordered to Specification
A743M.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General
Application
A494/A494M Specification for Castings, Nickel and Nickel Alloy
A744/A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A890/A890M Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/
Ferritic) for General Application
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 March 1, 2019March 1, 2021. Published March 2019March 2021. Originally approved in 1977. Last previous edition approved in 20172019 as
A743/A743M – 17.A743/A743M – 19. DOI: 10.1520/A0743_A0743M-19.10.1520/A0743_A0743M-21.
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 ----------------------
A743/A743M − 21
A957/A957M Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
3. General Conditions for Delivery
3.1 Except for investment castings, castings furnished to this specification shall conform to the requirements of Specification
A781/A781M, including any supplementary requirements that are indicated on the purchase order. Failure to comply with the
general requirements of Specification A781/A781M constitutes nonconformance with this specification. In case of conflict between
the requirements of this specification and Specification A781/A781M, this specification shall prevail.
3.2 Steel investment castings furnished to this specification shall conform to the requirements of Specification A957/A957M,
including any supplementary requirements that are indicated in the purchase order. Failure to comply with the ge
...

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Standard Specification for Steel Castings, Stainless, Precipitation Hardening

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This specification covers iron-chromium-nickel-copper corrosion resistance steel castings capable of being strengthened by precipitation hardening heat treatment. The steel shall be made by electric furnace process with or without separate refining such as argon-oxygen decarburization. The steel materials shall also undergo homogenization heat treatment, solution annealing heat treatment, precipitation hardening and shall conform to the required values of temperature and time and cooling treatment. The materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, copper, columbium, and nitrogen.
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ASTM A757/A757M-22(Specification)
Standard Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing and Other Applications, for Low-Temperature Service

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This specification covers carbon and alloy steel castings for pressure-containing and other applications intended primarily for petroleum and gas pipelines in areas subject to low-ambient temperatures. Castings shall be heat treated by normalizing and tempering or liquid quenching and tempering. The steel shall be made by the electric furnace process or other primary processes. Heat and product analyses shall be performed on the material and the chemical composition shall conform to the prescribed values for carbon, manganese, nickel, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, also for residual elements like vanadium, copper, nickel, chromium, molybdenum, and tungsten. Tensile test shall be made and the mechanical properties thus determined shall conform to the required tensile strength, yield strength, elongation, and reduction of area. Charpy V-notch testing shall be done to determine the impact properties on each heat by specimen type like coupons representing the weld deposits and coupons representing the heat-affected zone. Impact properties shall also be determined on both the heat-affected zone of the base metal and the weld metal of the welding procedure qualification test. After machining, each pressure-containing casting shall undergo hydrostatic pressure testing and shall not leak.
SCOPE
1.1 This specification covers carbon and alloy steel castings for pressure-containing and other applications intended primarily for petroleum and gas pipelines in areas subject to low-ambient temperatures. Castings shall be heat treated by normalizing and tempering or liquid quenching and tempering. All classes are weldable under proper conditions. Hardenability of some grades may limit usable section size.  
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1.2.1 Unless the order specifies an “M” designation, the material shall be furnished to inch-pound units.  
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SCOPE
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ASTM A744/A744M-21a(Specification)
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ABSTRACT
This specification covers standard requirements for iron-chromium-nickel alloy, stainless steel castings intended for particularly severe corrosive applications. Alloys shall be melted by the electric furnace process with or without refining such as argon-oxygen-decarburization. Castings shall be heat treated and shall conform to the required heat treatment conditions. The materials shall conform with the prescribed chemical requirements for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, columbium, copper, selenium, tungsten, vanadium, iron, and nitrogen.
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Standard Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application

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This specification covers standards for iron-chromium and iron-chromium-nickel alloy castings of general purpose grades (Grades HF, HH, HI, HK, HE, HT, HU, HW, HX, HC, HD, HL, HN, and HN) applicable in heat-resistant services. Alloys shall be produced through electric arc, electric-induction, or other approved processes. Heat-treatment shall be conducted when agreed upon by the manufacturer and purchaser. The material shall conform to carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, and molybdenum contents. Tensile requirements including tensile strength, yield point, and elongation shall apply when specified in the purchase order. Guidelines for repair by welding are also given.
SCOPE
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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.
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1.3.1 Within the text, the SI units are shown in brackets.  
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ASTM A356/A356M-21(Specification)
Standard Specification for Steel Castings, Carbon, Low Alloy, and Stainless Steel, Heavy-Walled for Steam Turbines

ABSTRACT
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SCOPE
1.1 This specification covers one grade of martensitic stainless steel and several grades of ferritic steel castings for cylinders (shells), valve chests, throttle valves, and other heavy-walled castings for steam turbine applications.  
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.  
1.2.1 Within the text, the SI units are shown in brackets.  
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 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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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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