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ASTM A743/A743M-03

(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

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 A 744/A 744M. For general heat-resistant alloy castings, reference should be made to Specification A 297/A 297M. For nickel alloy castings for corrosion-resistant service, reference should be made to Specification A 494/A 494M.
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 A 743 and SI units for material ordered to Specification A 743M.

General Information

Status
Historical
Publication Date
09-May-2003
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 A743/A743M-98ae1 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
Effective Date
10-May-2003
Replaced By
ASTM A743/A743M-06 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
Effective Date
01-Mar-2006
Referred By
ASTM A744/A744M-21a - Standard Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
Effective Date
10-May-2003
Referred By
ASTM F841-19 - Standard Specification for Thrusters, Tunnel, Permanently Installed in Marine Vessels
Effective Date
10-May-2003
Referred By
ASTM A403/A403M-22b - Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
Effective Date
10-May-2003
Referred By
ASTM F998-12(2022) - Standard Specification for Centrifugal Pump, Shipboard Use
Effective Date
10-May-2003
Referred By
ASTM F1548-01(2023) - Standard Specification for Performance of Fittings for Use with Gasketed Mechanical Couplings Used in Piping Applications
Effective Date
10-May-2003
Referred By
ASTM F1718-01(2019) - Standard Specification for Rotary Positive Displacement Distillate Fuel Pumps
Effective Date
10-May-2003
Referred By
ASTM F1510-21 - Standard Specification for Rotary Positive Displacement Pumps, Ships Use
Effective Date
10-May-2003
Referred By
ASTM F1476-07(2019) - Standard Specification for Performance of Gasketed Mechanical Couplings for Use in Piping Applications
Effective Date
10-May-2003
Referred By
ASTM A990/A990M-21 - Standard Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure-Retaining Parts for Corrosive Service
Effective Date
10-May-2003
Referred By
ASTM A957/A957M-21 - Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
Effective Date
10-May-2003
Referred By
ASTM A781/A781M-21 - Standard Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
Effective Date
10-May-2003
Referred By
ASTM A488/A488M-18e2 - Standard Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
Effective Date
10-May-2003

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ASTM A743/A743M-03 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General ApplicationASTM A743/A743M-03 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
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ASTM A743/A743M-03 - Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
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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: A 743/A 743M – 03
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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope * A 447/A447M Specification for Steel Castings, Chromium-
Nickel-Iron Alloy (25-12 Class), for High-Temperature
1.1 This specification covers iron-chromium and iron-
3
Service
chromium-nickel alloy castings for general corrosion-resistant
A 494/A494M Specification for Castings, Nickel and
application. The grades covered by this specification represent
3
Nickel Alloy
types of alloy castings suitable for broad ranges of application
A 744/A744M Specification for Castings, Iron-Chromium-
which are intended for a wide variety of corrosion environ-
3
Nickel, Corrosion Resistant, for Severe Service
ments.
A 781/A781M Specification for Castings, Steel and Alloy,
NOTE 1—For alloy castings for severe corrosion-resistant service, 3
Common Requirements, for General Industrial Use
reference should be made to Specification A 744/A 744M. For general
heat-resistant alloy castings, reference should be made to Specification
3. General Conditions for Delivery
A 297/A 297M. For nickel alloy castings for corrosion-resistant service,
3.1 Material furnished to this specification shall conform to
reference should be made to Specification A 494/A 494M.
the requirements of Specification A 781/A 781M, including
1.2 The values stated in either inch-pound units or SI units
any supplementary requirements that are indicated on the
are to be regarded separately as standard. Within the text, the
purchase order. Failure to comply with the general require-
SI units are shown in brackets. The values stated in each
ments of Specification A 781/A 781M constitutes nonconfor-
system are not exact equivalents; therefore, each system must
mance with this specification. In case of conflict between the
be used independently of the other. Combining values from the
requirements of this specification and Specification A 781/
two systems may result in nonconformance with the specifi-
A 781M, this specification shall prevail.
cation. Inch-pound units are applicable for material ordered to
Specification A 743 and SI units for material ordered to
4. Ordering Information
Specification A 743M.
4.1 Orders for material to this specification should include
the following, as required, to describe the material adequately:
2. Referenced Documents
4.1.1 Description of the casting by pattern number or
2.1 ASTM Standards:
drawing,
A 262 Practices for Detecting Susceptibility to Intergranu-
4.1.2 Grade,
2
lar Attack in Austenitic Stainless Steels
4.1.3 Heat treatment,
A 297/A297M Specification for Steel Castings, Iron-
4.1.4 Options in the specification, and
Chromium and Iron-Chromium-Nickel, Heat-Resistant,
4.1.5 Supplementary requirements desired, including the
3
for General Application
standards of acceptance.
A 370 Test Methods and Definitions for MechanicalTesting
2
of Steel Products
5. Process
5.1 The steel shall be made by the electric furnace process
1 with or without separate refining such as argon-oxygen decar-
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee burization (AOD).
A01.18 on Castings.
Current edition approved May 10, 2003. Published May 2003. Originally
6. Heat Treatment
approved in 1977. Last previous edition approved in 1998 asA 743/A 743M – 98a.
2
6.1 Castings shall be heat treated in accordance with the
Annual Book of ASTM Standards, Vol 01.03.
3
Annual Book of ASTM Standards, Vol 01.02. requirements in 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 ----------------------
A 743/A 743M – 03
TABLE 1 Heat Treatment Requirements
Grade Heat Treatment
CF8, CG3M, CG8M, CG12, CF20, Heat to 1900°F [1040°C] minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid
CF8M, CF8C,CF16F, CF16Fa cool by other means.
CH10, CH20, CE30, CK20 Heat to 2000°F [1093°C] minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid
cool by other means.
CA15, CA15M, CA40, CA40F (1) Heat to 1750°F [955°C] minimum, air cool and temper at 1100°F [595°C] minimum, or
(2) Anneal at 1450°F [790°C]
...

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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.
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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.
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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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SCOPE
1.1 This specification covers creep-strength enhanced alloy steel castings for valves, flanges, fittings, and other pressure-containing parts intended primarily for high-temperature service (see Note 1). However, they are not restricted to such applications and the castings may be used for other applications for which the attributes of the material, as defined by this specification, are suitable.  
1.2 One grade of martensitic alloy steel, Grade C91 (UNS Number J84090), is covered (see Note 2). It is provided in two classes, differentiated by the type of heat treatment after welding. This and similar steels are characterized by a predominantly tempered martensitic or tempered Bainitic microstructure that is stabilized by the precipitation of temper-resistant particles at various precipitate nucleation sites in the microstructure. Such steels are designed to have creep-rupture strengths significantly superior to those of alloys of nominally similar compositions, but in which the precipitates or nucleation sites are absent. Since this crucial difference cannot be revealed by room-temperature mechanical property tests, these alloys require tighter controls on manufacturing and processing.
Note 1: The grades covered by this specification represent materials that are generally suitable for assembly with other castings or wrought steel parts by fusion welding. It is not intended to imply that these grades possess equal degrees of weldability; therefore, it is the responsibility of the purchaser to establish a suitable welding technique. Since these grades possess varying degrees of suitability for high-temperature service, it is also the responsibility of the purchaser to determine which grade shall be furnished, due consideration being given to the requirements of the applicable construction codes.
Note 2: The committee formulating this specification has included one grade of material that is considered to represent a type of ferritic alloy steel suitable for valves, flanges, fittings, and other pressure-containing parts. Additional alloy steels will be considered for inclusion in this specification by the committee as the need becomes apparent.  
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.

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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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