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Designation: A 473 – 01
Standard Specification for
Stainless Steel Forgings
1
This standard is issued under the fixed designation A 473; 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
1.1 This specification covers austenitic, austenitic-ferritic,
ferritic, and martensitic stainless steel forgings for general use,
and for low- or high-temperature service.
1.2 The values stated in inch-pound units are to be regarded
as the standard.
2. Referenced Documents
2.1 ASTM Standards:
A 314 Specification for Stainless Steel Billets and Bars for
Forging
2
A 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
3
A 484/A 484M Specification for General Requirements for
Stainless Steel Bars, Billets, and Forgings
2
A 751 Test Methods, Practices, and Terminology for
Chemical Analysis of Steel Products
3
E 527 Practice for Numbering Metals and Alloys (UNS)
4
3. Ordering Information
3.1 It is the responsibility of the purchaser to specify all
requirements that are necessary for material ordered under this
specification. Such requirements may include, but are not
limited to, the following:
3.1.1 Quantity (weight or number of pieces),
3.1.2 Dimensions, including prints or sketches,
3.1.3 Name of material (stainless steel forgings),
3.1.4 Type or UNS designation (Table 1),
3.1.5 Condition (Table 2), and
3.1.6 ASTM designation and date of issue.
3.1.7 Test for magnetic permeability if specified by cus-
tomer purchase order when ordering Types 207 and 205.
3.1.8 Special requirements.
3.2 If possible the intended end use of the item should be
given on the purchase order especially when the item is ordered
for a specific end use or uses.
NOTE 1—A typical ordering description is as follows: 5 stainless steel
forgings, Type 410, Designation A, ASTM Specification A 473 dated
———. End use: pump blocks for oil well equipment.
4. General Requirements
4.1 In addition to the requirements of this specification, all
requirements of the current edition of Specification A 484/
A 484M shall apply. Failure to comply with the general
requirements of Specification A 484/A 484M constitutes non-
conformance with this specification.
5. Manufacture
5.1 Material for forgings shall consist of ingots or blooms,
billets, slabs, or bars, either forged or rolled from an ingot, and
cut to the required length by a suitable process. This material,
except for ingots, may be specified to Specification A 314.
5.2 The material shall be forged by hammering, pressing,
rolling, extruding, or upsetting. It shall be brought as nearly as
possible to the finished shape and size by hot-working; and
shall be processed, if practicable, so as to cause metal-flow
during the hot-working operation in the direction most favor-
able for resisting the stresses encountered in service as may be
indicated to the manufacturer by the purchaser.
5.3 When specified on the order, a sample forging may be
sectioned and etched to show flow lines and the condition as
regards internal imperfections. When so specified, the question
of acceptable and unacceptable metal-flow shall be subject to
agreement between the manufacturer and the purchaser prior to
order entry.
5.4 When specified on the order, the manufacturer shall
submit for approval of the purchaser a sketch showing the
shape of the rough forging before machining, or before heat
treating for mechanical properties.
5.5 The grain size shall be as fine as practicable and
precautions shall be taken to minimize grain growth.
6. Heat Treatment
6.1 Except for S31254, the austenitic steels shall receive a
solution heat treatment, consisting of heating the material to a
minimum temperature of 1900°F (1040°C), followed by cool-
ing rapidly in air or water.
6.2 S31254 shall receive a solution heat treatment, consist-
ing of heating the material to a minimum temperature of
2100°F (1150°C) followed by cooling rapidly in air or water.
6.3 When specified, Types 347, 348, and 321 shall receive a
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
A01.17 on Flat Stainless Steel Products.
Current edition approved Mar. 10, 2001. Published April 2001. Originally
published as A 473 – 62 T. Last previous edition A 473 – 99.
2
Annual Book of ASTM Standards, Vol 01.05.
3
Annual Book of ASTM Standards, Vol 01.03.
4
Annual Book of ASTM Standards, Vol 01.01.
1
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
Copyright ASTM International
Provided by IHS under license with ASTM
Not for Resale
No reproduction or networking permitted without license from IHS
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