ASTM A493-23

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: A493 − 16 A493 − 23
Standard Specification for
Stainless Steel Wire and Wire Rods for Cold Heading and
Cold Forging
This standard is issued under the fixed designation A493; 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 cold-finished and hot-finished stainless steel wire and wire rods for cold heading or cold forging for
applications, such as fasteners, where corrosion resistance is a factor.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered 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.
2. Referenced Documents
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A555/A555M Specification for General Requirements for Stainless Steel Wire and Wire Rods
A751 Test Methods and Practices for Chemical Analysis of Steel Products
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),
3.1.2 Size (diameter),
3.1.3 Type or UNS number (see Table 1),
3.1.4 Name (wire or wire rods),
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee A01.17
on Flat-Rolled and Wrought Stainless Steel.
Current edition approved March 1, 2016Nov. 1, 2023. Published March 2016November 2023. Originally approved in 1963. Last previous edition approved in 20132016
as A493 – 09 (2013).A493 – 16. DOI: 10.1520/A0493-16.10.1520/A0493-23.
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
A493 − 23
TABLE 1 Chemical Requirements
A
Grade Composition, %
UNS AISI Carbon Manga- Phos- Sulfur Silicon Chromium Nickel Copper Molyb- Nitrogen Other
Designation Type nese phorus denum Elements
Austenitic Grades
S 17710 . . . 0.15 2.00 0.045 0.030 1.00 17.0–19.0 8.0–10.0 . . . . . . . . . Al
0.90–1.40
S 30200 302 0.15 2.00 0.045 0.030 1.00 17.0–19.0 8.0–10.0 1.00 0.10
S 30400 304 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–10.5 1.00 0.10
S 30403 304L 0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–12.0 1.00 0.10
S 30430 0.10 2.00 0.045 0.030 1.00 17.0–19.0 8.0–10.0 3.0–4.0
S 30433 0.03 2.00 0.045 0.030 1.00 17.0–19.0 8.0–10.0 3.0–4.0
S 30500 305 0.04 2.00 0.045 0.030 1.00 17.0–19.0 10.5–13.0 1.00
S 31600 316 0.08 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00–3.00 0.10
S 31603 316L 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00–3.00 0.10
S 38400 384 0.04 2.00 0.045 0.030 1.00 15.0–17.0 17.0–19.0
Ferritic Grades
S 40940 0.06 1.00 0.045 0.040 1.00 10.5–11.7 0.50 Cb
10XC–0.75
S 42900 429 0.12 1.00 0.040 0.030 1.00 14.0–16.0
S 43000 430 0.04 1.00 0.040 0.030 1.00 16.0–18.0
S 44401 . . . 0.025 1.00 0.040 0.030 . . . 17.5–19.5 1.00 1.75–2.50 0.035 Ti+Cb
0.20+4×
(C+N)−0.80
B B B
S 44625 . . . 0.010 0.40 0.020 0.020 0.40 25.0–27.5 0.50 0.2 0.75–1.50 0.015 Ni+Cu 0.5
B B B
S 44700 . . . 0.010 0.30 0.025 0.020 0.20 28.0–30.0 0.15 0.15 3.5–4.2 0.020 C+N
0.025
B B B
S 44800 . . . 0.010 0.30 0.025 0.020 0.20 28.0–30.0 2.00–2.50 0.15 3.5–4.2 0.020 C+N
0.025
Martensitic Grades
S 41000 410 0.15 1.00 0.040 0.030 1.00 11.5–13.5
S 42010 . . . 0.15–0.30 1.00 0.040 0.030 1.00 13.5–15.0 0.35–0.85 0.40–0.85
S 42030 . . . 0.30 1.00 0.040 0.030 1.00 12.0–14.0 2.00–3.00 1.00–3.00
S 43100 431 0.20 1.00 0.040 0.030 1.00 15.0–17.0 1.25–2.50
S 44004 440C 0.95–1.20 1.00 0.040 0.030 1.00 16.0–18.0 0.75 max
A
Maximum, unless range or minimum is indicated. Where ellipses (. . .) appear in this table, there is no requirement and the element need not be determined or reported.
B
Product analysis tolerance over the maximum limit for carbon and nitrogen to be 0.002 %.
3.1.5 ASTM designation and issue date,
3.1.6 Condition (see 5.2),
3.1.7 Coating (see 5.3),
3.1.8 Coil size (inside and outside diameter),
3.1.9 Special requirements, and
3.1.10 Supplementary requirements.
4. General Requirements for Delivery
4.1 In addition to the requirements of this specification, all requirements of the current editions of Specification A555/A555M
shall apply. Failure to comply with the general requirements of Specification A555/A555M constitutes nonconformance with this
specification.
NOTE 1—A typical ordering description is as follows: 5000 lb (2268 kg) 0.225 in. (5.72 mm) round Type 305 cold heading wire, lightly drafted, copper
coated, 32 in. (813 mm) max OD—22 in. (559 mm) min ID, coils, ASTM Specification A493 – XX. End use: hex head machine bolts.
A493 − 23
5. Manufact
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