ASTM A581/A581M-95b(2000)
(Specification)Standard Specification for Free-Machining Stainless Steel Wire and Wire Rods
Standard Specification for Free-Machining Stainless Steel Wire and Wire Rods
SCOPE
1.1 This specification covers cold-finished wire and hot-finished wire rods in coils. Wire rods are a semi-finished product primarily for the manufacture of wire. Wire includes rounds, squares, hexagons and special shapes in the more commonly used types of stainless free-machining steels designed especially for optimum machinability and for general corrosion and high temperature service.
Note 1--For wire other than those of the free-machining types, see Specification A580/A580M.
1.2 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standards: within the text and tables, 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.
1.3 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.
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Designation: A 581/A581M – 95b (Reapproved 2000)
Standard Specification for
Free-Machining Stainless Steel Wire and Wire Rods
This standard is issued under the fixed designation A 581/A581M; 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 3. Ordering Information
1.1 This specification covers cold-finished wire and hot- 3.1 It is the responsibility of the purchaser to specify all
finished wire rods in coils. Wire rods are a semi-finished requirements that are necessary for material ordered under this
product primarily for the manufacture of wire. Wire includes specification. Such requirements may include, but are not
rounds, squares, hexagons and special shapes in the more limited to, the following:
commonly used types of stainless free-machining steels de- 3.1.1 Quantity (weight),
signed especially for optimum machinability and for general 3.1.2 Name of material (stainless steel),
corrosion and high temperature service. 3.1.3 Condition (see Section 5),
3.1.4 Finish (see Section 7),
NOTE 1—For wire other than those of the free-machining types, see
3.1.5 Applicable dimensions including size, thickness,
Specification A 580/A 580M.
width, and length or coil diameter (inside, or outside diameter),
1.2 The values stated in either inch-pound units or SI
and coil weights,
(metric) units are to be regarded separately as standards: within
3.1.6 Cross section (round, square, etc.),
the text and tables, the SI units are shown in [brackets]. The
3.1.7 Type or UNS designation (Table 1),
values stated in each system are not exact equivalents; there-
3.1.8 ASTM designation (Specification A 581/A 581M) and
fore, each system must be used independently of the other.
date of issue, and
Combining values from the two systems may result in noncon-
3.1.9 Exceptions to the specification or special require-
formance with the specification.
ments.
1.3 Unless the order specifies the applicable “M” specifica-
NOTE 2—A typical ordering description is as follows: 5000 lb [2000 kg]
tion designation, the material shall be furnished to the inch-
stainless steel wire, annealed, ⁄4in. [6.5 mm] round, coils, Type 303,
pound units.
ASTM Specification A 581/A 581M dated . End use: machined valve
parts.
2. Referenced Documents
2.1 ASTM Standards:
4. Chemical Composition
A 555/A555M Specification for General Requirements for
4.1 The steel shall conform to the requirements as to
Stainless Steel Wire and Wire Rods
chemical composition specified in Table 1.
A 580/A580M Specification for Stainless Steel Wire
4.2 Methods and practices relating to chemical analysis
A 751 Test Methods, Practices, and Terminology for
required by this specification shall be in accordance with Test
Chemical Analysis of Steel Products
Methods, Practices, and Terminology A 751.
E 527 Practice for Numbering Metals and Alloys (UNS)
2.2 SAE Standard:
5. Condition
J 1086 Practice for Numbering Metals and Alloys (UNS)
5.1 Cold-finished wire may be furnished in one of the
conditions listed in Table 2.
5.2 Wire rods may be furnished in the as-hot-rolled or
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
as-hot-rolled and annealed condition.
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.17 on Flat Stainless Steel Products.
Current edition approved Sept. 10, 1995. Published November 1995. Originally 6. Mechanical Requirements
published as A 581 – 67. Last previous edition A 581 – 95a.
6.1 Wire products shall conform to the mechanical test
Annual Book of ASTM Standards, Vol 01.03.
requirements specified in Table 3.
Annual Book of ASTM Standards, Vol 01.01.
Available from Society of Automotive Engineers, 400 Commonwealth Drive,
Warrendale, PA 15096.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 581/A581M – 95b (2000)
TABLE 1 Chemical Requirements
Composition, %
UNS
Phos-
Desig- Type
Carbon, Manga- Silicon,
B
A
phorus, Sulfur Chromium Nickel Other Elements
nation B
max nese max
max
AUSTENITIC
S20300 XM-1 0.08 5.0–6.5 0.04 0.18–0.35 1.00 16.0–18.0 5.0–6.5 Cu 1.75–2.25
S30300 303 0.15 2.00 0.20 0.15 min 1.00 17.0–19.0 8.0–10.0 . . .
0.20
S30310 XM-5 0.15 2.5–4.5 0.20 0.25 min 1.00 17.0–19.0 7.0–10.0 . . .
...
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