Standard Specification for Free-Machining Stainless Steel Bars

ABSTRACT
This specification covers hot-finished or cold-finished bars, except bars for forging, suitable for machining processes. It includes rounds, squares, and hexagons in the more commonly used types of stainless free-machining steels designed especially for optimum machinability and for general corrosion and high-temperature service. Bars may be furnished either hot finished or cold finished in one of the conditions specified. Materials shall adhere to specified chemical composition requirements. At least one hardness testing shall be made midway between surface and center on each lot to determine that the material conforms to hardness requirements. Also, test methods and definition for hardness testing are presented.
SCOPE
1.1 This specification covers hot-finished or cold-finished bars, except bars for forging (Note 1), suitable for machining processes. It includes rounds, squares, and hexagons in the more commonly used types of stainless free-machining steels designed especially for optimum machinability and for general corrosion and high-temperature service. Stainless steel bars other than the free-machining types are covered in a separate specification (Note 2).  
1.2 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standard: within the text and tables, the SI units are shown in [brackets]. 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 specification.Note 1—For bars for reforging, see Specification A314.
Note 2—For non-free machining stainless bars, see Specification A276.

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29-Feb-2012
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ASTM A582/A582M-12e1 - Standard Specification for Free-Machining Stainless Steel Bars
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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´1
Designation: A582/A582M −12
Standard Specification for
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Free-Machining Stainless Steel Bars
This standard is issued under the fixed designationA582/A582M; 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.
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ε NOTE—Section 4.1 was editorially updated in October 2012.
1. Scope* A484/A484M Specification for General Requirements for
Stainless Steel Bars, Billets, and Forgings
1.1 This specification covers hot-finished or cold-finished
A751 Test Methods, Practices, and Terminology for Chemi-
bars, except bars for forging (Note 1), suitable for machining
cal Analysis of Steel Products
processes. It includes rounds, squares, and hexagons in the
A959 Guide for Specifying Harmonized Standard Grade
more commonly used types of stainless free-machining steels
Compositions for Wrought Stainless Steels
designed especially for optimum machinability and for general
E527 Practice for Numbering Metals and Alloys in the
corrosion and high-temperature service. Stainless steel bars
Unified Numbering System (UNS)
other than the free-machining types are covered in a separate
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2.2 SAE Document:
specification (Note 2).
SAE J 1086 Recommended Practice for Numbering Metals
1.2 This specification is expressed in both inch-pound units
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and Alloys
and in SI units; however, unless the purchase order or contract
specifies the applicable M specification designation (SI units),
3. Ordering Information
the inch-pound units shall apply. The values stated in either
3.1 It is the responsibility of the purchaser to specify all
inch-pound units or SI (metric) units are to be regarded
requirements that are necessary for product ordered under this
separately as standard: within the text and tables, the SI units
specification. Such requirements to be considered include, but
are shown in [brackets]. The values stated in each system may
are not limited to, the following:
not be exact equivalents: therefore, each system shall be used
3.1.1 Quantity (weight or number of pieces),
independently of the other. Combining values from the two
3.1.2 Type (alloy) or UNS designation (Table 1),
systems may result in nonconformance with the specification.
3.1.3 Form (bars, angles, etc.),
NOTE 1—For bars for reforging, see Specification A314.
3.1.4 Condition (Table 2),
NOTE 2—For non-free machining stainless bars, see Specification
3.1.5 Finish (5.1),
A276.
3.1.6 Applicable dimensions, including size, thickness,
width, and length,
2. Referenced Documents
3.1.7 Cross section (round, square, etc.),
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2.1 ASTM Standards:
3.1.8 ASTM designation (Specification A582/A582M) and
A276 Specification for Stainless Steel Bars and Shapes
approval date,
A314 Specification for Stainless Steel Billets and Bars for
3.1.9 Preparation for delivery, and
Forging
3.1.10 Marking requirements.
A370 Test Methods and Definitions for Mechanical Testing
NOTE3—Atypicalorderingdescriptionisasfollows:5000lb[2000kg]
of Steel Products
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Type 416 bars, annealed and centerless ground, 1 ⁄2 in. [40 mm] round, 10
to 12 ft [3 to 4 m] in length, ASTM Specification A582/A582Mdated.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
4. General Requirements
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee
4.1 Product furnished to this specification shall conform to
A01.17 on Flat-Rolled and Wrought Stainless Steel.
Current edition approved March 1, 2012. Published March 2012. Originally
the requirements of Specification A484/A484M, including any
approved in 1967. Last previous edition approved in 2005 as A582/A582M – 05.
supplementary requirements indicated in the purchase order or
DOI: 10.1520/A0582_A0582M-12.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from Society of Automotive Engineers (SAE), 400 Commonwealth
the ASTM website. Dr., Warrendale, PA 15096-0001.
*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
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A582/A582M − 12
TABLE 1 Chemical Requirements
Chemical Composition, %
UNS
B Other
Desig- Type
Manga- Phos- Silicon, Molyb- Selenium
C C
A Carbon Sulfur Chromium Nickel Elements
C C
nation
nese phorus, max denum
Austenitic
D
S20300 XM-1 0.08 5.0–6.5 0.04 0.18–0.35 1.00 16.00–18.0
...

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