ASTM A679/A679M-06(2012)

Standard Specification for Steel Wire, High Tensile Strength, Cold Drawn

ABSTRACT
This specification covers round, uncoated, high tensile strength, cold-drawn steel spring wires having properties and quality suitable for the manufacture of mechanical springs and wire forms subject to high static stresses or infrequent dynamic load, or both. The steel shall be made by any commercially accepted steel making process. The steel shall either be ingot cast or continuous strand cast. The finished wire shall be free from detrimental pipe and undue segregation. The wire shall be cold drawn to produce the desired tensile strength. The wire finish shall be suitable for forming or coiling. It is not intended that this material be furnished with a metallic coating. Heat and product analysis shall be conducted wherein the material shall conform to the required chemical composition values of carbon, manganese, phosphorus, sulfur, and silicon. The material shall undergo tensile and wrap tests. The steel shall have fine pearlite microstructure and the wire surface shall not exhibit imperfections.
SCOPE
1.1 This specification covers round, uncoated, high tensile strength, cold-drawn steel spring wire, having properties and quality suitable for the manufacture of mechanical springs and wire forms subject to high static stresses or infrequent dynamic load, or both.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.

General Information

• Status: Historical
• Publication Date: 29-Feb-2012
• ICS: 77.140.65 - Steel wire, wire ropes and link chains
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.03 - Steel Rod and Wire

Relations

• Replaces: ASTM A679/A679M-06 - Standard Specification for Steel Wire, High Tensile Strength, Cold Drawn
• Effective Date: 01-Mar-2012
• Replaced By: ASTM A679/A679M-17 - Standard Specification for Steel Wire, High Tensile Strength, Cold Drawn
• Effective Date: 01-Sep-2017

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:A679/A679M −06 (Reapproved 2012)
Standard Specification for
Steel Wire, High Tensile Strength, Cold Drawn
This standard is issued under the fixed designationA679/A679M; 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.
1. Scope* 2.3 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
1.1 This specification covers round, uncoated, high tensile
2.4 AIAG Standard:
strength, cold-drawn steel spring wire, having properties and
AIAGB-5 02.00 Primary Metals Identification Tag Applica-
quality suitable for the manufacture of mechanical springs and
tion Standard
wireformssubjecttohighstaticstressesorinfrequentdynamic
load, or both.
3. Terminology
1.2 The values stated in either SI units or inch-pound units
3.1 Definitions—For definitions of terms used in this
are to be regarded separately as standard. The values stated in
specification, refer to Terminology A941.
each system are not exact equivalents; therefore, each system
must be used independently of the other.
4. Ordering Information
2. Referenced Documents 4.1 It shall be the responsibility of the purchaser to specify
2 all requirements that are necessary for material under this
2.1 ASTM Standards:
specification. Such requirements may include, but are not
A370 Test Methods and Definitions for Mechanical Testing
limited to, the following:
of Steel Products
4.1.1 Quantity (mass),
A510 Specification for General Requirements forWire Rods
4.1.2 Name of material (steel wire, high tensile strength,
and Coarse Round Wire, Carbon Steel
hard drawn),
A510M Specification for General Requirements for Wire
4.1.3 Dimensions (Table 1 and Section 9),
Rods and Coarse Round Wire, Carbon Steel (Metric)
3 4.1.4 Packaging (Section 15),
(Withdrawn 2011)
4.1.5 Heat analysis report, if requested (6.2),
A700 Guide for Packaging, Marking, and Loading Methods
4.1.6 Certification or test report, or both, if specified (Sec-
for Steel Products for Shipment
tion 14), and
A751 Test Methods, Practices, and Terminology for Chemi-
4.1.7 ASTM designation and year of issue.
cal Analysis of Steel Products
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
NOTE 1—A typical ordering description is as follows: 20 Mg high
tensile strength, hard-drawn steel mechanical spring wire, 5.00-mm
Alloys, and Ferroalloys
diameter, 500-kg coils to ASTM A679/A679M dated ____ , or for
E29 Practice for Using Significant Digits in Test Data to
inch-pound units, 40 000-lb high tensile strength, hard-drawn steel me-
Determine Conformance with Specifications
chanical spring wire, 0.192-in. diameter, in 1000-lb coils to ASTM
2.2 ANSI Standard:
A679/A679M dated ____ .
B32.4 Preferred Metric Sizes for Round, Square, Rectangle,
5. Materials and Manufacture
and Hexagon Metal Products
5.1 The steel may be made by any commercially accepted
steel making process. The steel may be either ingot cast or
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
continuous strand cast. The rod to be used in the manufacture
A01.03 on Steel Rod and Wire.
of wire furnished to this specification shall be in accordance
Current edition approved March 1, 2012. Published March 2012. Originally
with Specifications A510 or A510M.
approved in 1973. Last previous edition approved in 2006 as A679/A679M – 06.
DOI: 10.1520/A0679_A0679M-06R12.
5.2 The finished wire shall be free from detrimental pipe
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and undue segregation.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 5
The last approved version of this historical standard is referenced on Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
www.astm.org. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
4 6
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., Available fromAutomotive IndustryAction Group (AIAG), 26200 Lahser Rd.,
4th Floor, New York, NY 10036. Suite 200, Southfield, MI 48034.
*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
A679/A679M−06 (2012)
TABLE 1 Tensile Requirements
6.4 For referee purposes, Test Methods, Practices, and
SI Units Inch-Pound Units Terminology A751 shall be used.
Tensile Strength, MPa Tensile Strength, ksi
Diameter,
Diameter, in.
A,B
mm
7. Mechanical Properties
min max min max
7.1 Tension Test:
0.50 2400 2650 0.020 350 387
7.1.1 Requirements—The material as represented by tension
0.55 2380 2620 0.023 343 380
0.60 2350 2600 0.026 337 373
test specimens shall conform to the requirements prescribed in
0.65 2320 2580 0.029 331 366
Table 1.
0.70 2300 2550 0.032 327 361
7.1.2 Number of Tests—Onetestspecimenshallbetakenfor
0.80 2250 2500 0.035 322 356
0.90 2200 2450 0.041 314 347
each 10 coils or fraction thereof, in a lot. Each heat in a given
1.00 2150 2400 0.048 306 339
lot shall be tested.
1.10 2120 2380 0.054 300 331
7.1.3 Test Method—The tension test shall be made in
1.20 2100 2350 0.062 293 324
1.40 2050 2300 0.072 287 317
accordance with Test Methods and Definitions A370.
1.60 2000 2250 0.080 282 312
7.2 Wrap Test:
1.80 1980 2220 0.092 275 304
2.00 1950 2200 0.106 268 296
7.2.1 Requirements—The material as represented by the
2.20 1900 2150 0.120 263 290
wrap test specimens shall conform to the requirements speci-
2.50 1850 2100 0.135 258 285
2.80 1820 2050 0.148 253 279 fied in Table 3.
3.00 1800 2000 0.162 249 275
7.2.2 Number of Tests—Onetestspecimenshallbetakenfor
3.50 1750 1950 0.177 245 270
each 10 coils, or fraction thereof, in a lot. Each heat in a given
4.00 1700 1900 0.1927 241 267
4.50 1680 1880 0.207 238 264 lot shall be tested.
5.00 1650 1850
7.2.3 Location of Test—Test specimens shall be taken from
A
Tensile strength values for intermediate diameters shall be interpolated.
either end of the coil.
B
Preferred sizes. For a complete list, refer to ANSI B32.4
7.2.4 Test Method—The wrap test shall be made in accor-
dance with Test Methods and Definitions A370.
8. Metallurgical Requirements
5.3 The wire shall be cold drawn to produce the desired
8.1 Microstructure—The wire shall be cold drawn with a
mechanical properties.
fine pearlite structure.
5.4 The wire finish shall be suitable for forming or coiling.
8.2 Surface Conditions—The wire surface shall not exhibit
It is not intended that this material be furnished with a metallic
imperfections that exceed 3.5 % of the wire diameter or 0.25
coating.
mm (0.010 in.) in depth, whichever is smaller.
6. Chemical Composition
9. Dimensions and Permissible Variations
6.1 Thesteelshallconformtotherequirementsf
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