ASTM A878/A878M-05

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Designation: A878/A878M – 05
Standard Specification for
Steel Wire, Modified Chromium Vanadium Valve Spring
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Quality
This standard is issued under the fixed designationA878/A878M; 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.
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1. Scope* 2.4 AIAG Standard:
AIAG B-5 02.00 Primary Metals Identification Tag Appli-
1.1 This specification covers the highest quality of round
cation Standard
modified chromium vanadium alloy steel valve spring wire,
uniform in quality and temper, intended for the manufacture of
3. Ordering Information
valve springs and other springs requiring high-fatigue proper-
3.1 Orders for material under this specification shall include
ties when used at moderately elevated temperatures. This wire
the following information for each ordered item:
shall be either in the annealed and cold-drawn or oil-tempered
3.1.1 Quantity (mass),
condition as specified by purchaser.
3.1.2 Name of material (modified chromium vanadium
1.2 The values stated in either SI units or inch-pound units
alloy steel valve spring quality wire),
are to be regarded separately as standard. Within the text, the
3.1.3 Dimensions (Table 1 and Section 8),
inch-pound units are shown in brackets. The values stated in
3.1.4 Condition (Section 6),
each system are not exact equivalents; therefore, each system
3.1.5 Packaging (Section 14),
must be used independent of the other.
3.1.6 Heat analysis report, if requested (5.2),
2. Referenced Documents 3.1.7 Certification or test report, or both, if specified (Sec-
2
tion 13), and
2.1 ASTM Standards:
3.1.8 ASTM designation and year of issue.
A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
NOTE 1—A typical ordering description is as follows: 20 000-kg
A700 PracticesforPackaging,Marking,andLoadingMeth-
oil-tempered modified chromium vanadium alloy steel valve spring
ods for Steel Products for Shipment quality wire, size 6.00 mm in 150-kg coils toASTM ___ dated ___ , or for
inch-pound, 40 000-lb oil-tempered modified chromium vanadium alloy
A751 Test Methods, Practices, andTerminology for Chemi-
steel valve spring quality wire, size 0.250 in. in 350-lb coils toASTM ___
cal Analysis of Steel Products
dated ___ .
E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
4. Materials and Manufacture
E45 Test Methods for Determining the Inclusion Content of
4.1 The steel may be made by any commercially accepted
Steel
steel making process. The steel shall be continuously cast.
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2.2 Federal Standard:
4.2 The finished wire shall be free from detrimental pipe
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
and undue segregation.
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2.3 Military Standard:
MIL-STD-163 Steel Mill Products, Preparation for Ship-
5. Chemical Composition
ment and Storage
5.1 Thesteelshallconformtotherequirementsforchemical
composition specified in Table 2.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
5.2 Heat Analysis—Each heat of steel shall be analyzed by
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
the manufacturer to determine the percentage of elements
A01.03 on Steel Rod and Wire.
prescribed in Table 2. This analysis shall be made from a test
Current edition approved March 1, 2005. Published March 2005. Originally
approved in 1987. Last previous edition approved in 1999 as A878/A878M – 99. specimen preferably taken during the pouring of the heat.
DOI: 10.1520/A0878_A0878M-05.
When requested, this shall be reported to the purchaser and
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
shall conform to the requirements of Table 2.
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.
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Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Available fromAutomotive IndustryAction Group (AIAG), 26200 Lahser Rd.,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098 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, PA19428-2959, United States.
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A878/A878M – 05
A A
TABLE 1 Permissible Variations in Wire Diameter TABLE 3 Tensile Requirements
SI Units SI Units
B
Permissible Permissible Diameter, mm MPa, min MPa, max Min % R.A.
Diameter, mm Variations, Out-of Round,
0.5 2000 2170 b
6mm mm
1.0 1930 2100 b
0.5 to 2.0, incl 0.02 0.02 1.5
...