A 232-99 阀簧级铬矾合金钢的标准规范

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A 232-99 阀簧级铬矾合金钢的标准规范1. Scope
1.1 This specification covers the highest quality of round
chromium-vanadium alloy steel valve spring wire， uniform in
quality and temper， intended for the manufacture of valve
springs and other springs requiring high-fatigue properties
when used at moderately elevated temperatures. This wire shall
be either in the annealed and cold-drawn or oil-tempered
condition as specified by the purchaser.
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. Within the text， the
inch-pound units are shown in brackets. The values stated in
each system are not exact equivalents; therefore， each system
must be used independent of the other.
2. Referenced Documents
2.1ASTM Standards:
A 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
2
A 700 Practices for Packaging， Marking， and Loading
Methods for Steel Products for Domestic Shipment3
A 751 Test Methods， Practices， and Terminology for
Chemical Analysis of Steel Products
2
E 29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
4
2.2 ANSI Standard:
B 32.4 Preferred Metric Sizes for Round， Square， Rect-
angle， and Hexagon Metal Products
5
2.3 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
6
2.4 Military Standard:
MIL-STD-163 Steel Mill Products， Preparation for Ship-
ment and Storage6
2.5 AIAG Standard:
AIAG B-5 02.00 Primary Metals Identification Tag Appli-
cation Standard
7
3. Ordering Information
3.1 Orders for material under this specification should
include the following information for each ordered item:
3.1.1 Quantity (mass)，
3.1.2 Name of material (chromium-vanadium alloy steel
valve spring quality wire)，
3.1.3 Dimensions (Table 1 and Section 8)，
3.1.4 Condition (Section 6)，
3.1.5 Packaging (Section 14)，
3.1.6 Heat analysis report， if requested (5.2)，
3.1.7 Certification or test report， or both， if specified (Sec-
tion 13)， and
3.1.8 ASTM designation and year of issue.
NOTE 1-A typical ordering description is as follows: 20 000 kg
oil-tempered chromium-vanadium alloy steel valve spring quality wire，
size 6.00 mm in 150 kg coils to ASTM A 232/A 232M dated ， or for
inch-pound units， 40 000 lb oil-tempered chromium-vanadium alloy steel
valve spring quality wire， size 0.250 in. in 350-lb coils to ASTM
A 232/A 232M dated .
4. Materials and Manufacture
4.1 The steel may be made by any commercially accepted
steel making process. The steel may be either ingot cast or
strand cast.
4.2 The finished wire shall be free from detrimental pipe
and undue segregation.
5. Chemical Composition
5.1 The steel shall conform to the requirements for chemical
composition specified in Table 2.
5.2Heat Analysis-Each heat of steel shall be analyzed by
the manufacturer to determine the percentage of elements
prescribed in Table 2. This analysis shall be made from a test
specimen preferably taken during the pouring of the heat.
When requested， this shall be reported to the purchaser and
shall conform to the requirements of Table 2.
1
This specification is under the jurisdiction of ASTM Committee A-1 on Steel，
Stainless Steel， and Related Alloys and is the direct responsibility of Subcommittee
A1.03 on Steel Rod and Wire.
Current edition approved April 10， 1999. Published June 1999. Originally
published as A 232 – 39 T. Last previous edition A 232/A 232M – 96.
2
Annual Book of ASTM Standards， Vol 01.03.
3
Annual Book of ASTM Standards， Vol 01.05.
4
Annual Book of ASTM Standards， Vol 14.02.
5
Available from the American National Standards Institute， 11 West 42nd Street，
13th Floor， New York， NY 10036.
6
Available from Standardization Documents Order Desk， Bldg. 4 Section D， 700
Robbins Ave.， Philadelphia， PA 19111-5094， Attn: NPODS.
7
Available from the Automotive Industry Action Group， 26200 Lahser， Suite
200， Southfield， MI 48034.