ASTM A481-94(2004)

Standard Specification for Chromium Metal

SCOPE
1.1 This specification covers two grades of chromium metal designated as A and B.
1.2 The values stated in inch-pound units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 30-Sep-2004
• ICS: 77.120.40 - Nickel, chromium and their alloys
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

Relations

• Replaces: ASTM A481-94(2000) - Standard Specification for Chromium Metal
• Effective Date: 01-Oct-2004
• Replaced By: ASTM A481-05 - Standard Specification for Chromium Metal
• Effective Date: 01-May-2005
• Referred By: ASTM E363-23 - Standard Test Methods for Chemical Analysis of Chromium and Ferrochromium
• Effective Date: 01-Oct-2004
• Referred By: ASTM A1025/A1025M-10(2020) - Standard Specification for Ferroalloys and Other Alloying Materials, General Requirements
• Effective Date: 01-Oct-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 481 – 94 (Reapproved 2004)
Standard Specification for
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Chromium Metal
This standard is issued under the fixed designation A 481; 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. This specification replaces Federal Specification
QQ-F-145.
A
TABLE 1 Chemical Requirements
1. Scope
Composition, %
1.1 This specification covers two grades of chromium metal
Element
Grade A Grade B
designated as A and B.
1.2 The values stated in inch-pound units are to be regarded Chromium, min 99.0 99.4
Carbon, max 0.050 0.050
as the standard.
Silicon, max 0.15 0.10
Sulfur, max 0.030 0.010
2. Referenced Documents
Phosphorus, max 0.010 0.010
2
A
2.1 ASTM Standards:
For purposes of determining conformance with this specification, the reported
analysisshallberoundedtothenearestunitintheright-handplaceoffiguresused
E 11 Specification for Wire Cloth and Sieves for Testing
in expressing the limiting value, in accordance with the rounding method of
Purposes
Practice E 29.
E 29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
4.2 The manufacturer shall furnish an analysis of each
3
E 31 Methods for Chemical Analysis of Ferroalloys
shipment showing the elements specified in Table 1.
E 32 Practices for Sampling Ferroalloys and SteelAdditives
4.3 The values shown in Table 2 are expected maximums.
for Determination of Chemical Composition
Upon request of the purchaser, the manufacturer shall furnish
E 363 Test Methods for Chemical Analysis of Chromium
an analysis for any of these elements on a cumulative basis
and Ferrochromium
over a period mutually agreed upon between the manufacturer
and the purchaser.
3. Ordering Information
3.1 Orders for material under this specification shall include
A
TABLE 2 Supplementary Chemical Requirements
the following information:
Composition, %
3.1.1 Quantity, Element
Grade A Grade B
3.1.2 Name of material,
Nitrogen, max 0.050 0.020
3.1.3 ASTM designation and year of issue,
Iron, max 0.35 0.35
3.1.4 Size, and
Manganese, max 0.01 0.01
Hydrogen, max 0.01 0.003
3.1.5 Requirements for packaging, analysis reports, etc., as
Oxygen, max 0.50 0.10
appropriate.
Vanadium, max 0.050 0.050
3.2 The customary basis of payments for chromium metal is
Copper, max 0.01 0.01
Molybdenum, max 0.050 0.01
per pound of alloy.
Columbium, max 0.050 0.050
Tantalum, max 0.050 0.003
4. Chemical Composition
Cobalt, max 0.003 0.001
Aluminum, max 0.30 0.10
4.1 The various grades shall conform to the requirements as
Titanium, max 0.050 0.003
to chemical composition specified in Table 1 and Table 2.
Zirconium, max 0.050 0.003
Arsenic, max 0.005 0.003
Lead, max 0.003 0.001
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Tin, max 0.001 0.001
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee Zinc, max 0.005 0.003
Boron, max 0.005 0.003
A01.18 on Castings.
Antimony, max 0.005 0.003
Current edition approved Oct. 1, 2004. Published October 2004. Originally
Silver, max 0.003 0.001
approved in 1963. Last previous edition approved in 2000 as A 481 – 94 (2000).
2
Bismuth, max 0.003 0.001
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
For purposes of determining conformance with this specification, the reported
Standards volume information, refer to the standard’s Document Summary page on
analysisshallberoundedtothenearestunitintheright-handplaceoffiguresused
the ASTM website.
in expressing the limiting value, in accordance with the rounding method of
3
Withdrawn. recommended Practice E 29.
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A 481 – 94 (2004)
5. Size 6. Sampling
5.1 The various grades are available in sizes as listed in 6.1 The material shall be sampled in accordance with
Table 3. Practices E 32.
5.2 The sizes listed in Table 3 are typical as shipped from 6.2 Other methods of sampling mutually agreed upon by the
the manufacturer’s plant. These alloys exhibit varying degrees manufacturer and the purchaser may be used; however, in case
of friability; therefore, some attrition may be expected in of discrepancy, Practices E 32 shall be used for referee.
transit, storage, and handling. A quantitative test is not avail-
7. Chemical Analysis
able for rating relative friability of ferroalloys. A code system
has been develop
...