ASTM A481-05

Standard Specification for Chromium Metal

ABSTRACT
This specification covers the standard requirements for several grades of chromium metal. Materials shall undergo chemical analysis procedures and shall adhere to specified chemical composition requirements. The metals shall also adhere to standard sizes, tolerances, and friability ratings according their grades.
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-Apr-2005
• 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(2004) - Standard Specification for Chromium Metal
• Effective Date: 01-May-2005
• Replaced By: ASTM A481-05(2010) - Standard Specification for Chromium Metal
• Effective Date: 01-Apr-2010
• Referred By: ASTM A1025/A1025M-10(2020) - Standard Specification for Ferroalloys and Other Alloying Materials, General Requirements
• Effective Date: 01-May-2005
• Referred By: ASTM E363-23 - Standard Test Methods for Chemical Analysis of Chromium and Ferrochromium
• Effective Date: 01-May-2005

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A481 – 05
Standard Specification for
1
Chromium Metal
This standard is issued under the fixed designation A481; 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.
TABLE 1 Chemical Requirements
1. Scope*
Composition, %
1.1 This specification covers several grades of chromium
Element
Grade A Grade B
metal.
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
2.1 ASTM Standards:
A1025 Specification for Ferroalloys and Other Alloying
Materials, General Requirements 5. Size
E11 Specification forWovenWireTest Sieve Cloth andTest
5.1 The various grades are available in sizes as listed in
Sieves
Table 3.
E363 Test Methods for Chemical Analysis of Chromium
5.2 The sizes listed in Table 3 are typical as shipped from
and Ferrochromium
the manufacturer’s plant. These alloys exhibit varying degrees
of friability; therefore, some attrition may be expected in
3. General Conditions for Delivery
transit, storage, and handling. A quantitative test is not avail-
3.1 Materials furnished to this specification shall conform to
able for rating relative friability of ferroalloys. A code system
the requirements of SpecificationA1025, including any supple-
has been developed, therefore, for this purpose, and a number
mentary requirements that are indicated in the purchase order.
rating each product type is shown in the last column of Table
Failure to comply with the general requirements of Specifica-
3. Definitions applicable to these code numbers are given in
tionA1025 constitutes nonconformance with this specification.
Specification A1025.
In case of conflict between the requirements of this specifica-
tion and Specification A1025, this specification shall prevail.
TABLE 2 Supplementary Chemical Requirements
Composition, %
4. Chemical Composition
Element
Grade A Grade B
4.1 The various grades shall conform to the requirements as
Nitrogen, max 0.050 0.020
to chemical composition specified in Tables 1 and 2.
Iron, max 0.35 0.35
4.2 The manufacturer shall furnish an analysis of each
Manganese, max 0.01 0.01
shipment showing the elements specified in Table 1.
Hydrogen, max 0.01 0.003
Oxygen, max 0.50 0.10
4.3 The values shown in Table 2 are expected maximums.
Vanadium, max 0.050 0.050
Upon request of the purchaser, the manufacturer shall furnish
Copper, max 0.01 0.01
an analysis for any of these elements on a cumulative basis
Molybdenum, max 0.050 0.01
Columbium, max 0.050 0.050
over a period mutually agreed upon between the manufacturer
Tantalum, max 0.050 0.003
and the purchaser.
Cobalt, max 0.003 0.001
Aluminum, max 0.30 0.10
Titanium, max 0.050 0.003
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Zirconium, max 0.050 0.003
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
Arsenic, max 0.005 0.003
A01.18 on Castings.
Lead, max 0.003 0.001
Current edition approved May 1, 2005. Published May 2005. Originally
Tin, max 0.001 0.001
approved in 1963. Last previous edition approved in 2004 as A481 – 94 (2004).
Zinc, max 0.00
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