ASTM B750-07

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B 750 – 07
Standard Specification for
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GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot
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Form for Hot-Dip Coatings
This standard is issued under the fixed designation B 750; 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.
TABLE 1 GALFAN, Zn-5Al-MM Alloy Ingot Chemical
1. Scope*
A,B,C,D,E
Requirements
1.1 This specification covers GALFAN, zinc-5 %
UNS Z38510
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Element
aluminum-mischmetal (Zn-5Al-MM) alloy (UNS Z38510) in
Composition,%
ingot form for remelting for use in the production of hot-dip
F
Aluminum 4.2–6.2
coatings on steel. Alloy composition is specified in Table 1.
Cerium + lanthanum, total 0.03–0.10
1.2 The values stated in inch-pound units are to be regarded Iron, max 0.075
Silicon, max 0.015
as the standard. The values stated in parentheses are for
G
Lead , max 0.005
information only. G
Cadmium , max 0.005
G
Tin , max 0.002
1.3 This standard does not purport to address all of the
H
Others , each, max 0.02
safety concerns, if any, associated with its use. It is the
H
Others , total, max 0.04
responsibility of the user of this standard to become familiar
Zinc Remainder
with all hazards including those identified in the appropriate
A
For purposes of acceptance and rejection, the observed value or calculated
Material Safety Data Sheet (MSDS) for this product/material value obtained from analysis should be rounded to the nearest unit in the last
right-hand place of figures, used in expressing the specified limit, in accordance
as provided by the manufacturer, to establish appropriate
with the rounding procedure prescribed in Section 3 of Practice E29.
B
safety and health practices, and determine the applicability of
By agreement between purchaser and supplier, analysis may be required and
regulatory limitations prior to use. limits established for elements or compounds not specified in the table of chemical
composition.
C
GALFAN, Zn-5Al-MM alloy ingot for hot-dip coatings may contain antimony,
2. Referenced Documents
copper, and magnesium in amounts of up to 0.002, 0.1, and 0.05 %, respectively.
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2.1 ASTM Standards: No harmful effects have ever been noted due to the presence of these elements
up to these concentrations and, therefore, analyses are not required for these
B 899 Terminology Relating to Non-ferrous Metals and
elements.
D
Alloys
Magnesium may be specified by the buyer up to 0.1 % maximum.
E
E29 Practice for Using Significant Digits in Test Data to Zirconium and titanium may each be specified by the buyer up to 0.02 %
maximum.
Determine Conformance with Specifications
F
Aluminum may be specified by the buyer up to 12 % maximum.
G
E47 Test Methods for Chemical Analysis of Zinc Die-
Lead and cadmium, and to a lesser extent tin and antimony, are known to
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cause intergranular corrosion in zinc-aluminum alloys. For this reason it is
Casting Alloys
important to maintain the levels of these elements below the limits specified.
E88 Practice for Sampling Nonferrous Metals and Alloys
H
Except antimony, copper, magnesium, zirconium, and titanium.
in Cast Form for Determination of Chemical Composition
E 527 Practice for Numbering Metals and Alloys (UNS)
GF-1 Standard Practice for Determination of Cerium and
E 1277 Test Method for Chemical Analysis of Zinc-5 %
Aluminum-MischmetalAlloysbyICPEmissionSpectrom- Lanthanum Compositions in GALFAN Alloy (5 %
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-0.04 % La-0.04 % Ce-Bal SHG Zn)
etry
2.2 Other Standard:
3. Terminology
3.1 Terms shall be defined in accordance with Terminology
1
GALFAN is a registered trademark of the GALFAN Information Center, Inc.
B 899.
2
This specification is under the jurisdiction of ASTM Committee B02 on
3.2 Definitions of Terms Specific to This Standard:
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
3.2.1 mischmetal, n—a naturally occurring mixture of rare-
B02.04 on Zinc and Cadmium.
Current edition approved May 1, 2007. Published May 2007. Originally earth elements in metallic form, primarily cerium and lantha-
approved in 1985. Last previous edition approved in 2003 as B 750 – 03.
num.
3
UNS number in conformance with Practice E 527.
4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available from International Lead Zinc Research Organization, 2525 Meridian
the ASTM website. Parkway, P.O. Box 12036, Research Triangle Park, NC 27709 – 2036, http://
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Withdrawn. www.ilzro.org.
*A Summary of Changes section appears at the end of this standard.
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