ASTM B750-12
(Specification)Standard Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings
Standard Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings
ABSTRACT
This specification covers GALFAN, zinc-aluminum-mischmetal (Zn-5Al-MM) alloy (UNS Z38510) in ingot form for remelting for use in the production of hot-dip coatings on steel. The alloys may be made by any approved process and shall be free from dross, slag, or other harmful contamination. The alloys shall conform to the requirements as to chemical composition prescribed for aluminum, cerium and lanthanum, iron, silicon, lead, cadmium, tin, zinc, and other elements. Sampling for chemical analysis of the alloy in standard ingot form shall be done either by drilling, sawing, or melting, and shall meet the requirements specified for selection of portion, sample preparation, and size of sample and storage. Determination of the chemical composition shall be performed by ICP argon plasma spectrometric or other methods. X-ray fluorescence spectrometry may be used for determination of cerium and lanthanum.
SCOPE
1.1 This specification covers GALFAN, zinc-5 % aluminum-mischmetal (Zn-5Al-MM) alloy (UNS Z38510) in ingot form for remelting for use in the production of hot-dip coatings on steel. Alloy composition is specified in Table 1.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
TABLE 1 GALFAN, Zn-5Al-MM Alloy Ingot Chemical
RequirementsA,B,C,D,E ElementUNS Z38510
Composition,% AluminumF4.2–6.2 Cerium + lanthanum, total 0.03–0.10 Iron, max 0.075 Silicon, max0.015 LeadG, max 0.005 CadmiumG, max 0.005 TinG, max 0.002 OthersH, each, max 0.02 OthersH, total, max 0.04 Zinc Remainder
A For purposes of acceptance and rejection, the observed value or calculated 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 with the rounding procedure prescribed in Section 3 of Practice E29.
B By agreement between purchaser and supplier, analysis may be required and 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, copper, and magnesium in amounts of up to 0.002, 0.1, and 0.05 %, respectively. 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 elements.
D Magnesium may be specified by the buyer up to 0.1 % maximum.
E Zirconium and titanium may each be specified by the buyer up to 0.02 % maximum.
F Aluminum may be specified by the buyer up to 12 % maximum.
G Lead and cadmium, and to a lesser extent tin and antimony, are known to cause intergranular corrosion in zinc-aluminum alloys. For this reason it is important to maintain the levels of these elements below the limits specified.
H Except antimony, copper, magnesium, zirconium, and titanium.
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Designation:B750 −12
StandardSpecification for
1
GALFAN (Zinc-5% Aluminum-Mischmetal) Alloy in Ingot
2
Form for Hot-Dip Coatings
This standard is issued under the fixed designation B750; 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.
1. Scope* E1277 Test Method for Chemical Analysis of Zinc-5 %
Aluminum-Mischmetal Alloys by ICP Emission Spec-
1.1 This specification covers GALFAN, zinc-5 %
3 trometry
aluminum-mischmetal (Zn-5Al-MM) alloy (UNS Z38510) in
5
2.2 Other Standard:
ingot form for remelting for use in the production of hot-dip
GF-1 Standard Practice for Determination of Cerium and
coatings on steel. Alloy composition is specified in Table 1.
Lanthanum Compositions in GALFAN Alloy (5 %
1.2 The values stated in inch-pound units are to be regarded
-0.04 % La-0.04 % Ce-Bal SHG Zn)
6
as standard. The values given in parentheses are mathematical
2.3 ISO Standards:
conversions to SI units that are provided for information only
ISO 3815-1 Zinc and zinc alloys — Part 1:Analysis of solid
and are not considered standard.
samples by optical emission spectrometry
1.3 This standard does not purport to address all of the
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by
safety concerns, if any, associated with its use. It is the inductively coupled plasma optical emission spectrometry
responsibility of the user of this standard to become familiar
3. Terminology
with all hazards including those identified in the appropriate
Material Safety Data Sheet (MSDS) for this product/material 3.1 Terms shall be defined in accordance with Terminology
B899.
as provided by the manufacturer, to establish appropriate
safety and health practices, and determine the applicability of
3.2 Definitions of Terms Specific to This Standard:
regulatory limitations prior to use.
3.2.1 mischmetal, n—a naturally occurring mixture of rare-
earth elements in metallic form, primarily cerium and lantha-
2. Referenced Documents
num.
4
2.1 ASTM Standards:
3.3 Abbreviations:
B899 Terminology Relating to Non-ferrous Metals and Al-
3.3.1 MM—mischmetal.
loys
3.3.2 Zn-5Al-MM—zinc-5 % aluminum mischmetal.
B949 Specification for General Requirements for Zinc and
Zinc Alloy Products 4. Ordering Information
E29 Practice for Using Significant Digits in Test Data to
4.1 Orders for ingot under this specification shall include
Determine Conformance with Specifications
the relevant information as listed in Specification B949,
E88 Practice for Sampling Nonferrous Metals andAlloys in
Section 4.
Cast Form for Determination of Chemical Composition
5. Materials and Manufacture
E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)
5.1 The alloys may be made by any approved process.
5.2 The material covered by this specification shall be free
from dross, slag, or other harmful contamination.
1
GALFAN is a registered trademark of the GALFAN Information Center, Inc.
2
This specification is under the jurisdiction of ASTM Committee B02 on
6. Chemical Composition
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.04 on Zinc and Cadmium.
6.1 Limits—The alloys shall conform to the requirements as
Current edition approved May 1, 2012. Published May 2012. Originally
to chemical composition prescribed in Table 1. Conformance
approved in 1985. Last previous edition approved in 2009 as B750 – 09. DOI:
10.1520/B0750-12.
3 5
UNS number in conformance with Practice E527. Available from International Lead Zinc Research Organization, 2525 Meridian
4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Parkway, P.O. Box 12036, Research Triangle Park, NC 27709 – 2036, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.ilzro.org.
6
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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B750−12
TABLE 1 GALFAN, Zn-5Al-MM Alloy Ingot Chemical
plasma spectrometric (Test Method E1277) or other methods
A,B,C,D,E
Requirements
(including spectrochemical methods ISO 3815-1 or ISO
UNS Z38510
3815-2. In case of dispute, the results secured by Test Method
Element
Composition,%
E1277 shall be the basis of acceptance.
F
Aluminum 4.2–6.2
Cerium + lanthanum, total 0.03–0.10
8.2 Astandard
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B750–09 Designation: B750 – 12
Standard Specification for
1
GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot
2
Form for Hot-Dip Coatings
This standard is issued under the fixed designation B750; 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.
1. Scope*
3
1.1 This specification covers GALFAN, zinc-5 % aluminum-mischmetal (Zn-5Al-MM) alloy (UNS Z38510) in ingot form for
remelting for use in the production of hot-dip coatings on steel. Alloy composition is specified in Table 1.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data
Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and
determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
4
2.1 ASTM Standards:
B899 Terminology Relating to Non-ferrous Metals and Alloys
B949 Specification for General Requirements for Zinc and Zinc Alloy Products
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications E88
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E1277 Test Method for Chemical Analysis of Zinc-5 % Aluminum-Mischmetal Alloys by ICP Emission Spectrometry
5
2.2 Other Standard:
GF-1 StandardPracticeforDeterminationofCeriumandLanthanumCompositionsinGALFANAlloy(5 %-0.04 %La-0.04 %
Ce-Bal SHG Zn)
6
2.3 ISO Standards:
ISO 3815-1 Zinc and zinc alloys — Part 1: Analysis of solid samples by optical emission spectrometry
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by inductively coupled plasma optical emission spectrometry
3. Terminology
3.1 Terms shall be defined in accordance with Terminology B899.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 mischmetal, n—a naturally occurring mixture of rare-earth elements in metallic form, primarily cerium and lanthanum.
3.3 Abbreviations:
3.3.1 MM—mischmetal.
3.3.2 Zn-5Al-MM—zinc-5 % aluminum mischmetal.
4. Ordering Information
4.1Orders for ingot under this specification shall include the following information:
1
GALFAN is a registered trademark of the GALFAN Information Center, Inc.
2
This specification is under the jurisdiction ofASTM Committee B02 on Nonferrous Metals andAlloys and is the direct responsibility of Subcommittee B02.04 on Zinc
and Cadmium.
Current edition approved Oct.May 1, 2009.2012. Published November 2009.May 2012. Originally approved in 1985. Last previous edition approved in 20082009 as
B750 – 089. DOI: 10.1520/B0750-09.10.1520/B0750-12.
3
UNS number in conformance with Practice E527.
4
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
5
Available from International Lead Zinc Research Organization, 2525 Meridian Parkway, P.O. Box 12036, Research Triangle Park, NC 27709 – 2036, http://
www.ilzro.org.
6
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
B750 – 12
TABLE 1 GALFAN, Zn-5Al-MM Alloy Ingot Chemical
A,B,C,D,E
Requirements
UNS Z38510
Element
Composition,%
F
Aluminum 4.2–6.2
Cerium + lanthanum, total 0.03–0.10
Iron, max 0.075
Silicon, max 0.015
G
Lead , max 0.005
G
Cadmium , max 0.005
G
Tin , max 0.002
H
Others , each, max 0.02
H
Others , total, max 0.04
Zinc Remainder
A
For purposes of acceptance and rejection, the observed value or calculated
value obtained from analysis shou
...
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