ASTM B997-16(2021)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B997 −16 (Reapproved 2021)
Standard Specification for
Zinc-Aluminum Alloys in Ingot Form for Hot-Dip Coatings
This standard is issued under the fixed designation B997; 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 2.2 ASTM Standards:
B750 Specification for GALFAN (Zinc-5 % Aluminum-
1.1 Thisspecificationcoverscertainzinc-aluminum(Zn-Al)
,
Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings
alloys in ingot form for re-melting for use in the production of
B860 Specification for Zinc Master Alloys for Use in Hot
hot-dip coatings on steel. Alloy compositions are specified
Dip Galvanizing
below and in Table 1.
B899 Terminology Relating to Non-ferrous Metals and Al-
ASTM Common UNS
loys
Type 5 95/5 Zn/Al Z30507
B949 Specification for General Requirements for Zinc and
Type 10 90/10 Zn/Al Z30600
Type 15 85/15 Zn/Al Z30706
Zinc Alloy Products
E29 Practice for Using Significant Digits in Test Data to
NOTE 1—The zinc-aluminum alloys in Specification B997 are intended
tobeusedprimarilytocreateamoltenzinc-aluminumbathanddifferfrom Determine Conformance with Specifications
the master alloys in Specification B860 which are intended primarily to
E527 Practice for Numbering Metals and Alloys in the
adjust the concentration of certain elements in molten zinc galvanizing
Unified Numbering System (UNS)
baths.
E536 Test Methods for Chemical Analysis of Zinc and Zinc
1.2 The values stated in inch-pound units are to be regarded
Alloys
as standard. The values given in parentheses are mathematical
E1277 Test Method for Analysis of Zinc-5 % Aluminum-
conversions to SI units that are provided for information only
Mischmetal Alloys by ICP Emission Spectrometry
and are not considered standard.
2.3 ISO Standards:
1.3 This standard does not purport to address all of the
ISO 3815-1 Zinc and zinc alloys — Part 1:Analysis of solid
safety concerns, if any, associated with its use. It is the
samples by optical emission spectrometry
responsibility of the user of this standard to establish appro-
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by
priate safety, health, and environmental practices and deter-
inductively coupled plasma optical emission spectrometry
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Terminology:
ization established in the Decision on Principles for the
3.1.1 Type 5, n—95 % zinc – 5 % aluminum alloy.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 3.1.2 Type 10, n—90 % zinc – 10 % aluminum alloy.
Barriers to Trade (TBT) Committee.
3.1.3 Type 15, n—85 % zinc – 15 % aluminum alloy.
3.2 Abbreviations:
2. Referenced Documents
3.2.1 95/5 Zn/Al—95 % zinc – 5 % aluminum alloy.
2.1 The following documents of the issue in effect on date
3.2.2 90/10 Zn/Al—90 % zinc – 10 % aluminum alloy.
of order acceptance form a part of this specification to the
extent referenced herein: 3.2.3 85/15 Zn/Al—85 % zinc – 15 % aluminum alloy.
1 2
This specification is under the jurisdiction of ASTM Committee B02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
B02.04 on Zinc and Cadmium. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Nov. 1, 2021. Published December 2021. Originally the ASTM website.
ɛ1 3
approved in 2015. Last previous edition approved in 2016 as B997 – 16 . DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/B0997-16R21. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B997 − 16 (2021)
A,B,C,D,E,F,G
TABLE 1 Zn-Al Alloy Ingot Chemical Requirements
7.2.1 Approved methods include: Test Methods E536,
Composition, %
E1277, ISO 3815-1, or ISO 3815-2.
F E E
Type 5 Type 10 Type 15
Element
NOTE 2—Test Method E1277 is directly applicable up to 8 %Al, in an
95/5 Zn/Al 90/10 Zn/Al 85/15 Zn/Al
UNS Z30507 UNS Z30600 UNS Z30706
unmodified form. ISO 3815-1 and ISO 3815-2 are generic methods
Aluminum 4.2-6.2 9.5-10.5 14.1-15.9 applied to zinc and zinc alloys. Each of the methods may be modified and
Iron, max 0.075 0.075 0.075
formatted for the alloy to be assayed. An experienced chemist, using
Silicon, max 0.015 0.015 0.015
suitable and/or traceable standards along with valid quality assurance
H
Lead, max 0.005 0.005 0.005
techniques, will be able to perform and validate the methods and
H
Cadmium, max 0.005 0.005 0.005
demonstrate acceptable precision and accuracy.
H
Tin, max 0.002 0.002 0.002
I
Others, each, max 0.02 0.02 0.02
I 8. Materials and Manufacture
Others, total, max 0.04 0.04 0.04
Zinc Remainder Remainder Remainder
8.1 The alloys may be made by any approve
...