ASTM B1022-22

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:B1022 −22
Standard Specification for
Zinc-Aluminum-Magnesium Alloys in Ingot Form for Coating
Steel Sheet by the Hot-Dip Process
This standard is issued under the fixed designation B1022; 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 B899 Terminology Relating to Non-ferrous Metals and Al-
loys
1.1 This specification covers commercial zinc-aluminum-
B914 Practice for Color Codes on Zinc and ZincAlloy Ingot
magnesiumalloysiningotformforremeltingforthecoatingof
for Use in Hot-Dip Galvanizing of Steel
steel sheet as specified in Table 1, and referenced in Specifi-
B949 Specification for General Requirements for Zinc and
cations A875/A875M and A1046/A1046M.
Zinc Alloy Products
1.2 The values stated in inch-pound units are to be regarded
E29 Practice for Using Significant Digits in Test Data to
as standard. The values given in parentheses are mathematical
Determine Conformance with Specifications
conversions to SI units that are provided for information only
E527 Practice for Numbering Metals and Alloys in the
and are not considered standard.
Unified Numbering System (UNS)
1.3 This standard does not purport to address all of the
E536 Test Methods for Chemical Analysis of Zinc and Zinc
safety concerns, if any, associated with its use. It is the Alloys
responsibility of the user of this standard to establish appro- 3
2.2 ISO Standards:
priate safety, health, and environmental practices and deter-
ISO 3815–1 Zinc and zinc alloys — Part 1:Analysis of solid
mine the applicability of regulatory limitations prior to use.
samples by optical emission spectrometry
1.4 This international standard was developed in accor-
ISO 3815–2 Zinc and zinc alloys — Part 2: Analysis by
dance with internationally recognized principles on standard-
inductively coupled plasma optical emission spectrometry
ization established in the Decision on Principles for the
2.3 SAE Standards:
Development of International Standards, Guides and Recom-
SAE 1086 Numbering Metals and Alloys
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3. Terminology
2. Referenced Documents
3.1 Terms shall be defined in accordance with Terminology
B899.
2.1 ASTM Standards:
A875/A875M Specification for Steel Sheet, Zinc-5 % Alu-
3.2 See Terminology A902 for definitions of general termi-
minum Alloy-Coated by the Hot-Dip Process
nology relating to metallic-coated hot-dip products.
A902 Terminology Relating to Metallic Coated Steel Prod-
ucts
4. Ordering Information (see Specification B949)
A1046/A1046M Specification for Steel Sheet, Zinc-
4.1 Customers may order an alloy type and specify a target
Aluminum-MagnesiumAlloy-Coated by the Hot-Dip Pro-
level for aluminum or magnesium within the minimum and
cess
maximum for the type listed in Table 1. The acceptable
B897 Specification for Configuration of Zinc and ZincAlloy
composition range that may be specified is listed as the
Jumbo, Block, Half Block, and Slab Ingot
tolerance in Table 1.
5. Materials and Manufacture
This specification is under the jurisdiction of ASTM Committee B02 on
5.1 See Specification B949.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.04 on Zinc and Cadmium.
Current edition approved April 1, 2022. Published April 2022. DOI: 10.1520/
B1022-22.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
Standards volume information, refer to the standard’s Document Summary page on Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale,
the ASTM website. PA 15096, http://www.sae.org.
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B1022−22
TABLE 1 Chemical Composition of Zinc-Aluminum-Magnesium Alloys
Composition, %
E E E D
Common UNS Al Mg Tolerance Additional Cu Fe Pb Cd Sn Zn
B
Name (max) (max) (max) (max) (max) (max)
A, B, C
Type 1 . 5.0 – 13.0 2.0 – 4.0 0.5 1.0 0.10 0.08 0.01 0.007 0.007 Bal
A, B, C
Type 2 . 3.0 – 4.9 2.0 – 4.0 0.3 1.0 0.10 0.08 0.01 0.007 0.007 Bal
A, B, C
Type 3 . 3.0 – 6.0 0.40 – 1.9 0.3 1.0 0.10 0.08 0.01 0.007 0.007 Bal
A, B, C
Type 4 . 0.50 – 2.9 0.40 – 2.5 0.2 1.0 0.10 0.08 0.01 0.007 0.007 Bal
A, B, C
Type 5 . 0.50 – 2.9 2.6 – 4.0 0.2 1.0 0.10 0.08 0.01 0.007 0.007 Bal
A, B, C
Type II . 4.5 – 6.2 0.06 – 0.15 0.3 Al, 0.10 0.08 0.01 0.007 0.007 Bal
0.05 Mg
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 in Section 3 of Practice E29.
B
By agreement between the supplier and the user, one or more additional alloying elements (except iron) may be specified up to a combined total of 1 %.
C
Zn-Al-Mg alloy ingot for hot-dip coatings may contain antimony in amounts of up to 0.002 %. No detrimental effects on alloy performance have ever been noted due to
the presence of this element up to this concentration and, therefore, analyses are not required for this element.
D
For information only. Quantitative determination of this element is not required. Zinc is assumed to be the difference between 100 % and the sum of those elements listed
above (or additional as specified and agreed upon between the supplier and user).
E
The customer may request specific target lev
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