ASTM B793-16(2021)
(Specification)Standard Specification for Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and Plastic Injection Molds
Standard Specification for Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and Plastic Injection Molds
ABSTRACT
This specification covers the standard requirements for commercial zinc casting alloys in ingot form for use in the manufacture of sheet metal forming dies, sand cast or plaster cast forming dies, and plastic injection molds. Kirksite A alloy (UNS Z35543) is intended for use in the fabrication of dies for sheet metal stamping under drop hammer and hydraulic pressure while Kirksite B alloy (UNS Z35542) is a special purpose alloy of closely controlled composition and is primarily used in the manufacture of plastic injection molds. The alloys may be made by any approved process and shall be of uniform quality and free from dross, slag, or other harmful contamination. Jumbo or block ingots shall conform to the configuration, or to a shape and size previously agreed upon. Conformance with the composition requirements for aluminum, cadmium, copper, iron, lead, magnesium, tin and zinc shall be determined by spectrographic or chemical analysis. The samples for chemical analysis shall be taken from the material by drilling, sawing, milling, turning, or clipping a representative piece or pieces of the ingot.
SCOPE
1.1 This specification covers commercial zinc alloys in ingot form for remelting for the manufacture of dies and molds from the alloys as shown in Table 1.
1.2 This specification presents requirements for zinc alloys suitable for the production of sand cast or plaster cast forming dies for sheet metal stamping operations and plastic injection molding. Alloy A is intended for use in the fabrication of dies for sheet metal stamping under drop hammer and hydraulic pressure. Alloy B is a special purpose alloy of closely controlled composition and is primarily used in the manufacture of plastic injection molds.
1.3 This specification covers two zinc alloys which are specified and designated as follows:
UNS
ASTM
Traditional
Z35543
Alloy A
Kirksite A
Z35542
Alloy B
Kirksite B
1.4 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.
1.5 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.
1.6 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.
General Information
Relations
Standards Content (Sample)
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: B793 −16 (Reapproved 2021)
Standard Specification for
Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and
Plastic Injection Molds
This standard is issued under the fixed designation B793; 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. Referenced Documents
1.1 This specification covers commercial zinc alloys in 2.1 The following documents of the issue in effect on date
ingot form for remelting for the manufacture of dies and molds of order acceptance form a part of this specification to the
from the alloys as shown in Table 1. extent referenced herein:
1.2 This specification presents requirements for zinc alloys 2.2 ASTM Standards:
suitable for the production of sand cast or plaster cast forming B897 Specification for Configuration of Zinc and ZincAlloy
dies for sheet metal stamping operations and plastic injection Jumbo, Block, Half Block, and Slab Ingot
molding. Alloy A is intended for use in the fabrication of dies B899 Terminology Relating to Non-ferrous Metals and Al-
for sheet metal stamping under drop hammer and hydraulic loys
pressure. Alloy B is a special purpose alloy of closely con- B908 Practice for the Use of Color Codes for Zinc Casting
trolled composition and is primarily used in the manufacture of Alloy Ingot
plastic injection molds. B949 Specification for General Requirements for Zinc and
Zinc Alloy Products
1.3 This specification covers two zinc alloys which are
E29 Practice for Using Significant Digits in Test Data to
specified and designated as follows:
Determine Conformance with Specifications
UNS ASTM Traditional
E88 Practice for Sampling Nonferrous Metals and Alloys in
Z35543 Alloy A Kirksite A
Z35542 Alloy B Kirksite B Cast Form for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the
1.4 The values stated in inch-pound units are to be regarded
Unified Numbering System (UNS)
as standard. The values given in parentheses are mathematical
E536 Test Methods for Chemical Analysis of Zinc and Zinc
conversions to SI units that are provided for information only
Alloys
and are not considered standard.
2.3 ISO Standards:
1.5 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 become familiar
ISO 3815-2 Zinc and zinc alloys—Part 2: Analysis by in-
with all hazards including those identified in the appropriate
ductively coupled plasma optical emission spectrometry
Safety Data Sheet (SDS) for this product/material as provided
by the manufacturer, to establish appropriate safety, health,
3. Terminology
and environmental practices, and determine the applicability
of regulatory limitations prior to use.
3.1 Terms shall be defined in accordance with Terminology
1.6 This international standard was developed in accor-
B899.
dance with internationally recognized principles on standard-
3.2 Definitions of Terms Specific to This Standard:
ization established in the Decision on Principles for the
3.2.1 Kirksite, n—a common trade name for aluminum-
Development of International Standards, Guides and Recom-
copper-magnesium alloys, Kirksite A and Kirksite B, used to
mendations issued by the World Trade Organization Technical
produce, among other things, sheet metal forming dies.
Barriers to Trade (TBT) Committee.
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 April 1, 2021. Published April 2021. Originally the ASTM website.
approved in 1988. Last previous edition approved in 2016 as B793 – 16. DOI: Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/B0793-16R21. 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
B793 − 16 (2021)
TABLE 1 Chemical and North American Color Code
or ISO 3815-2 or other methods. In case of dispute, the results
A,B
Requirements
secured by Test Methods E536, or ISO 3815-1, or ISO 3815-2
Composition, %
shall be the
...
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