ASTM B793-15
(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. (A) The following applies to all specified limits in this table: For purposes of determining conformance with this specification, the observed value or calculated value obtained from analysis shall be rounded off “to the nearest unit” in the last right hand place of figures used in expressing the specified limit, in accordance with the rounding method of Practice E29.(B) UNS designations were established in accordance with Practice E527.(C) Refer to Practice B908. (Note: Colors indicated are for North American applications.)
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 and health practices, and determine the applicability of regulatory limitations prior to use.
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Designation: B793 −15
StandardSpecification for
Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and
1
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.
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1. Scope* 2.2 ASTM Standards:
B897 Specification for Configuration of Zinc and ZincAlloy
1.1 This specification covers commercial zinc alloys in
Jumbo, Block, Half Block, and Slab Ingot
ingot form for remelting for the manufacture of dies and molds
B899 Terminology Relating to Non-ferrous Metals and Al-
from the alloys as shown in Table 1.
loys
1.2 This specification presents requirements for zinc alloys
B908 Practice for the Use of Color Codes for Zinc Casting
suitable for the production of sand cast or plaster cast forming
Alloy Ingot
dies for sheet metal stamping operations and plastic injection
B949 Specification for General Requirements for Zinc and
molding. Alloy A is intended for use in the fabrication of dies
Zinc Alloy Products
for sheet metal stamping under drop hammer and hydraulic
E29 Practice for Using Significant Digits in Test Data to
pressure. Alloy B is a special purpose alloy of closely con-
Determine Conformance with Specifications
trolled composition and is primarily used in the manufacture of
E88 Practice for Sampling Nonferrous Metals and Alloys in
plastic injection molds.
Cast Form for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the
1.3 This specification covers two zinc alloys which are
specified and designated as follows: Unified Numbering System (UNS)
E536 Test Methods for Chemical Analysis of Zinc and Zinc
UNS ASTM Traditional
Z35543 Alloy A Kirksite A
Alloys
Z35542 Alloy B Kirksite B
3
2.3 ISO Standards:
1.4 The values stated in inch-pound units are to be regarded
ISO 3815-1 Zinc and zinc alloys—Part 1: Analysis of solid
as standard. The values given in parentheses are mathematical
samples by optical emission spectrometry
conversions to SI units that are provided for information only
ISO 3815-2 Zinc and zinc alloys—Part 2: Analysis by in-
and are not considered standard.
ductively coupled plasma optical emission spectrometry
1.5 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to become familiar
3.1 Terms shall be defined in accordance with Terminology
with all hazards including those identified in the appropriate
B899.
Safety Data Sheet (SDS) for this product/material as provided
3.2 Definitions of Terms Specific to This Standard:
by the manufacturer, to establish appropriate safety and health
3.2.1 Kirksite, n—a common trade name for aluminum-
practices, and determine the applicability of regulatory limi-
copper-magnesium alloys, Kirksite A and Kirksite B, used to
tations prior to use.
produce, among other things, sheet metal forming dies.
3.2.2 plastic injection molds, n—molds used for the produc-
2. Referenced Documents
tion of plastic parts by pressure injection of molten or
2.1 The following documents of the issue in effect on date
semi-molten plastic.
of order acceptance form a part of this specification to the
3.2.3 sheet metal forming die, n—a die or pattern used to
extent referenced herein:
form sheet metal into a finished or semi-finished shape using
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
CurrenteditionapprovedJune1,2015.PublishedJuly2015.Originallyapproved the ASTM website.
3
in 1988. Last previous edition approved in 2013 as B793 – 13. DOI: 10.1520/ Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
B0793-15. 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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B793 − 15
TABLE 1 Chemical and North American Color Code
6.2 Chemical requirement procedures shall be in compli-
A,B
Requirements
ance with the provisions of Specification B949, Section 5.2.
Composition, %
7. Sampling for Chemical Analysis
UNS Z35543 UNS Z35542
Alloy A Alloy B
7.1 Sampling procedures
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: B793 − 13 B793 − 15
Standard Specification for
Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and
1
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*
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 Material Safety Data
Sheet (MSDS)(SDS) 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
2.1 The following documents of the issue in effect on date of order acceptance form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo, Block, Half Block, and Slab Ingot
B899 Terminology Relating to Non-ferrous Metals and Alloys
B908 Practice for the Use of Color Codes for Zinc Casting Alloy Ingot
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 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)
E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
3
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
1
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zinc
and Cadmium.
Current edition approved Feb. 1, 2013June 1, 2015. Published March 2013July 2015. Originally approved in 1988. Last previous edition approved in 20122013 as
B793 – 12.B793 – 13. DOI: 10.1520/B0793-13.10.1520/B0793-15.
2
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 Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
3
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 ----------------------
B793 − 15
TABLE 1 Chemical and North American Color Code
A,B
Requirements
Composition, %
UNS Z35543 UNS Z35542
Alloy A Alloy B
Kirksite A Kirksite B
C
Color Code Green/Red Green/Black
Element
Aluminum 3.5–4.5 3.9–4.3
Cadmium 0.005 max 0.003 max
Copper 2.5–3.5 2.5–2.9
Iron 0.100 max 0.075 max
Lead 0.007 max 0.003 max
Magnesium 0.02–0.10 0.02–0.05
Tin 0.005 max 0.001 max
Zinc Remainder Remainder
A
The following applies to all specified limits in this table: For purposes of
determ
...
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