ASTM B793-08
(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 ASTMTraditional Z35543 Alloy AKirksite A Z35542 Alloy BKirksite B
1.4 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.
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Designation: B793 – 08
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.
TABLE 1 Chemical and North American Color Code
1. Scope*
A,B
Requirements
1.1 This specification covers commercial zinc alloys in
Composition, %
ingot form for remelting for the manufacture of dies and molds
UNS Z35543 UNS Z35542
from the alloys as shown in Table 1.
Alloy A Alloy B
1.2 This specification presents requirements for zinc alloys
Kirksite A Kirksite B
suitable for the production of sand cast or plaster cast forming
C
Color Code Green/Red Green/Black
dies for sheet metal stamping operations and plastic injection
Element
molding. Alloy A is intended for use in the fabrication of dies
Aluminum 3.5–4.5 3.9–4.3
for sheet metal stamping under drop hammer and hydraulic
Cadmium 0.005 max 0.003 max
pressure. Alloy B is a special purpose alloy of closely con-
Copper 2.5–3.5 2.5–2.9
Iron 0.100 max 0.075 max
trolled composition and is primarily used in the manufacture of
Lead 0.007 max 0.003 max
plastic injection molds.
Magnesium 0.02–0.10 0.02–0.05
1.3 This specification covers two zinc alloys which are
Tin 0.005 max 0.001 max
Zinc Remainder Remainder
specified and designated as follows:
A
The following applies to all specified limits in this table: For purposes of
UNS ASTM Traditional
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
Z35543 Alloy A Kirksite A
right hand place of figures used in expressing the specified limit, in accordance
Z35542 Alloy B Kirksite B
with the rounding method of Practice E29.
B
UNS designations were established in accordance with Practice E527.
1.4 This standard does not purport to address all of the
C
Refer to Practice B908. (Note: Colors indicated are for North American
safety concerns, if any, associated with its use. It is the
applications.)
responsibility of the user of this standard to become familiar
with all hazards including those identified in the appropriate
B899 Terminology Relating to Non-ferrous Metals and
Material Safety Data Sheet (MSDS) for this product/material
Alloys
as provided by the manufacturer, to establish appropriate
B908 Practice for the Use of Color Codes for Zinc Casting
safety and health practices, and determine the applicability of
Alloy Ingot
regulatory limitations prior to use.
B949 Specification for General Requirements for Zinc and
Zinc Alloy Products
2. Referenced Documents
E29 Practice for Using Significant Digits in Test Data to
2.1 The following documents of the issue in effect on date
Determine Conformance with Specifications
of order acceptance form a part of this specification to the
E47 Test Methods for Chemical Analysis of Zinc Die-
extent referenced herein: 3
Casting Alloys
2
2.2 ASTM Standards:
E88 Practice for Sampling Nonferrous Metals andAlloys in
B897 Specification for the Configuration of Zinc and Zinc
Cast Form for Determination of Chemical Composition
Alloy Jumbo and Block Ingot
E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)
1 E536 Test Methods for ChemicalAnalysis of Zinc and Zinc
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee Alloys
B02.04 on Zinc and Cadmium.
Current edition approved March 1, 2008. Published April 2008. Originally
3. Terminology
approved in 1988. Last previous edition approved in 2003 as B793 – 03. DOI:
3.1 Terms shall be defined in accordance with Terminology
10.1520/B0793-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or B899.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
3
the ASTM website. Withdrawn.
*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 – 08
4. Ordering Information each ingot selected, and then sampling the liquid composite by
casting suitable specimens for either spectrographic or chemi-
4.1 Orders for ingots under this specification shall include
cal analysis.
the following information:
6.4 Method of Analysis—The determination of chemical
4.1.1 Quantity in pounds,
composition shall
...
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:B793–03 Designation: B 793 – 08
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 B 793; 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 (e) 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 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
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:
B 897 Specification for the Configuration of Zinc and Zinc Alloy Jumbo and Block Ingot
B 899 Terminology Relating to Non-ferrous Metals and Alloys
2
B 908 Practice for the Use of Color Codes for Zinc Casting Alloy Ingot
Practice for the Use of Color Codes for Zinc Casting Alloy Ingot
B 949 Specification for General Requirements for Zinc and Zinc Alloy Products
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
E 47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys
E 88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E 527Practice for Numbering Metals and Alloys (UNS)
Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E 536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
3. Terminology
3.1 Terms shall be defined in accordance with Terminology B 899.
4. Ordering Information
4.1 Orders for ingots under this specification shall include the following information:
1
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.
e1
Current edition approved June 10, 2003. Published August 2003. Originally approved in 1988. Last previous edition approved in 2001 as B793–01 .
Current edition approved March 1, 2008. Published April 2008. Originally approved in 1988. Last previous edition approved in 2003 as B 793 – 03.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 02.04.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn.
*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 ----------------------
B793–08
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
determining conformance with this specification, the observed value or calculated
value obtained from analysis shall be rounded off
...
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