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  • ASTM
    B793-13 Standard Specification for Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and Plastic Injection Molds
    Edition: 2013
    $82.37
    Unlimited Users per year

Description of ASTM-B793 2013

ASTM B793 - 13

Standard Specification for Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and Plastic Injection Molds

Active Standard ASTM B793 | Developed by Subcommittee: B02.04

Book of Standards Volume: 02.04




ASTM B793

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.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

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 .

TABLE 1 Chemical and North American Color Code Requirements A , B

Composition,?%

UNS Z35543
Alloy A
Kirksite A

UNS Z35542
Alloy B
Kirksite B

Color Code C

Green/Red

Green/Black

Element

Aluminum

3.54.5

3.94.3

Cadmium

0.005 max

0.003 max

Copper

2.53.5

2.52.9

Iron

0.100 max

0.075 max

Lead

0.007 max

0.003 max

Magnesium

0.020.10

0.020.05

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 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 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block 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

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

Keywords

blanking dies; casting; casting alloys; forming dies; gravity casting; Kirksite; Kirksite A; Kirksite B; sheet metal dies; zinc;


ICS Code

ICS Number Code 77.120.60 (Lead, zinc, tin and their alloys)


DOI: 10.1520/B0793-13

ASTM International is a member of CrossRef.

ASTM B793

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