ASTM B952/B952M-19(2024)

Standard Specification for Zinc Alloys in Ingot Form for Spin Casting

ABSTRACT
This specification covers four zinc alloys in ingot form, namely: Spin Casting Alloy SC-A, Spin Casting Alloy SC-B, Spin Casting Alloy SC-C, and ZA-73, for remelting for the manufacture of spin castings. The alloys may be made by any approved process, shall be of uniform quality, and shall be free from dross or other harmful contamination. The ingots shall conform to the chemical composition limits prescribed for aluminum, magnesium, copper, iron, lead, cadmium, tin, nickel, and zinc. Chemical analysis requirements for determination and for verification (if needed) of chemical composition are detailed.
SCOPE
1.1 This specification covers zinc alloys in ingot form for remelting for the manufacture of Spin Castings as specified and designated, as shown in Table 1. Seven alloy compositions are specified, designated as follows:
Common  
Traditional  
UNS  
Spin Casting Alloy SC-A  
...  
Z35550  
Spin Casting Alloy SC-B  
...  
Z35551  
Spin Casting Alloy SC-C  
...  
Z35534  
Spin Casting Alloy SC-D  
HJ10  
Z35547  
Spin Casting Alloy SC-E  
HJ20  
Z35548  
Spin Casting Alloy SC-F  
HJ40  
Z35552  
ZA-73  
...  
Z36500  
1.2 Zinc alloys #2, #3, #5, and ZA-8 specified in Specification B240 are also used in the spin casting process.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
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 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.  
1.5 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

• Status: Published
• Publication Date: 31-Mar-2024
• ICS: 77.150.60 - Lead, zinc and tin products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.04 - Zinc and Cadmium

Relations

• Replaces: ASTM B952/B952M-19 - Standard Specification for Zinc Alloys in Ingot Form for Spin Casting
• Effective Date: 01-Apr-2024

Overview

The ASTM B952/B952M-19(2024) Standard Specification for Zinc Alloys in Ingot Form for Spin Casting defines material and quality requirements for zinc alloys used to produce spin castings. Developed by ASTM International, this standard provides essential guidelines for seven alloy types-Spin Casting Alloys SC-A, SC-B, SC-C, SC-D, SC-E, SC-F, and ZA-73-supplied in ingot form and intended for remelting. By ensuring strict chemical composition and traceability, the standard supports consistency, safety, and optimal performance in spin casting operations across multiple industries.

Key Topics

• Alloy Coverage: Specifies requirements for seven zinc alloy compositions used in spin casting, including their chemical composition and unique color code identifications.
• Material Quality: Mandates that ingots be uniform in quality, free from dross, and without harmful contaminants, supporting reliable spin casting outcomes.
• Chemical Composition: Details composition limits for key elements such as aluminum, magnesium, copper, iron, lead, cadmium, tin, nickel, and zinc, ensuring alloy conformity for industrial use.
• Testing and Verification: Prescribes analytical methods such as ASTM E536, ISO 3815-1, and ISO 3815-2 for determining chemical composition, allowing for both determination and verification.
• Order and Packaging Requirements: Outlines required documentation, packaging specifications, and product marking guidelines to ensure proper identification and traceability.
• Safety and Compliance: Highlights user responsibility regarding safety, health, and environmental standards, urging compliance with Safety Data Sheets (SDS) and regulatory requirements.

Applications

The ASTM B952/B952M-19(2024) standard is critical for industries relying on high-quality zinc alloys for spin casting, such as:

• Automotive and Transportation: For producing gears, bushings, and decorative parts requiring precise detail and durability.
• Consumer Goods: Common in manufacturing hardware, jewelry, promotional items, and toys that benefit from effortless casting and intricate shapes.
• Prototyping and Model Making: Ideal for creating detailed prototypes and short-run production components with rubber, polymer, or silicon molds.
• Electrical and Electronics: Used for efficient casting of housings, connectors, and specialty components.
• Industrial and Mechanical Components: Enables production of specialized parts with tight tolerances and repeatable properties through centrifugal casting techniques.

By defining stringent quality and material specifications, this standard helps producers and users of zinc alloy ingots ensure consistent performance, compliance, and end-product reliability in demanding production environments.

Related Standards

For comprehensive zinc alloy casting practices and industry consistency, the following ASTM and ISO standards are referenced or commonly used alongside ASTM B952/B952M-19(2024):

• ASTM B240 – Specification for Zinc and Zinc-Aluminum (ZA) Alloys in Ingot Form for Foundry and Die Castings
• ASTM B899 – Terminology Relating to Non-Ferrous Metals and Alloys
• ASTM B908 – Practice for the Use of Color Codes for Zinc Casting Alloy Ingot
• ASTM B949 – General Requirements for Zinc and Zinc Alloy Products
• ASTM E29 – Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ASTM E536 – Test Methods for Chemical Analysis of Zinc and Zinc Alloys
• ISO 3815-1 and ISO 3815-2 – Zinc and Zinc Alloys – Analysis of Solid Samples

These related standards ensure that zinc alloy materials used in spin casting processes meet international best practices, providing reliable guidance for global manufacturers, foundries, and contract casters seeking quality assurance and compliance.

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: B952/B952M − 19 (Reapproved 2024)
Standard Specification for
Zinc Alloys in Ingot Form for Spin Casting
This standard is issued under the fixed designation B952/B952M; 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
2.1 The following documents of the issue in effect on date
1.1 This specification covers zinc alloys in ingot form for
of order acceptance form a part of this specification to the
remelting for the manufacture of Spin Castings as specified and
extent referenced herein:
designated, as shown in Table 1. Seven alloy compositions are
specified, designated as follows: 2.2 ASTM Standards:
B240 Specification for Zinc and Zinc-Aluminum (ZA) Al-
Common Traditional UNS
loys in Ingot Form for Foundry and Die Castings
Spin Casting Alloy SC-A . Z35550
B899 Terminology Relating to Non-ferrous Metals and Al-
Spin Casting Alloy SC-B . Z35551
loys
Spin Casting Alloy SC-C . Z35534
Spin Casting Alloy SC-D HJ10 Z35547
B908 Practice for the Use of Color Codes for Zinc Casting
Spin Casting Alloy SC-E HJ20 Z35548
Alloy Ingot
Spin Casting Alloy SC-F HJ40 Z35552
B949 Specification for General Requirements for Zinc and
ZA-73 . Z36500
Zinc Alloy Products
1.2 Zinc alloys #2, #3, #5, and ZA-8 specified in Specifi-
E29 Practice for Using Significant Digits in Test Data to
cation B240 are also used in the spin casting process.
Determine Conformance with Specifications
E536 Test Methods for Chemical Analysis of Zinc and Zinc
1.3 The values stated in either SI units or inch-pound units
Alloys
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
2.3 ISO Standards:
system shall be used independently of the other. Combining
ISO 3815-1 Zinc and zinc alloys—Part 1: Analysis of solid
values from the two systems may result in non-conformance
samples by optical emission spectrometry
with the standard. ISO 3815-2 Zinc and zinc alloys—Part 2: Analysis by in-
ductively coupled plasma optical emission
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
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
by the manufacturer, to establish appropriate safety, health,
3.2 Definitions of Terms Specific to This Standard:
and environmental practices, and determine the applicability
3.2.1 spin casting, n—a casting process in which molten
of regulatory limitations prior to use. metal is poured into a rubber, polymer, graphite, or metal mold
and spun centrifugally until solidified, also a product produced
1.5 This international standard was developed in accor-
by such a process.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4. Ordering Information
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4.1 Orders for zinc alloy ingot under this specification shall
Barriers to Trade (TBT) Committee.
include information as specified in Specification B949.
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 [e-mail]. 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, 2024. Published April 2024. Originally the ASTM website.
approved in 2007. Last previous edition approved in 2019 as B952/B952M – 19. Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
DOI: 10.1520/B0952_B0952M-19R24. 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
B952/B952M − 19 (2024)
TABLE 1 Chemical and Nort
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