ASTM B860-00

Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing

SCOPE
1.1 This specification covers zinc master alloys which are used in hot dip galvanizing for the purpose of adjusting the concentration of certain alloying elements in the molten zinc bath. Table 1 covers the chemical composition of these materials which include three master alloys of zinc-aluminum (brightener) and one master alloy of zinc-antimony.  ASTMCommonUNSType A-190/10 Zn/Al High PurityZ30750Type A-290/10 Zn/Al Low PurityZ31710Type A-395/5 Zn/Al High PurityZ30503Type A-495/5 Zn/Al Low PurityZ31510Type S-190/10 Zn/SbZ55710
1.2 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 Data Sheet 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.

General Information

• Status: Historical
• Publication Date: 09-May-2002
• ICS: 77.120.60 - Lead, zinc, tin and their alloys
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.04 - Zinc and Cadmium

Relations

• Replaced By: ASTM B860-01 - Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
• Effective Date: 10-May-2002
• Referred By: ASTM B997-16(2021) - Standard Specification for Zinc-Aluminum Alloys in Ingot Form for Hot-Dip Coatings
• Effective Date: 10-May-2002
• Referred By: ASTM B914-21 - Standard Practice for Color Codes on Zinc and Zinc Alloy Ingot for Use in Hot-Dip Galvanizing of Steel
• Effective Date: 10-May-2002
• Referred By: ASTM B949-23 - Standard Specification for General Requirements for Zinc and Zinc Alloy Products
• Effective Date: 10-May-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 860 – 00 An American National Standard
Standard Specification for
Zinc Master Alloys for Use in Hot Dip Galvanizing
This standard is issued under the fixed designation B 860; 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.
TABLE 1 Chemical Requirements Composition, % (Range or
1. Scope *
A
Maximum Value)
1.1 This specification covers zinc master alloys which are
Type A-1 90 % Zinc–10 % Aluminum (90/10 Zn/Al) High Purity
used in hot dip galvanizing for the purpose of adjusting the
Type A-2 90 % Zinc–10 % Aluminum (90/10 Zn/Al) Low Purity
concentration of certain alloying elements in the molten zinc
Type A-3 95 % Zinc–5 % Aluminum (95/5 Zn/Al) High Purity
Type S-1 90 % Zinc–10 % Antimony (90/10 Zn/Sb)
bath. Table 1 covers the chemical composition of these
B
UNS Type A-1 Type A-2 Type A-3 Type S-1
materials which include three master alloys of zinc-aluminum
90/10 Zn/Al 90/10 Zn/Al 95/5 Zn/Al 90/10 Zn/Sb
(brightener) and one master alloy of zinc-antimony.
Z30750 Z31710 Z30503 Z55710
ASTM Common UNS
Fe 0.05 max 0.15 max 0.05 max. 0.03 max
Type A-1 90/10 Zn/Al High Purity Z30750
Pb 0.005 max 0.4 max 0.005 max. 0.015 max
Type A-2 90/10 Zn/Al Low Purity Z31710
Cd 0.004 max . 0.004 max. 0.003 max
Type A-3 95/5 Zn/Al High Purity Z30503
Cu 0.035 max 0.5 max 0.04 max. 0.003 max
Type S-1 90/10 Zn/Sb Z55710
Sn 0.003 max . 0.003 max. 0.01 max
As . . . 0.015 max
1.2 This standard does not purport to address all of the
Al 9.5–10.5 9.5–10.5 4.5–5.5 .
safety concerns, if any, associated with its use. It is the
C
Sb . . . 9.5–10.5
responsibility of the user of this standard to become familiar
Others, Total 0.01 max 0.25 max 0.01 max. 0.03 max
D
Zn Remainder Remainder Remainder Remainder
with all hazards including those identified in the appropriate
A
Material Data Sheet for this product/material as provided by
The following applies to all specified limits in this table: For purposes of
determining conformance with this specification, an observed value obtained from
the manufacturer, to establish appropriate safety and health
analysis shall be rounded off to the nearest unit in the last right-hand place of
practices, and determine the applicability of regulatory limi-
figures used in expressing the limiting value, in accordance with the rounding
tations prior to use. method of Practice E 29.
B
UNS numbers in conformance with Practice E 527.
C
Chemical method under development.
2. Referenced Documents
D
For information only. Quantitative determination of this element is not required.
2.1 The following documents of the issue in effect on date Zinc is assumed to be the difference between 100 % and the sum of those
elements listed above.
of order acceptance form a part of this specification to the
extent referenced herein:
3. Terminology
2.2 ASTM Standards:
3.1 Terms shall be defined in accordance with Terminology
B 899 Terminology Relating to Non-ferrous Metals and
B 899.
Alloys
E 29 Practice for Using Significant Digits in Test Data to
4. Ordering Information
Determine Conformance with Specifications
4.1 Orders for ingots under this specification shall include
E 47 Test Methods for Chemical Analysis of Zinc Die-
the following information:
Casting Alloys
4.1.1 Quantity, lb,
E 88 Practice for Sampling Nonferrous Metals and Alloys
4.1.2 Alloy type (see Table 1),
in Cast Form for Determination of Chemical Composition
4.1.3 Size, if not manufacturer’s standard,
E 527 Practice for Numbering Metals and Alloys (UNS)
4.1.4 Specification number and year date,
E 536 Test Method for Chemical Analysis of Zinc and Zinc
4.1.5 Source inspection (see Section 7), and
Alloys
4.1.6 Marking (see Section 9).
5. Materials and Manufacture
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
5.1 The material covered by this specification shall be of
B02.04 on Zinc and Cadmium.
uniform quality and shall be free from harmful contamination.
Current edition approved Oct. 10, 2000. Published November 2000. Originally
The ingot surface shall contain a minimum of dross and
published as B 860-95 . Last previous edition B 860-95.
Annual Book of ASTM Standards, Vol 02.04.
adhering foreign matter.
Annual Book of ASTM Standards, Vol 14.02.
Annual Book of ASTM Standards, Vol 03.05.
6. Chemical Requirements
Annual Book of ASTM Standards, Vol 01.01
Annual Book of ASTM Standards, Vol 03.06. 6.1 Limits—The alloys shall conform to the requirements as
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 860
to chemical composition prescribed in Table 1. Conformance 7. Source Inspection
shall be determined by the producer by analyzing samples
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