ASTM B860-02

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

• Replaces: ASTM B860-01E1 - Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
• Effective Date: 10-May-2002
• Replaced By: ASTM B860-05 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B 860 – 02
Standard Specification for
1
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/ High Purity
used in hot dip galvanizing for the purpose of adjusting the
Al)
concentration of certain alloying elements in the molten zinc
Type A-2 90 % Zinc–10 % Aluminum (90/10 Zn/ Low Purity
Al)
bath. Table 1 covers the chemical composition of these
Type A-3 95 % Zinc–5 % Aluminum (95/5 Zn/Al) High Purity
materials which include four master alloys of zinc-aluminum
Type A-4 95 % Zinc–5 % Aluminum (95/5 Zn/Al) Low Purity
(brightener) and one master alloy of zinc-antimony. Type S-1 90 % Zinc–10 % Antimony (90/10 Zn/
Sb)
ASTM Common UNS
B
Type A-1 90/10 Zn/Al High Purity Z30750
UNS Type A-1 Type A-2 Type A-3 Type A-4 Type S-1
Type A-2 90/10 Zn/Al Low Purity Z31710 90/10 Zn/Al 90/10 Zn/Al 95/5 Zn/Al 95/5 Zn/Al 90/10 Zn/Sb
Type A-3 95/5 Zn/Al High Purity Z30503
Z30750 Z31710 Z30503 Z31510 Z55710
Type A-4 95/5 Zn/Al Low Purity Z31510
Fe 0.05 max 0.15 max 0.05 max 0.15 max 0.03 max
Type S-1 90/10 Zn/Sb Z55710
Pb 0.005 max 0.4 max 0.005 max 0.4 max 0.015 max
Cd 0.004 max . 0.004 max . 0.003 max
1.2 This standard does not purport to address all of the
Cu 0.035 max 0.5 max 0.035 max 0.5 max 0.003 max
safety concerns, if any, associated with its use. It is the
Sn 0.003 max . 0.003 max . 0.01 max
As . . . . 0.015 max
responsibility of the user of this standard to become familiar
Al 9.5–10.5 9.5–10.5 4.5–5.5 4.5–5.5 .
with all hazards including those identified in the appropriate
C
Sb . . . . 9.5–10.5
Material Safety Data Sheet (MSDS) for this product/material
Others, Total 0.01 max 0.25 max 0.01 max 0.25 max 0.03 max
D
Zn Remainder Remainder Remainder Remainder Remainder
as provided by the manufacturer, to establish appropriate
A
safety and health practices, and determine the applicability of The following applies to all specified limits in this table: For purposes of
determining conformance with this specification, an observed value obtained from
regulatory limitations prior to use.
analysis shall be rounded off to the nearest unit in the last right-hand place of
figures used in expressing the limiting value, in accordance with the rounding
2. Referenced Documents
method of Practice E29.
B
UNS numbers in conformance with Practice E 527.
2.1 The following documents of the issue in effect on date
C
Chemical method under development.
D
of order acceptance form a part of this specification to the
For information only. Quantitative determination of this element is not required.
Zinc is assumed to be the difference between 100 % and the sum of those
extent referenced herein:
elements listed above.
2.2 ASTM Standards:
B 899 Terminology Relating to Non-ferrous Metals and
2
6
Alloys
E 527 Practice for Numbering Metals and Alloys (UNS)
E29 Practice for Using Significant Digits in Test Data to
E 536 Test Method for ChemicalAnalysis of Zinc and Zinc
3
5
Determine Conformance with Specifications
Alloys
E47 Test Methods for Chemical Analysis of Zinc Die-
4
3. Terminology
Casting Alloys
E88 Practice for Sampling Nonferrous Metals and Alloys
3.1 Terms defined in Terminology B 899 shall apply unless
5
in Cast Form for Determination of Chemical Composition
defined otherwise in this standard.
4. Ordering Information
1
4.1 Orders for ingots under this specification shall include
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
the following information:
B02.04 on Zinc and Cadmium.
4.1.1 Quantity, lb,
Current edition approved May 10, 2002. Published July 2002. Originally
{1
4.1.2 Alloy type (see Table 1),
published as B 860 - 95. Last previous edition B 860 - 01 .
2
Annual Book of ASTM Standards, Vol 02.04. 4.1.3 Size, if not manufacturer’s standard,
3
Annual Book of ASTM Standards, Vol 14.02.
4
Discontinued; see 1997 Annual Book of ASTM Standards, Vol 03.05.
5
Annual Book of ASTM Standards, Vol 03.05.
6
Annual Book of ASTM Standards, Vol 01.01
*A Summary of Changes section appears at the end of this standard.
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B860–02
4.1.4 Specification number and year date
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