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  • ASTM
    B860-13 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
    Edition: 2013
    $91.10
    Unlimited Users per year

Description of ASTM-B860 2013

ASTM B860 - 13

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

Active Standard ASTM B860 | Developed by Subcommittee: B02.04

Book of Standards Volume: 02.04




ASTM B860

Abstract

This specification covers electrical contact components made from copper tungsten by powder metallurgical procedures. The material shall conform to the chemical composition limits as agreed upon between the manufacturer and the user. Qualification tests for determination of physical properties shall be performed on production parts, wherever practical or applicable. The tests shall be determined after consideration of the function of the part.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. The paper presented the chemical composition of these materials which include six master alloys of zinc aluminium; Type A-1, Type A-2, Type A-3, Type A-4, Type A-5, Type A-6, and one master alloy of zinc-antimony, Type S-1. The material covered by this specification shall be made of uniform quality and shall be free from harmful contamination. The alloys shall be tested and conform to the required chemical composition requirements.

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 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 six master alloys of zinc-aluminum (brightener) and one master alloy of zinc-antimony.

ASTM

Common

UNS

Type A-1

90/10 Zn/Al

High Purity

Z30750

Type A-2

90/10 Zn/Al

Low Purity

Z31710

Type A-3

95/5 Zn/Al

High Purity

Z30503

Type A-4

95/5 Zn/Al

Low Purity

Z31510

Type A-5

96/4 Zn/Al

High Purity

Z31520

Type A-6

96/4 Zn/Al

Low Purity

Z30504

Type S-1

90/10 Zn/Sb

Z55710


TABLE 1 Chemical Requirements Composition, % (Range or Maximum Value) A

Type A-1

90?% Zinc10?% Aluminum (90/10 Zn/Al)

High Purity

Type A-2

90?% Zinc10?% Aluminum (90/10 Zn/Al)

Low Purity

Type A-3

95?% Zinc5?% Aluminum (95/5 Zn/Al)

High Purity

Type A-4

95?% Zinc5?% Aluminum (95/5 Zn/Al)

Low Purity

Type A-5

96?% Zinc4?% Aluminum (96/4 Zn/Al)

High Purity

Type A-6

96?% Zinc4?% Aluminum (96/4 Zn/Al)

Low Purity

Type S-1

90?% Zinc10?% Antimony (90/10 Zn/Sb)

UNS B

Type A-1
90/10 Zn/Al
Z30750

Type A-2
90/10 Zn/Al
Z31710

Type A-3
95/5 Zn/Al
Z30503

Type A-4
95/5 Zn/Al
Z31510

Type A-5
96/4 Zn/Al
Z31520

Type A-6
96/4 Zn/Al
Z30504

Type S-1
90/10 Zn/Sb
Z55710

Fe

0.05 max

0.15 max

0.05 max

0.15 max

0.05 max

0.15 max

0.03 max

Pb

0.005 max

0.4 max

0.005 max

0.4 max

0.005 max

0.4 max

0.015 max

Cd

0.004 max

...

0.004 max

...

0.004 max

...

0.003 max

Cu

0.035 max

0.5 max

0.035 max

0.5 max

0.035 max

0.5 max

0.003 max

Mg

...

...

...

...

0.06 max

0.06 max

Sn

0.003 max

...

0.003 max

...

0.003 max

...

0.01 max

As

...

...

...

...

...

...

0.015 max

Al

9.510.5

9.510.5

4.55.5

4.55.5

4.0-4.5

4.0-4.5

...

Sb C

...

...

...

...

...

...

9.510.5

Others, Total

0.01 max

0.25 max

0.01 max

0.25 max

0.01 max

0.25 max

0.03 max

Zn D

Remainder

Remainder

Remainder

Remainder

Remainder

Remainder

Remainder

A The following applies to all specified limits in this table: For purposes of determining conformance with this specification, an observed value obtained from 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 method of Practice E29 .
B UNS numbers in conformance with Practice E527 .
C Chemical method under development.
D 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 elements listed above.
?Corrected editorially.

1.2 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.

1.3 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

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

brightener; zinc; zinc alloys; zinc-aluminum alloy; zinc-antimony alloy; zinc master alloys; zinc metal;


ICS Code

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


DOI: 10.1520/B0860-13

ASTM International is a member of CrossRef.

ASTM B860

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