This specification covers grades of zinc alloys, commonly known as continuous galvanizing grade (CGG) alloys that contain aluminum, or aluminum and lead and that are used in continuous hot-dip galvanizing of steel sheet. CGG alloy shall be tested and conform to the chemical composition requirements as determined by chemical analysis on samples taken. CGG alloy castings shall be free of undue surface oxide, adhering foreign matter, and any flash that would interfere with handling and use. Samples obtained during casting, drilling or sawing shall be analyzed individually and the average of the individual determinations for the samples from the lot shall be reported as the analysis of the lot.
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1.1 This specification covers grades of zinc alloys, commonly known as Continuous Galvanizing Grade (CGG) alloys that contain aluminum, or aluminum and lead and that are used in continuous hot-dip galvanizing of steel sheet. The compositions for CGG grades made from primary zinc are shown in Table 1. Exceptions for grades made from secondary zinc are found in footnote C.
1.2 Other alloy compositions not included in B852, and as may be agreed upon between the producer and the user, may be used for continuous galvanizing.
1.3 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.
1.4 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 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.
TABLE 1 Chemical Requirements
|Z80310|| 0.25||...||0.22 to 0.28||0.007 max|
|Z80411|| 0.35||...||0.31 to 0.39||0.007 max|
|Z80511|| 0.45||...||0.40 to 0.50||0.007 max|
|Z80531|| 0.45||0.02||0.40 to 0.50||0.01 to 0.03|
|Z80610|| 0.55||...||0.49 to 0.61||0.007 max|
|Z80710|| 0.65||...||0.58 to 0.72||0.007 max|
|Z80810|| 0.75||...||0.67 to 0.83||0.007 max|
|Z80910||1.00||...||0.90 to 1.10||0.007 max|
| || || || |
|Impurities, %:|| IronC||0.0075 max|
| Cadmium||0.01 max|
| Copper||0.01 max|
| Other Elements||total of 0.01 max|
|Zinc:|| ||balance by difference|
A UNS numbers in conformance with Practice E527.
B For purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded 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.
C Lead and Iron levels of 0.01 % max and 0.01 % max respectively are allowed for CGG alloys produced from secondary zinc.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block Ingot
B899 Terminology Relating to Non-ferrous Metals and Alloys
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
E634 Practice for Sampling of Zinc and Zinc Alloys by Spark Atomic Emission Spectrometry
ISO3815-2 Zinc and zinc alloys Part 2: Analysis by inductively coupled plasma optical emission spectrometry
CGG alloy; Continuous Galvanizing Grade Zinc; zinc; zinc alloy; zinc metal;
ICS Number Code 77.120.60 (Lead, zinc, tin and their alloys)
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