American Association of State Highway and Transportation Officials Standard AASHTO No: M120-77
Standard Speciﬁcation for
This standard is issued under the ﬁxed designation B 6; 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 theyear of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 1.1 This speciﬁcation covers zinc metal made from ore or other material by a process of distillation or by electrolysis in three grades as follows: 1.1.1 Special High Grade, 1.1.2 HighGrade, 1.1.3 Prime Western.
NOTE 1—Certain continuous galvanizing grades are speciﬁed in Speciﬁcation B 852. Other continuous galvanizing and controlled lead grades are not included in this speciﬁcation but are covered by speciﬁc user purchasing speciﬁcations.
1.2 This speciﬁcation does not cover zinc produced by “sweating” or remelting of secondary zinc. 1.3 The values stated in inch-poundunits are to be regarded as the standard. The values given in parentheses are for information only. 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 Data Sheet for this product/material as provided bythe manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 The following documents of the issue in effect on the date of material purchase form a part of this speciﬁcation to the extent referenced herein. 2.2 ASTM Standards: 2 B 852 Speciﬁcation for Continuous Galvanizing Grade (CGG)Zinc Alloys for Hot-Dip Galvanizing of Sheet Steel
1 This speciﬁcation is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zinc and Cadmium. Current edition approved Nov. 1, 2003. Published November 2003. Originally approved in 1911. Last previous edition approved in 2000 as B 6 – 00. 2 For referenced ASTMstandards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at email@example.com. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.
B 899 Terminology Relating to Non-ferrous Metals and Alloys B 914 Practice for Color Codes on Zinc and Zinc Alloy Ingot for Use in Hot-Dip Galvanizing of Steel E 29 Practice forUsing Signiﬁcant Digits in Test Data to Determine Conformance with Speciﬁcations E 47 Test Methods for Chemical Analysis of Zinc DieCasting Alloys3 E 88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition E 527 Practice for Numbering Metals and Alloys (UNS) E 536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys 3. Terminology 3.1 Termsshall be deﬁned in accordance with Terminology B 899. 3.2 Deﬁnitions of Terms Speciﬁc to This Standard: 3.2.1 Special High Grade, n—a high purity grade of zinc containing a minimum of 99.990 % zinc, with controlled impurity levels, as speciﬁed in Table 1. 3.2.2 High Grade, n—a grade of zinc containing a minimum of 99.90 % zinc, with controlled impurity levels, as speciﬁed in Table 1. 3.2.3 PrimeWestern, n—a grade of zinc containing 0.5–1.4 % lead, a minimum of 98.0 % zinc, with controlled impurity levels, as speciﬁed in Table 1. 3.3 Abbreviations: 3.3.1 SHG—Special High Grade Zinc 3.3.2 HG—High Grade Zinc 3.3.3 PW—Prime Western Zinc 4. Ordering Information 4.1 Orders for zinc metal under this speciﬁcation shall include the following information: 4.1.1 ASTM designation and year of...