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Significance and Use
4.1 This practice provides procedures commonly used for measuring the thickness of steel sheet products under the jurisdiction of ASTM Committees A01 and A05 and their subcommittees as designated by a purchaser in a purchase order or contract.
4.2 Thickness is a significant quality characteristic of steel sheet products. The ability to accurately measure thickness using hand micrometers is critical in determining product conformance to specifications. The procedures for measuring thickness characteristics of steel sheet products are provided so that purchasers and suppliers have common measuring procedures for thickness measurements. The intention of these measuring methods is not to provide dimensional specifications for thickness characteristics, but rather common procedures for quantifying thickness values. For determining compliance with thickness specifications, references are provided to appropriate ASTM standards.
4.3 This practice may be used by other ASTM Committees and other standards writing bodies for the purpose of measuring thickness of metal sheet products.
1.1 This practice covers definitions and procedures for measuring the thickness of uncoated steel sheet and nonmetallic and metallic-coated steel sheet. The methods described are designed and intended for use in both laboratory and plant situations and their environments.
1.2 The flat steel product shall conform to all the requirements of the appropriate specifications as follows: Specifications , , , , , and .
1.3 Quantitative limits are not addressed and are established in the general requirements, or individual product specifications, or both; or when applicable, as agreed to between supplier and user.
1.4 Units—This specification is applicable to orders in either inch-pound units or SI units. Values in inch-pound and SI units are not necessarily equivalent. Within the text, SI units are shown in brackets. Each system shall be used independently of the other.
1.5 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A109/A109M Specification for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-Rolled
A505 Specification for Steel, Sheet and Strip, Alloy, Hot-Rolled and Cold-Rolled, General Requirements for
A568/A568M Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for
A635/A635M Specification for Steel, Sheet and Strip, Heavy-Thickness Coils, Hot-Rolled, Alloy, Carbon, Structural, High-Strength Low-Alloy, and High-Strength Low-Alloy with Improved Formability, General Requirements for
A684/A684M Specification for Steel, Strip, High-Carbon, Cold-Rolled
A902 Terminology Relating to Metallic Coated Steel Products
A924/A924M Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process
ICS Number Code 25.220.40 (Metallic coatings)
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ASTM A1073 / A1073M-21, Standard Practice for Using Hand Micrometers to Measure the Thickness of Uncoated Steel Sheet and Nonmetallic and Metallic-Coated Steel Sheet, ASTM International, West Conshohocken, PA, 2021, www.astm.orgBack to Top