ASTM A1073/A1073M is the ASTM standard for using hand micrometers to measure the thickness of uncoated steel sheet and nonmetallic and metallic-coated steel sheet. It provides a consistent approach for thickness measurement where accuracy and repeatability matter in inspection and quality control. By defining a practical measurement practice, this standard helps users evaluate sheet products with greater confidence and supports more uniform results across purchasing, production, and testing activities.

ASTM A1073/A1073M standard overview

This ASTM standard addresses the use of hand micrometers as a measurement tool for sheet thickness. Its focus is on a practical test method practice rather than on product composition or performance requirements. In that role, ASTM A1073/A1073M helps establish a common technical basis for measuring uncoated steel sheet as well as nonmetallic and metallic-coated steel sheet. It is especially relevant when consistent thickness verification is needed for documentation, acceptance checks, or routine evaluation.

Where is ASTM A1073/A1073M used?

This standard is commonly used in laboratories, mills, inspectors’ workstations, and other quality-control settings where steel sheet thickness must be checked by hand micrometer. It is relevant for uncoated steel sheet and for sheet with nonmetallic or metallic coatings, where the measuring approach needs to be applied carefully and consistently. ASTM A1073/A1073M is useful wherever sheet material is received, verified, or compared against procurement or internal quality requirements.

Practical importance of ASTM A1073/A1073M

ASTM A1073/A1073M matters because it supports more reliable thickness measurements and reduces variability between users and locations. That consistency can help with compliance reviews, incoming inspection, product evaluation, and supplier quality checks. For organizations handling steel sheet, the standard can also aid traceability and reduce disputes over measured thickness values. In practice, it gives teams a clearer technical basis for using hand micrometers in routine measurement work.

• Hand micrometer thickness measurement practice
• Uncoated steel sheet application
• Nonmetallic and metallic-coated sheet evaluation
• Quality-control and inspection use
• Consistent thickness verification