ASTM E18-20 rus PDF

Full title and description

ASTM E18-20 — Standard Test Methods for Rockwell Hardness of Metallic Materials. This entry refers to the E18–20 edition (2020) and the designation shown here includes an indication that a Russian-language (rus) translation or Russian-language product/record is intended. The standard defines Rockwell and Rockwell superficial hardness test methods, machine and indenter requirements, verification and standardization procedures, and associated annexes used for calibration and uncertainty estimation.

Abstract

ASTM E18-20 specifies procedures for determining Rockwell and Rockwell superficial hardness of metallic materials by indentation. It covers requirements for Rockwell hardness testing machines (including portable equipment), types and sizes of indenters, loading cycles and dwell times, specimen preparation and minimum thickness guidelines, verification and standardization of machines and indenters, and guidance for evaluating measurement uncertainty. The edition approved in 2020 contains both mandatory test method language and nonmandatory informative annexes (A1–A5) that provide verification, standardization and example procedures.

General information

• Status: Historical / Superseded by a later edition (current E18 editions revised after 2020).
• Publication date: Current edition approved in early 2020 (approved Feb 1, 2020; published March 2020 - shown in document metadata).
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: 77.040.10 — Mechanical testing of metals (indentation hardness testing).
• Edition / version: E18–20 (2020 edition).
• Number of pages: 39 pages (typical published PDF length for the 2020 edition).

Scope

The standard covers determination of Rockwell hardness and Rockwell superficial hardness of metallic materials using the Rockwell indentation principle. It provides the requirements for test machines and procedures, calibration/verification of machines and indenters, use and certification of standardizing test blocks, guidelines for specimen thickness and preparation, plus annex guidance for verification, standardizing machines and estimating uncertainty. Portable Rockwell testers that meet the method’s verification requirements are included; machines that cannot be directly verified are addressed by reference to other test methods.

Key topics and requirements

• Definition of Rockwell and Rockwell superficial hardness scales and applicable indenter types (diamond cone and hardened steel balls) and sizes.
• Specified loads (preliminary and total loads), dwell times and procedures to produce valid hardness readings.
• Verification and calibration procedures for Rockwell hardness testing machines (direct and indirect verification) and requirements for standardizing test blocks.
• Guidance on minimum specimen thickness for different scales and avoidance of substrate effects.
• Instructions for calculating and reporting uncertainty, repeatability and reproducibility of hardness measurements.
• Requirements and notes on portable Rockwell hardness testers and references to alternative verification tests (e.g., Test Method E110).

Typical use and users

Used by metallurgical and materials laboratories, heat-treatment and metalworking shops, quality-control and inspection departments in aerospace, automotive, heavy industry and manufacturing, instrument and equipment suppliers, and accreditation bodies. Typical applications include production testing, incoming inspection, process control, certification of heat-treated components, and machine standardization and calibration.

Related standards

ASTM E18 references and is used alongside related standards such as Test Method E110 (portable verification), Practice E29 (significant digits and rounding in test results), A370 (mechanical testing of steel products), and other hardness/indentation standards (Vickers, Brinell, Leeb methods). Newer editions of E18 (for example E18–22) supersede E18–20 and provide the most up-to-date requirements.

Keywords

Rockwell, Rockwell hardness, Rockwell superficial, hardness testing, indentation, indenter, Rockwell C, HRC, machine verification, standardizing blocks, uncertainty, metallic materials, portable hardness tester, ASTM E18.

FAQ

Q: What is this standard?

A: ASTM E18-20 is the 2020 edition of ASTM’s Standard Test Methods for Rockwell Hardness of Metallic Materials, which specifies procedures and requirements for performing Rockwell and Rockwell superficial hardness tests on metals.

Q: What does it cover?

A: It covers the Rockwell test principle, test scales and indenters, machine requirements, loading cycles and dwell times, specimen preparation and minimum thickness, verification and standardization of machines and indenters, and guidance on uncertainty and reporting. Informative annexes provide verification and standardization procedures.

Q: Who typically uses it?

A: Metallurgical laboratories, QC/inspection teams in manufacturing and heat-treatment facilities, instrument manufacturers and calibration laboratories, and accreditation bodies use the standard for routine hardness testing, calibration and certification.

Q: Is it current or superseded?

A: The E18–20 edition (2020) is a historical edition; it has been superseded by later editions (for example E18–22 and subsequent revisions). Users should consult the latest ASTM E18 edition for up-to-date requirements.

Q: Is it part of a series?

A: Yes. E18 is part of the family of ASTM test methods for hardness and mechanical testing. It is maintained by ASTM Committee E28 (Subcommittee E28.06 on Indentation Hardness Testing) and is published in periodic revisions (E18–19, E18–20, E18–22, etc.).

Q: What are the key keywords?

A: Rockwell, hardness, indentation, indenter, HRC, Rockwell superficial, machine verification, standard blocks, calibration, metallic materials.