Designation standards: ASTM E18-14 Note: WITHDRAWN Publication date standards: 1.1.2014 SKU: NS-43091 The number of pages: 38 Approximate weight : 114 g (0.25 lbs) Country: American technical standard Category:Technical standards ASTM
Keywords: hardness, mechanical test, metals, Rockwell, ICS Number Code 77.040.10 (Mechanical testing of metals)
Additional information
Significance and Use
4.1 The Rockwell hardness test is an
empirical indentation hardness test that can provide useful
information about metallic materials. This information may
correlate to tensile strength, wear resistance, ductility, and
other physical characteristics of metallic materials, and may be
useful in quality control and selection of materials.
4.2 Rockwell hardness tests are
considered satisfactory for acceptance testing of commercial
shipments, and have been used extensively in industry for this
purpose.
4.3 Rockwell hardness testing at a
specific location on a part may not represent the physical
characteristics of the whole part or end product.
4.4 Adherence to this standard test
method provides traceability to national Rockwell hardness
standards except as stated otherwise.
1. Scope
1.1 These test methods cover the
determination of the Rockwell hardness and the Rockwell superficial
hardness of metallic materials by the Rockwell indentation hardness
principle. This standard provides the requirements for Rockwell
hardness machines and the procedures for performing Rockwell
hardness tests.
1.2 This standard includes
additional requirements in annexes:
Verification of Rockwell Hardness Testing
Machines
Rockwell Hardness Standardizing
Machines
Standardization of Rockwell Indenters
Standardization of Rockwell Hardness Test
Blocks
Guidelines for Determining the Minimum
Thickness of a
Test Piece
Hardness Value Corrections When Testing
on Convex
Cylindrical Surfaces
1.3 This standard includes
nonmandatory information in appendixes which relates to the
Rockwell hardness test.
List of ASTM Standards Giving Hardness
Values Corresponding
to Tensile Strength
Examples of Procedures for Determining
Rockwell
Hardness Uncertainty
1.4 Units—At the time the
Rockwell hardness test was developed, the force levels were
specified in units of kilograms-force (kgf) and the indenter ball
diameters were specified in units of inches (in.). This standard
specifies the units of force and length in the International System
of Units (SI); that is, force in Newtons (N) and length in
millimeters (mm). However, because of the historical precedent and
continued common usage, force values in kgf units and ball
diameters in inch units are provided for information and much of
the discussion in this standard refers to these units.
1.5 The test principles, testing
procedures, and verification procedures are essentially identical
for both the Rockwell and Rockwell superficial hardness tests. The
significant differences between the two tests are that the test
forces are smaller for the Rockwell superficial test than for the
Rockwell test. The same type and size indenters may be used for
either test, depending on the scale being employed. Accordingly,
throughout this standard, the term Rockwell will imply both
Rockwell and Rockwell superficial unless stated otherwise.
1.6 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 and health practices and determine
the applicability of regulatory limitations prior to use.
Standard Specification for
Copper-Nickel-Tin Alloy, Copper-Nickel-Zinc Alloy (Nickel Silver),
and Copper-Nickel Alloy Plate, Sheet, Strip, and Rolled Bar
Standard Hardness Conversion Tables for
Metals Relationship Among Brinell Hardness, Vickers Hardness,
Rockwell Hardness, Superficial Hardness, Knoop Hardness,
Scleroscope Hardness, and Leeb Hardness (Includes all amendments
and changes 5/7/2019).
Standard Practice for Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method
ISO/IEC 17025
SAE J417
ABMA 10-1989
ISO 6508-1
Metallic MaterialsRockwell Hardness
TestPart 1: Test Method (scales A, B, C, D, E, F, G, H, K, N, T)
Available from American National Standards Institute (ANSI), 25 W.
43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Conformity AssessmentGeneral Requirements
for Accreditation Bodies Accrediting Conformity Assessment
Bodies
Standard Specification for Copper Sheet
and Strip for Building Construction
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