ASTM E18−15 

Standard Test Methods for Rockwell Hardness of Metallic Materials

An American National Standard

代号说明：

This standard is issued under the fixed designation E18; 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 the year of last reapproval. A superscript epsilon (ε) indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the U.S. Department of Defense.

中文名称：

ASTM E18-15

金属材料洛氏硬度标准试验方法

标准状态：已作废

替代情况：替代ASTM E18-12, 被ASTM E18-16替代

标准正文

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 Annex A1

Rockwell Hardness Standardizing Machines         Annex A2

Standardization of Rockwell Indenters                 Annex A3

Standardization of Rockwell Hardness Test Blocks Annex A4

Guidelines for Determining the Minimum Thickness 

            of a Test Piece                                                         Annex A5

Hardness Value Corrections When Testing on Convex 

            Cylindrical Surfaces                                                        Annex A6

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 Appendix X1

Examples of Procedures for Determining Rockwell Hardness Uncertainty        Appendix X2

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. 

2. Referenced Documents

2.1 ASTM Standards:3

A370 Test Methods and Definitions for Mechanical Testing of Steel Products

A623 Specification for Tin Mill Products, General Requirements

A623M Specification for Tin Mill Products, General Requirements [Metric]

B19 Specification for Cartridge Brass Sheet, Strip, Plate, Bar, and Disks 

B36/B36M Specification for Brass Plate, Sheet, Strip, And Rolled Bar 

B96/B96M Specification for Copper-Silicon Alloy Plate, Sheet, Strip, and Rolled Bar for General                   Purposes and Pressure Vessels

B103/B103M Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar

B121/B121M Specification for Leaded Brass Plate, Sheet, Strip, and Rolled Bar

B122/B122M Specification for Copper-Nickel-Tin Alloy, Copper-Nickel-Zinc Alloy (Nickel Silver), and             Copper-Nickel Alloy Plate, Sheet, Strip, and Rolled Bar

B130 Specification for Commercial Bronze Strip for Bullet Jackets

B134/B134M Specification for Brass Wire

B152/B152M Specification for Copper Sheet, Strip, Plate, and Rolled Bar

B370 Specification for Copper Sheet and Strip for Building Construction

E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

E92 Test Method for Vickers Hardness of Metallic Materials (Withdrawn 2010)

E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness,             Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness

E384 Test Method for Knoop and Vickers Hardness of Materials

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

2.2 American Bearings Manufacturer Association Standard:

ABMA 10-1989 Metal Balls5

2.3 ISO Standards:

ISO 6508-1 Metallic Materials—Rockwell Hardness Test—Part 1: Test Method (scales A, B, C, D, E, F,             G, H, K, N, T)

ISO/IEC 17011 Conformity Assessment—General Requirements for Accreditation Bodies Accrediting                   Conformity Assessment Bodies

ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories

2.4 Society of Automotive Engineers (SAE) Standard:

SAE J417 Hardness Tests and Hardness Number Conversions