ASTM B724-00(2006)
Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Newage, Portable, Non-Caliper-Type Instrument

Standard No.

ASTM B724-00(2006)

Release Date

2000

Published By

American Society for Testing and Materials (ASTM)

Status

Withdraw 2013-10

Latest

ASTM B724-00(2006)

Scope

The instrument may be used on a variety of geometries of aluminum alloy test pieces, providing the surface being tested has proper support for the instrument.

This test method is intended for quality assurance and production control purposes. This test method is not intended to be an independent material-acceptance test.

The thickness of the test piece shall be such that a mark or bulge is not produced on the reverse side of the test piece and the test piece does not deflect during the test.

Calibration of the instrument through the use of reference blocks is required for true comparative hardness values.

1.1 This test method covers indentation hardness testing of aluminum alloys using a Newage, portable, non-caliper-type, hardness instrument which provides readout values numerically equivalent to Rockwell B-scale as determined by Test Methods E 18.

Note 1

This is a comparative Rockwell B test and does not provide an actual Rockwell B test value. HRBN, the values obtained from the Newage instrument, are numerically equivalent to Rockwell B values, but do not represent an actual Rockwell B test in accordance with Test Methods E 18.

1.2 This test method measures indentation hardness of heat-treatable aluminum alloys having a hardness from 30 to 100 HRBN, a thickness greater than 1.50 mm (0.060 in.), and pieces too large to be tested by a caliper type instrument.

Note 2

This test method covers two instruments (one analog and one digital) which operate differently. Refer to the manufacturer''s instruction for proper operation.

1.3 The flat surface size of the area being tested must be compatible with the instrument support area and the material must not deflect during the test.

1.4 The values stated in SI units are the standard. The values given in parentheses are for information only.

ASTM B724-00(2006) Referenced Document

• ASTM B648 Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Barcol Impressor
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E18 Standard Test Methods for Rockwell Hardness of Metallic Materials
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM B724-00(2006) history

• 2000 ASTM B724-00(2006) Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Newage, Portable, Non-Caliper-Type Instrument
• 2000 ASTM B724-00 Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Newage, Portable, Non-Caliper-Type Instrument