ASTM-A255 Standard Test Methods for Determining Hardenability of Steel

ASTM-A255 - 2020A EDITION - CURRENT
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Standard Test Methods for Determining Hardenability of Steel
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Scope

1.1 These test methods cover the identification and description of test methods for determining the hardenability of steels. The two test methods include the quantitative end-quench or Jominy Test and a method for calculating the hardenability of steel from the chemical composition based on the original work by M. A. Grossman.

1.2 The selection of the test method to be used for determining the hardenability of a given steel shall be agreed upon between the supplier and user. The Certified Material Test Report shall state the method of hardenability determination.

1.3 The calculation method described in these test methods is applicable only to the range of chemical compositions that follow:

ElementRange, %
Carbon0.10-0.70
Manganese0.50-1.65
Silicon0.15-0.60
Chromium1.35 max
Nickel1.50 max
Molybdenum0.55 max

1.4 Hardenability is a measure of the depth to which steel will harden when quenched from its austenitizing temperature (Table 1). It is measured quantitatively, usually by noting the extent or depth of hardening of a standard size and shape of test specimen in a standardized quench. In the end-quench test the depth of hardening is the distance along the specimen from the quenched end which correlates to a given hardness level.

1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

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.

Keywords

end-quench hardenability; hardenability; ICS Number Code 77.080.20 (Steels)

To find similar documents by ASTM Volume:

01.05 (Steel--Bars, Forgings, Bearing, Chain, Tool)

To find similar documents by classification:

77.080.20 (Steels)

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Document Number

ASTM-A0255-20A

Revision Level

2020A EDITION

Status

Current

Modification Type

Title Change

Publication Date

Nov. 16, 2020

Document Type

Test Method

Page Count

26 pages

Committee Number

A01.15