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  • ASTM
    A255-10(2014) Standard Test Methods for Determining Hardenability of Steel
    Edition: 2014
    $148.51
    Unlimited Users per year

Description of ASTM-A255 2014

ASTM A255-10-Reapproved2014

Historical Standard: Standard Test Methods for Determining Hardenability of Steel




ASTM A255

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:

 

Element

Range, %

 

 

 

 

Carbon

0.10–0.70

 

Manganese

0.50–1.65

 

Silicon

0.15–0.60

 

Nickel

1.50 max

 

Chromium

1.35 max

 

Molybdenum

0.55 max

 

Copper

0.35 max

 

Vanadium

0.20 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.

(A) A variation of ±10°F (6°C) from the temperatures in this table is permissible.
(B) Normalizing and austenitizing temperatures are 50°F (30°C) higher for the 6100 series.

1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

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 Code

ICS Number Code 77.080.20 (Steels)


DOI: 10.1520/A0255-10R14

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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