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ASTM A956-12

Standard Test Method for Leeb Hardness Testing of Steel Products

Automaticky přeložený název:

Standardní zkušební metoda pro Leeb tvrdosti zkoušení výrobků z oceli

NORMA vydána dne 15.11.2012

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Informace o normě:

Označení normy: ASTM A956-12
Poznámka: NEPLATNÁ
Datum vydání normy: 15.11.2012
Kód zboží: NS-4996
Počet stran: 12
Přibližná hmotnost: 36 g (0.08 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Kategorie - podobné normy:

Mechanické zkoušení kovů

Anotace textu normy ASTM A956-12 :

Keywords:
dynamic hardness test, Equotip, Equotip hardness test, Leeb, rebound hardness test, ICS Number Code 77.040.10 (Mechanical testing of metals)

Doplňující informace

Significance and Use

5.1 Hardness of a material is a poorly defined term that may have many meanings depending on the type of test performed and the expectations of the person involved. The Leeb hardness test is of the dynamic or rebound type, which primarily depends both on the plastic and on the elastic properties of the material being tested. The results obtained are indicative of the strength and dependent on the heat treatment of the material tested.

5.2 The Leeb hardness test is a superficial determination only measuring the condition of the surface contacted. The results generated at that location do not represent the part at any other surface location and yield no information about the material at subsurface locations.

1. Scope

1.1 This test method covers the determination of the Leeb hardness of steel, cast steel, and cast iron (Part A), including the methods for the verification of Leeb hardness testing instruments (Part B), and the calibration of standardized test blocks (Part C).

1.2 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.

1.3 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

E691-23

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