International standard translation of ISO 2566-1:2021 Steel elongation conversion part 1: Carbon steel and low alloy steel

International standard translation

steel elongation conversion

Part 1 :

carbon steel and low alloy steel

1 range

This standard specifies the conversion method between the elongation after break of various proportional and non-proportional gauge lengths at room temperature.

Elongation conversion is carried out according to formula ( 1). Formula ( 1 ) is applicable to carbon steel, carbon-manganese steel, molybdenum steel in the hot-rolled, normalized or annealed condition (whether tempered or not) with a tensile strength in the range of 300 N/mm ² - 700 N/mm ²and chrome molybdenum steel.

The conversion method in this standard is not applicable to the following steel products:

a ) cold rolled steel;

b ) quenched and tempered steel;

c ) austenitic steel;

The conversion method of this standard is not applicable to gauge lengths exceeding 25 Or samples with an aspect ratio exceeding 20.

2 reference standards

No normative reference has been adopted in this document.

3 Terms, definitions and symbols

3.1 Terms and Definitions

The following terms and definitions apply to this standard.

ISO and IEC maintain terminology databases for standardization at the following addresses:

— ISO online browsing platform: https://www.iso.org/obp

— IEC Electronic Encyclopedia: https://www.electropedia.org/

3.1.1

gauge length

Specimen Parallel Length for Determination of Specimen Strain

Note 1 : In the following, this term refers to the original gauge length L ₀ marked on the sample , which is used to determine the elongation A after breaking .

3.1.2

Proportional gauge length

gauge length having a specific relationship to the square root of the cross-sectional area (see 3.1.1 ), such as 5.65

3.1.3

non-proportional gauge length

gauge length not specifically related to the cross-sectional area of ​​the specimen (see 3.1.1 ), usually expressed in a given dimension, eg 50 mm

3.2 Symbols

A   Measured gauge elongation after break

A _r   According to conversion requirements, the elongation of different gauge lengths

d   sample diameter

L ₀   The original gauge length of the sample

S ₀   Original cross-sectional area of ​​sample

4 basic formula

The data contained in this document are based on Oliver's formula [1] , which is now widely used for such elongation conversions. Oliver's formula can be simplified to formula ( 1 ):

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