On the correlation of hardness with tensile and yield strength

    Research output: Book/ReportReport

    9 Citations (Scopus)

    Abstract

    The relations between hardness and tensile properties of common metals have been reviewed and compared with available experimental data. Using the Cahoon formula the correlation of hardness with tensile strength is generally good (difference usually less than ± 10 %) provided that the strain hardening exponent n is known or can be estimated. The corresponding correlation with yield strength is somewhat less impressive but still reasonable (difference usually less than ± 15 %) if the value of n remains approximately constant and characterises the original material. Less satisfactory correlations may be obtained for multiphase materials or materials showing microstructural changes during plastic straining. Reliable determination of n from hardness-type indentations has not proved to be easy, and seems especially difficult to obtain from the same standard type hardness indentation which is used for hardness measurement. In spite of these limitations the available expressions correlating hardness with yield and tensile strength can be considered very useful.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages20
    ISBN (Print)951-38-2650-3
    Publication statusPublished - 1986
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
    Number416
    ISSN0358-5077

    Fingerprint

    Yield stress
    Tensile strength
    Hardness
    Indentation
    Tensile properties
    Strain hardening
    Plastics
    Metals

    Keywords

    • hardness
    • tensile strength
    • yield strength

    Cite this

    Auerkari, P. (1986). On the correlation of hardness with tensile and yield strength. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 416
    Auerkari, Pertti. / On the correlation of hardness with tensile and yield strength. Espoo : VTT Technical Research Centre of Finland, 1986. 20 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 416).
    @book{e3042ef9dc1e4dd6837290d7c09548cc,
    title = "On the correlation of hardness with tensile and yield strength",
    abstract = "The relations between hardness and tensile properties of common metals have been reviewed and compared with available experimental data. Using the Cahoon formula the correlation of hardness with tensile strength is generally good (difference usually less than ± 10 {\%}) provided that the strain hardening exponent n is known or can be estimated. The corresponding correlation with yield strength is somewhat less impressive but still reasonable (difference usually less than ± 15 {\%}) if the value of n remains approximately constant and characterises the original material. Less satisfactory correlations may be obtained for multiphase materials or materials showing microstructural changes during plastic straining. Reliable determination of n from hardness-type indentations has not proved to be easy, and seems especially difficult to obtain from the same standard type hardness indentation which is used for hardness measurement. In spite of these limitations the available expressions correlating hardness with yield and tensile strength can be considered very useful.",
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    Auerkari, P 1986, On the correlation of hardness with tensile and yield strength. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 416, VTT Technical Research Centre of Finland, Espoo.

    On the correlation of hardness with tensile and yield strength. / Auerkari, Pertti.

    Espoo : VTT Technical Research Centre of Finland, 1986. 20 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 416).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - On the correlation of hardness with tensile and yield strength

    AU - Auerkari, Pertti

    PY - 1986

    Y1 - 1986

    N2 - The relations between hardness and tensile properties of common metals have been reviewed and compared with available experimental data. Using the Cahoon formula the correlation of hardness with tensile strength is generally good (difference usually less than ± 10 %) provided that the strain hardening exponent n is known or can be estimated. The corresponding correlation with yield strength is somewhat less impressive but still reasonable (difference usually less than ± 15 %) if the value of n remains approximately constant and characterises the original material. Less satisfactory correlations may be obtained for multiphase materials or materials showing microstructural changes during plastic straining. Reliable determination of n from hardness-type indentations has not proved to be easy, and seems especially difficult to obtain from the same standard type hardness indentation which is used for hardness measurement. In spite of these limitations the available expressions correlating hardness with yield and tensile strength can be considered very useful.

    AB - The relations between hardness and tensile properties of common metals have been reviewed and compared with available experimental data. Using the Cahoon formula the correlation of hardness with tensile strength is generally good (difference usually less than ± 10 %) provided that the strain hardening exponent n is known or can be estimated. The corresponding correlation with yield strength is somewhat less impressive but still reasonable (difference usually less than ± 15 %) if the value of n remains approximately constant and characterises the original material. Less satisfactory correlations may be obtained for multiphase materials or materials showing microstructural changes during plastic straining. Reliable determination of n from hardness-type indentations has not proved to be easy, and seems especially difficult to obtain from the same standard type hardness indentation which is used for hardness measurement. In spite of these limitations the available expressions correlating hardness with yield and tensile strength can be considered very useful.

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    KW - tensile strength

    KW - yield strength

    M3 - Report

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    BT - On the correlation of hardness with tensile and yield strength

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Auerkari P. On the correlation of hardness with tensile and yield strength. Espoo: VTT Technical Research Centre of Finland, 1986. 20 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 416).