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About This Item

 

Full Description

ISO 48:2007 specifies four methods for the determination of the hardness of vulcanized or thermoplastic rubbers on flat surfaces (standard hardness methods) and four methods for the determination of the apparent hardness of curved surfaces (apparent-hardness methods). The hardness is expressed in international rubber hardness degrees (IRHD). The methods cover the hardness range from 10 IRHD to 100 IRHD.

The methods differ primarily in the diameter of the indenting ball and the magnitude of the indenting force, these being chosen to suit the particular application.

The determination of hardness by a pocket hardness meter is described in ISO 7619‑2.

Determination of the apparent hardness of rubber-covered rollers is dealt with separately in the various parts of ISO 7267.

 

Document History

  1. ISO 48-1:2018


    Rubber, vulcanized or thermoplastic - Determination of hardness - Part 1: Introduction and guidance

    • Most Recent
  2. ISO 18517:2015


    Rubber, vulcanized or thermoplastic - Hardness testing - Introduction and guide

    • Historical Version
  3. ISO 48:2010


    Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD)

    • Historical Version
  4. ISO 48:2007

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    Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD)

    • Historical Version
  5. ISO 18517:2005


    Rubber, vulcanized or thermoplastic - Hardness testing - Introduction and guide

    • Historical Version
  6. ISO 48:1994


    Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD)

    • Historical Version
 

Amendments, rulings, supplements, and errata

  1. ISO 48/Cor1:2009

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    Vulcanized rubbers - Determination of hardness (Hardness between 30 and 85 IRHD) - Corrigendum