BS ISO 4384-2-2022 pdf free download.Plain bearings — Hardness testing of bearing metals Part 2: Solid materials
This document specifies parameters for the hardness testing of solid materials for plain bearings made from cast and wrought copper and aluminium alloys by machining and forming, of their wrought products and ingots, and of tin‑based ingots. This document is a supplement to existing International Standards on hardness testing and, therefore, includes only the extensions and restrictions for
observation compared to those publications.
Owing to the heterogeneous structural composition of the majority of these bearing metals, a Brinell test is used.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters
ISO 6506‑1, Metallic materials — Brinell hardness test — Part 1: Test method
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Specimen
The surface of the specimen in the test area shall be metallic bright and conditioned in such a way that a satisfactory measurement of the test indentation is possible. During the preparation of the specimens,it shall be ensured that the material is not heated.
The testing of cast and wrought copper and aluminium alloys shall always be carried out on turned or filed and subsequently prepared surfaces, with the exception of hot-pressed parts.
If the manufacturing method permits, the specimens shall be carefully ground. In the case of lead and tin alloys with a total height of roughness profile of R t ≤ 6 µm according to ISO 4287, the grinding may be carried out with abrasive paper of grain size P 240 and in the case of copper and aluminium alloys with a roughness value of R t ≤ 4 µm, with abrasive paper of grain size P 320 and with a suitable lubricant.BS ISO 4384-2 pdf download.