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BS EN ISO 898-3:2018+A1:2021

BS EN ISO 898-3:2018+A1:2021

$142.49

Fasteners. Mechanical properties of fasteners made of carbon steel and alloy steel – Flat washers with specified property classes

Published By Publication Date Number of Pages
BSI 2021 28
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This document specifies mechanical and physical properties of flat washers, designed to be used in bolted joints in combination with bolts, screws, studs and nuts with a specified property class in accordance with ISO 898‑1 and ISO 898‑2.

NOTE 1 These types of washers can also be used with other fasteners such as screws forming their own mating thread.

Washers that conform to the requirements of this document are evaluated at an ambient temperature range of 10 °C to 35 °C. They might not retain the specified mechanical and physical properties at elevated temperatures and/or lower temperatures.

NOTE 2 Washers conforming to the requirements of this document are used in applications ranging from −50 °C to +150 °C. Users are advised to consult an experienced fastener expert for temperatures outside this range and up to a maximum temperature of +300 °C when determining appropriate choices, or for critical applications.

This document is applicable to the following flat captive and non-captive washers made of carbon steel or alloy steel, with thickness from 0,2 mm to 12 mm:

  • plain washers (with or without knurls, ribs or chamfers);

  • square washers;

  • square hole washers;

  • shaped plates.

It does not specify requirements for the following properties:

  • corrosion resistance;

  • weldability.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 European foreword
Anchor 2
European foreword to amendment A1
8 Foreword
9 Introduction
11 1 Scope
2 Normative references
12 3 Terms and definitions
4 Symbols
5 Designation system for property classes of washers and combination with property classes of bolts, screws, studs and nuts
13 6 Materials
14 7 Mechanical and physical properties
15 8 Test methods
8.1 Hardness test
8.1.1 General
16 8.1.2 Hardness test on the washer bearing surface
19 8.1.3 Hardness determined on a transverse radial section through the washer
20 8.2 Decarburization test
8.2.1 General
8.2.2 Microscopic method
21 8.2.3 Hardness method
22 8.3 Carburization test
8.3.1 General
8.3.2 Test procedure
8.3.3 Requirements
8.4 Retempering test
8.4.1 General
8.4.2 Test procedure
8.4.3 Requirements
23 9 Marking
9.1 General
9.2 Marking of washers
9.3 Marking of packages
24 Annex A (normative) Ductility test for washers of property class 380HV
27 Bibliography

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BS EN ISO 898-3:2018+A1:2021
$142.49