ISO 898-3:2018 PDF

Scope: 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.

ISO 898-3:2018 Referenced Document

ISO 10644:2009 Screw and washer assemblies made of steel with plain washers - Washer hardness classes 200 HV and 300 HV
ISO 10669:1999 Plain washers for tapping screw and washer assemblies - Normal and large series - Product grade A
ISO 10673:2009 Plain washers for screw and washer assemblies - Small, normal and large series - Product grade A
ISO 10684:2004 Fasteners - Hot dip galvanized coatings
ISO 18265:2013 Metallic materials.Conversion of hardness values
ISO 1891-4:2018 Fasteners — Vocabulary — Part 4: Control, inspection, delivery, acceptance and quality*， 2018-05-23 Update
ISO 6507-1:2018 Metallic materials - Vickers hardness test - Part 1: Test method
ISO 6508-1:2016 Metallic materials - Rockwell hardness test - Part 1: Test method
ISO 898-1:2013 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread
ISO 898-2:2012 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes - Coarse thread and fine pitch thread
ISO/TR 20491 Fasteners — Fundamentals of hydrogen embrittlement in steel fasteners*， 2019-02-19 Update

2020 ISO 898-3:2018/Amd 1:2020 Mechanical properties of fasteners made of carbon steel and alloy steel — Part 3: Flat washers with specified property classes — Amendment 1
2018 ISO 898-3:2018 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 3: Flat washers with specified property classes