1 Scope
This document specifies the mechanical and physical properties of flat washers made
of corrosion resistant austenitic, ferritic and duplex stainless steels, designed to be used in bolted joints in combination with bolts, screws, studs and
nuts with specified grades and property classes in accordance with ISO 3506‑1 and ISO 3506‑2 .
These types of washers are also used with other stainless steel fasteners such as screws forming their own mating thread (see e.g. ISO 3506‑4 ).
ISO 3506‑6 provides general rules and additional technical information on suitable stainless steels and their properties (detailed properties of stainless steel grades, corrosion behaviour with regards to pitting, crevice and intergranular corrosion,
magnetic properties, etc.)
WARNING — Washers conforming to the requirements of this document are tested at the ambient
temperature range of 10 °C to 35 °C and are used in applications ranging from –20 °C
to +150 °C. However, these washers are also used outside this range down to –196 °C
and up to +300 °C for specific applications. It is possible that they do not retain
the specified mechanical and physical properties at lower and/or elevated temperatures.
Therefore, it is...