ISO 3506-6:2020
Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners — Part 6: General rules for the selection of stainless steels and nickel alloys for fasteners
This document specifies general rules and provides technical information on stainless steels and their properties, which are relevant when using other parts of the ISO 3506 series. It includes specifications for corrosion-resistant stainless steels and nickel alloys, which are suitable for the manufacture of fasteners.
It applies to austenitic, martensitic, ferritic and duplex (austenitic-ferritic) stainless steel grades and nickel alloys for fasteners, and is intended to be used together with the relevant parts of the ISO 3506 series.
Common designations of stainless steels and nickel alloys used for fasteners are given in Annex A.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Groups and grades of stainless steels
4.1 General
4.2 Stainless steel group A (austenitic structure)
4.2.1 General
4.2.2 Grade A1
4.2.3 Grade A2
4.2.4 Grade A3
4.2.5 Grade A4
4.2.6 Grade A5
4.2.7 Grade A8
4.3 Stainless steel group C (martensitic structure)
4.3.1 General
4.3.2 Grade C1
4.3.3 Grade C3
4.3.4 Grade C4
4.4 Stainless steel group F (ferritic structure) — Grade F1
4.5 Stainless steel group D (austenitic-ferritic structure)
4.5.1 General
4.5.2 Grades D2 and D4
4.5.3 Grades D6 and D8
4.6 Stainless steels and nickel alloys for elevated and high temperatures
5 Chemical composition specifications for stainless steels and nickel alloys
6 Resistance to stress corrosion cracking
7 Resistance to pitting and crevice corrosion
8 Resistance to intergranular corrosion
9 Susceptibility to formation of intermetallic compounds
10 Magnetic permeability properties of stainless steels
Annex A (informative) Common designations of stainless steels and nickel alloys used for fasteners
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Groups and grades of stainless steels
4.1 General
4.2 Stainless steel group A (austenitic structure)
4.2.1 General
4.2.2 Grade A1
4.2.3 Grade A2
4.2.4 Grade A3
4.2.5 Grade A4
4.2.6 Grade A5
4.2.7 Grade A8
4.3 Stainless steel group C (martensitic structure)
4.3.1 General
4.3.2 Grade C1
4.3.3 Grade C3
4.3.4 Grade C4
4.4 Stainless steel group F (ferritic structure) — Grade F1
4.5 Stainless steel group D (austenitic-ferritic structure)
4.5.1 General
4.5.2 Grades D2 and D4
4.5.3 Grades D6 and D8
4.6 Stainless steels and nickel alloys for elevated and high temperatures
5 Chemical composition specifications for stainless steels and nickel alloys
6 Resistance to stress corrosion cracking
7 Resistance to pitting and crevice corrosion
8 Resistance to intergranular corrosion
9 Susceptibility to formation of intermetallic compounds
10 Magnetic permeability properties of stainless steels
Annex A (informative) Common designations of stainless steels and nickel alloys used for fasteners
Bibliography