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Chemical composition of corrosion resistant stainless steels by material number

The standard series ISO 3506 specifies the composition ranges for the different stainless steels, which are used for fasteners. As an example, a possible selection of suitable material numbers is specified according to the European designation system for steels, depending on the steel group.

Other material designations according to American, Japanese or other standards, which are not mentioned here, may also be within the chemical composition range according to the standard ISO 3506 and may be used for fasteners as well.

The chemical compositions of the most common grades for the different steel groups are given in the following table.

Chemical comp of corrosion resistant stainless steel by material number

Chemical comp of corrosion resistant stainless steel by material number

1) Austenitic stainless steels with particular resistance to chloride induced stress corrosion.
The risk of failure of bolts, screws and studs by chloride induced stress corrosion can be reduced by using the materials marked in the table.
Especially recommended for critical fastening elements in indoor pools and proven in practice: 1.4529, 1.4547 and 1.4565.
2) Special grade, labeling / steel group not specified in the standard 3506
3) Can be identified as steel grade D4, if %C + 3,3%Mo + 13%N > 24.