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ISO 3506-3-2009 pdf free download
ISO 3506-3-2009 pdf free download.Mechanical properties of corros ion- resistant stainless steel fasteners
Part 3:Set screws and similar fasteners not under tensile stress
Caracteristiques mécaniques des éléments de fixation en acier inoxydable resistant a Ia corrosion — Partie 3: Vis sans tête et éléments de fixation similaires non soumis a des contraintes de traction.
3.2.1 General
Marking of set screws and similar fasteners is not mandatory.
When set screws and similar fasteners manufactured to the requirements of this part of ISO 3506 are designated and marked, they shall be designated In accordance with the designation system described in 3.1 and marked in accordance with 3.2.2 and 3.2.3. However, the designation system described in 3.1 and the provisions for marking according to 3.2.3 shall be used only if all relevant requirements of this part of ISO 3506 are met.
3.2.2 Manufacturer’s identification mark
A manufacturer’s identification mark shall be included during the manufacturing process on all set screws and similar fasteners which are marked with a hardness class symbol, provided this is possible for technical reasons. Manufacturer’s identification marking is also recommended on set screws and similar fasteners which are not marked with a hardness class symbol.
3.2.3 Set screws and similar fasteners
When set screws and similar fasteners are marked, they shall be clearly marked in accordance with 3.1. The marking should include the steel grade and hardness class.
3.2.4 Packages
All packages for all types of set screws and similar fasteners of all sizes shall be marked (e.g. through labelling). The marking shall include the manufacturer’s and/or distributor’s identification and the marking symbol for the steel grade and hardness class according to Figure 1 and the manufacturing lot number, as defined in ISO 16426.
3.3 Finish
Unless otherwise specified, set screws and similar fasteners in accordance with this part of ISO 3506 shall be supplied clean and bright. For maximum corrosion resistance, passivation is recommended. When passivation is required, it shall be performed in accordance with ISO 16048. Set screws and similar fasteners that are passivated may additionally be marked with the symbol P after the symbols for steel grade and hardness class (see footnote c of Figure 1).
For set screws and similar fasteners manufactured to a specific order, the additional marking should be applied to both the fastener and the label. For set screws and similar fasteners delivered from stock, the additional marking should be applied to the label.
4 Chemical composition
The chemical compositions of stainless steels suitable for set screws and similar fasteners in accordance with this part of ISO 3506 are given in Table 2.
NOTE The chemical compositions given in Table 2 correspond with the chemical compositions given in ISO 3506-1:2009, Table 1. for the relevant steel grades.
The final choice of the chemical composition within the specified steel grade is at the discretion of the manufacturer, otherwise by prior agreement between the purchaser and the manufacturer.
In applications where risk of intergranular corrosion is present. testing in accordance with ISO 3651-1 or ISO 3651-2 is recommended. In such cases, stabilized stainless steels of grades A3 and A5 or stainless steels of grades A2 and A4 with carbon content not exceeding 0.03 % are recommended.ISO 3506-3-2009 pdf free download.
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