BS EN ISO 3506-4:2009 PDF

Scope: This part of ISO 3506 specifies the mechanical properties of tapping screws made from austenitic, martensitic and ferritic grades of corrosion-resistant stainless steels when tested at an ambient temperature range of 15 °C to 25 °C. Properties vary between higher and lower temperatures. It applies to tapping screws with threads from ST2,2 up to and including ST8 in accordance with ISO 1478. It does not apply to screws with special properties such as weldability. This part of ISO 3506 does not define corrosion or oxidation resistance in particular environments, however some information on materials for particular environments is given in Annex D. Regarding definitions of corrosion and corrosion resistance see ISO 8044. The aim of this part of ISO 3506 is a classification into property classes of corrosion-resistant stainless-steel fasteners. Corrosion and oxidation performances and mechanical properties for use at elevated or sub-zero temperatures should be agreed between user and manufacturer in each particular case. Annex C shows how the risk of intergranular corrosion at elevated temperatures depends on the carbon content. All austenitic stainless-steel fasteners are normally non-magnetic in the annealed condition; after cold working, some magnetic properties may be evident (see Annex E).

BS EN ISO 3506-4:2009 Referenced Document

ISO 1478:1999 Tapping screws thread
ISO 16048:2003 Passivation of corrosion-resistant stainless-steel fasteners
ISO 3651-1:1998 Determination of resistance to intergranular corrosion of stainless steels - Part 1: Austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in nitric acid medium by measurement of loss in mass (Huey test)
ISO 3651-2:1998 Determination of resistance to intergranular corrosion of stainless steels - Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in media containing sulfuric acid
ISO 6507-1:1997 Metallic materials - Vickers hardness test - Part 1: Test method

2009 BS EN ISO 3506-4:2009 Mechanical properties of corrosion-resistant stainless steel fasteners - Tapping screws
2003 BS EN ISO 3506-4:2003 Mechanical properties of corrosion-resistant stainless-steel fasteners - Tapping screws