IS 1367 Pt.14-1984

标准号：IS 1367 Pt.14-1984
发布日期：1984/10/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：Covers the requirements of bolts, screws, studs and nuts-made from austenitic, ferritic and martensitic grades of corrosion-resistant stainless steels.1.1 Applicability— It is applicable only to fasteners after completion of manufacture;a) with nominal thread diameters from 1'6 up and including 39 mm,b) of any triangular ISO metric screw threads with diameters and pitches according to IS : 4218 'ISO metric screw threads', andc) of any shape;and additionally for nuts of any shape provided that:a) width across flats or outside diameter is not less than 1.45 times nominal diameter, andb) effective thread engagement is at least 0.6 times nominal diameter.1.2 This standard does not define corrosion or oxidation resistance in particular environments. It does specify grades for fasteners made from corrosion resistant stainless steels. Some have mechanical properties allowing use at temperatures down to — 200°C in air. Some have oxidation resistance allowing use at temperatures up to +800°C in air.1.3 Acceptable corrosion and oxidation performances and mechanical property values allowing use at elevated or sub-zero temperatures shall be the subject of agreement between the user and the manu-facturer wherever appropriate to the proposed service environment.