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SCI Design Guide for stainless steel
This article covers how to design stainless steel bolts, (fasteners), subject to shear and tension forces. Shear and tension capacities for bolts of property class 50, 70 and 80 from diameter M10 to M24 are given. (207)
Paper originally delivered at the BSSA Conference ‘Stainless Solutions for a Sustainable Future’ held in Rotherham on 3rd April 2003. This paper describes a study where 2 high strength austenitic stainless steels and 3 carbon steels used at Volvo Cars Body Components, were compared. The differences in formability and crash absorbing capability of specific components made from these steels, during plastic deformation, are shown. Tensile, (stress-strain curves), and forming limit curves are compared. Forming limit dome tests are better for assessing steels subject to microstructural changes during deformation. Component stamping trials are described and analysed.
This article describes what types of structural stainless steel sections are available and how they can be procured. It outlines what sections are available ex-stock and which may need to be made-to-order. Ranges of dimensions for hollow and bar sections are given.
Basic design data for the grades of stainless steel typically used in structural applications are presented. This includes design strength, (py), expressed as the specified proof strength, Young’s modulus, (modulus of elasticity), Poisson’s ratio, shear modulus, density, thermal expansion coefficient, thermal conductivity and heat capacity. Brief guidance on designing structural stainless steel is also given, where the differences between carbon steel and stainless steel’s buckling resistance and member deflections are explained. Grades listed include type 304, 304L, 316, 316L and 2205, European steel grades 1.4301, 1.4307, 1.4401, 1.4404, 1.4462, duplex (141)
Structural stainless steel sections are being used increasingly as the particular characteristics of stainless steel are more widely understood. This article provides a link to the Stainless Steel Sections Directory which shows data on the sections available and the potential suppliers of such sections
Maximum breaking torque values for property class 50, 70 and 80 austenitic fastener grades A1, A2, A3 A4 and A5 taken from BS EN ISO 3506-1 are shown. A link is provided to the Bufab website where maximum tightening torque, yield load and failure load for austenitic stainless steel fasteners are tabulated.
The optimisation of corrosion resistance and cleanability through the use of Automatic Penetration Control. Author – Ko Buis of Van Leeuwen Stainless. Reprinted from Stainless Steel World July/August 2007.
The importance of good design and surface finish selection for the successful fabrication of stainless steel is outlined along with some of the properties that can affect the fabrication and performance of stainless steels. These include thermal conductivity, thermal expansion coefficient and the risks of galling, (pick-up).The hazard of iron contamination from carbon steel pick-up is mentioned and that welding oxide or heat treatment scale should be removed prior to service.
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