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This article describes the contents of the Architects’ Guide to Stainless Steel, an online resource containing an extensive amount of architectural information concerning stainless steel. The topics covered include grade selection, product forms, durability, economics, production and fabrication, surface finish, joining, maintenance and cleaning. The computer aided learning package Stainless SteelCAL is also described.
British and ASTM (American Society for Testing and Materials) standards are listed in sections covering tolerances, passivation and cleaning and testing products in stainless steels. LAST REVIEWED 10th January 2012.
Aimed primarily at architects and specifiers, the BSSA Surface Finishes Pack provides details and guidance of the wide variety of stainless steel surface finishes available. The pack includes the ‘do’s’ and ‘don’ts’ in selecting and specifying surface finishes, together with information on maintenance, cleaning and an updated, classified resources section for further information (for ease of access, a USB stick is provided). Contained with a robust hard-back ring binder, the Surface Finishes Pack is complete with guides on applications as well as practical, technical information written very much with the end user in mind.
Additionally, there are extensive case studies showing exciting samples, both from the UK and across the world, illustrating just how versatile stainless can be. What makes this pack unique is the comprehensive range of samples it contains. These include machine-polished, electro-polished, brushed, 1 and 2-side patterned and even coloured. Provided by the BSSA’s own member companies, these will help users decide just which finish best suits their need while also giving them the opportunity to get up close to the stainless steel itself.
The BSSA Stainless Steel Surface Finishes Pack is available in the UK at a cost of £110.00 and £125 in the EU (including p&p)
Stainless steels are highly durable, but in certain service conditions may stain or discolour due to surface deposits. In order to achieve maximum corrosion resistance and aesthetic appeal, stainless steel surfaces must be kept clean. Factors affecting maintenance are outlined. Recommendations on the frequency of cleaning for architectural applications are given.
A cleaning frequency or schedule for external or various architectural application site types is shown and covers grades 1.4016 (430) 1.4301 (304) and 1.4401 (316). The sites include rural urban and coastal (marine). Cleaning suggestions for a range of situations are made. These include routine cleaning, removal of fingerprints, oil, grease marks, water marking, light rust staining, burnt on food, tea and coffee residues, mortar (cement) splashes, heavy discolouration, paint and graffiti. The dangers of using bleach (sodium hypochlorite) and hydrochloric acid based cleaning agents (brick mortar remover) are noted.
The Kolsterising process (formerly known as the Hardcor process) is marketed in the UK by Bodycote Heat Treatments Ltd, Aldridge (WS9 8BX). The process improves the wear and galling resistance of stainless steel part surfaces, without degrading their corrosion resistance. The fatigue and SCC resistance of the surfaces can also be enhanced. The process has been used on 1.4301 (304), 1.4307 (304L), 1.4401 (316), 1.4404 (316L) and 1.4462 (2205) stainless steel types.
A range of cleaning methods for stainless steel is described. Routine cleaning methods for light soiling (e.g. fingerprints, oil and grease marks, light rust staining) are given. These are followed by methods for cleaning stainless steel following vandalism, accident and neglect. (130)
Background information on the sources of chlorides within insulation materials is mentioned. The use of paint and aluminium foil barrier methods between the steel shell and insulation layer as a method of eliminating the risk of corrosion to the steel is also outlined.
This paper, presented by David Cochrane of NiDI at the IOM workshop, So You Want to Build it in Stainless Steel, firstly outlines mill and mechanically polished (brushed) finishes to EN 10088 part 2. Patterned finishes are also widely used in architectural applications and useful for reducing distortion and ?oil canning?. Bead blasted finishes are low reflectivity and non-directional. Electropolished finishes can facilitate in process cleaning on patterned floor plates. Coloured finishes are also very flexible and can be applied to dull or polished substrates or previously etched patterned surfaces. The range of surface roughness values for mill (2B) and polished (2J and 2K) surfaces is shown. The care needed when fabricating and installing stainless steel architectural items is discussed as well as maintenance and cleaning methods. Finally some stainless steel building cladding case studies are described that illustrate good grade and finish selection.
Ko Buijs of Van Leeuwen Stainless describes dry ice blasting as a method for removing surface corrosion from stainless steel. Reprinted from Stainless Steel World – April 2006