Marine Shafting Alloys TD01 INTRODUCTION TO MARINE SHAFTING ALLOYS. Over the past few years there has been a significant change in shafting materials, away from the traditional 316 stainless steels, towards more advanced 'duplex' metallurgically structured, high performance stainless steel alloys. This range of duplex alloys offers the designer substantially increased physical properties, particularly strength, and markedly improved resistance to crevice corrosion and corrosion fatigue. Whilst 316 series stainless steels are excellent materials for general use, duplex alloys are now preferred. These alloys offer much higher strength and are more cost effective than other high performance stainless steels and more exotic materials. Consequently, duplex stainless alloy shafts can safely be designed with substantially reduced diameters compared to those made of the 316 series, giving the architect and boat constructor much greater freedom than previously, and often providing significant weight saving advantages. AQUALOY 30 This high performance second generation Duplex stainless alloy is recommended as having one of the finest combinations of properties for propeller shafting and is highly competitive in price. The alloy has excellent corrosion fatigue resistance properties, and combined with high strength and ductility, enables the use of comparatively smaller shaft diameters. The consequent reduction in weight, and size of associated gear offers improved boat performance and economy of installation and boat operation. MARINE APPLICATIONS AQUALOY 30 boat shafting is particularly useful in high performance applications where high acceleration and heavy duty operation is expected. Clements Marine can also supply special purpose stainless alloys for specific applications on request.

Marine Shafting Alloys TD01 SHAFTING DESIGN ENQUIRIES Technical Dala sheet TD12 should be used for calculation and submission of designs to Clements Marine, enabling us lo consider your requirements allowing for such issues as shaft diameters, propeller loading and bearing spacing. The schematic below can be referred to when calling our office. CORROSION RESISTANCE CORROSION ISSUES. Technical Data sheet TD15 can be consulted regarding issues of marine corrosion generally, and specifically in relation to the shafting alloys. AQUALOY 30 ALLOY MECHANICAL AND CHEMICAL Information is based on data...