Welding work - Import export

Welded and redrawn tube manufacturing employs elements of both the welded and seamless processes. A welded and redrawn tube is welded in a conventional manner but then transferred to our seamless mill, located in the same factory. Here the product is redrawn to achieve a welded and redrawn finish. The objective of redrawing is to achieve homogenisation of the weld following annealing by cold working. This refines the structure of the weld resulting in improvements that include: Better corrosion resistance Improved fatigue life Higher mechanical integrity Please note that we have a minimum order value of £10,000.

Unalloyed Tantalum is supplied to ASTM F560 – R05200 composition limits. Tantalum is selected for its corrosion resistance, thermal conductivity, high melting point, and ability to form a dielectric oxide film. Tantalum is very ductile and can be readily cold formed due to a low work hardening rate. Welding can be accomplished via resistance, TIG, or electron beam methods, with care taken to protect the weld and heat affected zone from air during welding. Because of the potential for hydrogen embrittlement, Tantalum can not be used for extended service in air or other oxidizing atmospheres above 260°C unless a protective inert atmosphere or vacuum is provided. Available Sizes: Tantalum is available from Hamilton Precision Metals as strip product from 0.0005” to 0.035” (0.0127 mm to 0.889 mm) in widths up to 12.0” (304.8 mm). The material conforms to UNS R05200 and meets the requirements of ASTM F560 and ASTM B708.