1381411 False twist tubes METALLWERK PLANSEE AG & CO KG 20 Nov 1972 [9 Dec 1971] 53548/72 Heading D1D A false-twist crimper tube to be driven by two friction discs is wholly or partly made from an alloy with the following compositions:- 43-89% of TiC, 1-45% of Mo 2 C and/or vanadium carbide and 6-30% of a metal of the iron group (iron, nickel, cobalt). The above percentages are by weight and the following substitutions can be made:-Up to 30% of TiC replaced by zirconium carbide and/or hafnium carbide. Up to 50% of Mo 2 C replaced by tungsten carbide or up to 25% by chromium carbide. Up to 40% of iron group metals replaced by chromium, molybdenum or tungsten or up to 15% by titanium, zirconium, hafnium, vanadium or tantalum. The outer surface of the tube base body may be coated with hard carbides, carbonitrides, nitrides or borides. Specification 1363819 is referred to.