Lexicon
T
Tantalum
Chemical element, Ta, density 16.6 g/cm³, melting point: 2,995 +/- 25°C. Greyish white, ductile metal with a high chemical stability at room temperature. Is used in its pure form, or as an alloyed additive, for heavy duty parts. Used with Niobium (Nb) as a stabiliser in chemically resistant steels and as tantalum carbide for use in carbides.
Titanium
Chemical element, Ti, density 4.5 g/cm³ (light metal). Ti, with its alloys, is to be found in apparatus and aeroplane assembly thanks to its firmness, low density and high corrosion resistance. Ti is a much used alloy (stabilises steel and stainless construction steel). In austenitic non rust steel it binds the carbon so preventing its separation. Titanium carbides are found in hard wearing stellite types. Titanium oxide (rutile) is used as a welding additive.
Tool steel
Stainless steel of high durability, high corrosion resistance and high toughness suitable for tool making. It must also be able to adjust to wide ranges of temperature change. Tool steel is characterised as cold forming steel (i.e. non-alloyed or low alloyed for surface work at temperatures of less than 200°C), hot-work steel and high speed steel. DIN 17350.
Tungsten
Chemical element W, density 19.3 g/cm. Grey, robust metal, resistant to chemical attacks at room temperature. W is extremely hard with high temperature strength. It is a valuable alloy for steel as it increases corrosion resistance. With cementite it forms carbide, type M3C and M6C. W is especially good for tool steel, providing a good cutting edge, and for permanent magnets. Because of its hardness it is fated to be a hard metal alloy.
Tungsten carbide
Is one of the most important components of hard metal alloys.
..