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Influence of steel family (type) on machinability

Stainless steels are often regarded as 'difficult to machine' and classed a single group of steels, based on experience with the most common austenitic types.

Free machining stainless steels grades

The traditional 'free machining' stainless steel grades have been based on sulphur (S) additions in the UK or alternatively, selenium (Se) additions, which have been favoured in the United States.

Speeds and feeds for drilling and reaming stainless steels

Traditionally high speed steel (HSS) tools have been used for drilling and reaming, but carbide tipped tools are also used for specialised jobs or long production runs.

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