Comparison of Machinability of Popular Grades of Steel

BS970 1991	BS970 1955	MACHINABILITY INDEX %
230M07	EN1A	100
230M07Pb	EN1A Pb	150
MILD STEEL	MILD STEEL	55
070M20	EN3A/B	55
080M15	EN32B	55
210M15	EN32M	77
080M40	EN8	45
212A42	EN8M	58
070M55	EN9	30
605M36T	EN16T	29
606M36T	EN16MT	38
708/709M40T	EN19T	29
817M40T	EN24T	29

THIS TABLE IS INTENDED AS A GUIDE. MACHINABILITY IS INFLUENCED BY MACHINE AND TOOL TYPES, AND OPERATING CONDITIONS.

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