Free cutting steel

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Properties These are steels for high speed machining, commonly called free cutting steel and are used where high degrees of machining are required as they minimize tool wear. These steels contain sulphur; ensuring the fragmentation of the burr, prolonging tool life, lead; which reduces friction between the tool and the metal and tellurium and bismuth which further intensify these aspects.
In general free cutting steel is supplied without any prior heat treatment however some of them can be tempered, normalized or annealed before finishing.

Execution bars
Profile
Range (mm)
Tolerances
DrawnRound
Hexagon
Square
Special

Piatto
2,5÷80
4÷90
5÷120
20x10÷120x80
a richiesta
ISA h9-h10-h11
MilledSquare
Flat
110÷160
132x60÷160x120
ISA h11
Peeled - rolledRound20÷150ISA h9-h10-h11
GroundRound4÷100ISA h6-h7-h8-h9
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Designation
(*= di normale reperibilità)
Germany
DIN
France
AFNOR
Spain
UNE
UK
B.S.
Russia
GOST
USA
AISI-SAE
India
IS
China
GB
10S201.072110S2010F2F212110S20A12 ~1108Y12
10SPb20 1.0722 10SPb20 10PbF2F.2122AS14 11L08 Y12Pb 
11SMn30 *1.0715 9SMn28 S250F.2111230M07 1215 11C10S25 Y15
11SMnPb30 *1.0718 9SMnPb28 S250PbF.2112AS14 ~ 12L15 Y15Pb 
11SMn37 *1.0736 9SMn36 S300F.21131214 
11SMnPb37 *1.0737 9SMnPb36 S300PbF.211412L14 
35SPb20 1.0756 35SPb20 35SPb20F.213235SPb20 
36SMn14 1.0764 36SMn1436SMn1436SMn141137 ~40Mn15S12 
36SMnPb14 *1.0765 36SMnPb14 35MF6Pb36SMnPb14AS35G2 ~ 
38SMn281076038SMn28
44SMn28 *1.0762 44SMn28 44SMn2844SMn28226M44 A40G 1144 44C15S24 Y45Mn
44SMn28Pb1.076344SMn28Pb
46S20 *1.0727 45S20 45MF4F.213346S20 1146 ~ 40C10S18 Y45
46SPb20 1.0757 45SPb20 46SPb2046SPb2046SPb20 AS45G2 ~ 11L46 ~ 
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