Free Cutting Steels

The steels for high-speed machining, commonly called free-cutting steels, have been specially designed to be machined by chip removal with high productivity.

They are basically carbon steels with a high content of sulfur  or sulfur and lead

Material
No.
DIN
NORM
SAE
AISI
CHEMICAL COMPOSITION ( %)
C max.SiMnP max.SPb
1,071112120,120,10 – 0,350,75 – 1,100,030,08 – 0,13
1,071511SMn3012130,14max. 0,050,90 – 1,300,110,27 – 0,33
1,071811SMnPb3012L130,14max. 0,050,90 – 1,300,110,27 – 0,330,20 – 0,35
1,073611SMn3712150,14max. 0,051,00 – 1,500,110,34 – 0,40
1,073711SMnPb3712L140,14max. 0,051,00 – 1,500,110,34 – 0,400,20 – 0,35