- freecutting steel
- steels which have had additions made to improve machinability. The most common additives are sulphur and lead, other elements used include tellurium, selenium and bismuth.
Mechanics glossary. 2013.
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steel — generally defined as a metallic product whose principal element is iron and where the carbon content is not more than 2%. (The presence of large quantities of carbide forming elements may modify the upper limit of the carbon content.) acid steel… … Mechanics glossary
sulphur — generally regarded as an impurity in steel as it can have detrimental effects on strength, ductility and weldability as well as producing hot and cold shortness. Its content in most steels is limited to a maximum of 0.050%. Sulphur is beneficial… … Mechanics glossary