Lead-free steel for machine structural use with excellent...

Details Lead-free steel for machine structural use with excellent... Lead-free steel for machine structural use with excellent...

2007-03-27

2007-03-27

Wyszomierski, George (Department: 1742)

Alloys or metallic compositions

Ferrous

Lead, bismuth, selenium, tellurium or calcium containing

C420S087000, C175S425000

Reexamination Certificate

active

10182714

ABSTRACT:
A lead-free steel for machine structural use with excellent machinability and low strength anisotropy, which does not contain Pb and is equal to or higher than a conventional Pb-containing free cutting steel in properties, is provided. This steel includes, on the weight basis, C: 0.10 to 0.65%; Si: 0.03 to 1.00%; Mn: 0.30 to 2.50%; S: 0.03 to 0.35%; Cr: 0.1 to 2.0%; Al: less than 0.010%; Ca: 0.0005 to 0.020%; Mg: 0.0003 to 0.020%; O: less than 20 ppm; and the balance being Fe and inevitable impurities.

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