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Class Information
Number: 420/85
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Lead, bismuth, selenium, tellurium or calcium containing > Processes
Description: Processes of incorporating one or more additional element under subclass 84 into a ferrous alloy.










Sub-classes under this class:

Class Number Class Name Patents
420/86 Adding lead 13


Patents under this class:

Patent Number Title Of Patent Date Issued
8187530 Steel for high-cleanliness spring with excellent fatigue characteristics and high-cleanliness spring May. 29, 2012
7879287 Hot-rolled steel sheet for high-strength electric-resistance welded pipe having sour-gas resistance and excellent weld toughness, and method for manufacturing the same Feb. 1, 2011
7635406 Method for manufacturing a low alloy steel excellent in corrosion resistance Dec. 22, 2009
7338630 Free-cutting steel and fuel injection system component using the same Mar. 4, 2008
6783728 Free-cutting steel for machine structural use having good machinability in cutting by cemented carbide tool Aug. 31, 2004
6511553 Steel for steel excellent in workability and method of deoxidizing same Jan. 28, 2003
6117389 Titanium killed steel sheet and method Sep. 12, 2000
5055018 Clean steel Oct. 8, 1991
4999053 Method of producing an iron-, cobalt- and nickel-base alloy having low contents of sulphur, oxygen and nitrogen Mar. 12, 1991
4978499 Soft steel for machine cutting and method of producing it Dec. 18, 1990
4944798 Method of manufacturing clean steel Jul. 31, 1990
4865805 Low-sulfur, lead-free alloy Sep. 12, 1989
4751047 Method of adding low-melting-point metal to molten steel Jun. 14, 1988
4729787 Method of producing an iron; cobalt and nickel base alloy having low contents of sulphur, oxygen and nitrogen Mar. 8, 1988
4666515 Method for adding bismuth to steel in a ladle May. 19, 1987
4602949 Method and apparatus for adding solid alloying ingredients to molten metal stream Jul. 29, 1986
4326886 Steel for cold forging having good machinability and the method of making the same Apr. 27, 1982
4308056 Method and apparatus for introducing solid substances into liquid metals Dec. 29, 1981
4279646 Free cutting steel containing sulfide inclusion particles with controlled aspect, size and distribution Jul. 21, 1981
4268305 Process for treating liquid steel intended in particular for manufacturing machine wire May. 19, 1981
4247324 Method and apparatus for introducing solid substances into liquid metals Jan. 27, 1981
4244737 Method and alloy for introducing machinability increasing ingredients to steel Jan. 13, 1981
4225343 Addition agent for molten metals Sep. 30, 1980
4213780 Method of introducing calcium and calcium alloys into a vessel of molten metal Jul. 22, 1980
4147533 Process for the production of ferro-magnesium and the like Apr. 3, 1979
4014689 Method of fabricating a contact material for high-power vacuum circuit breakers Mar. 29, 1977
3930842 Method of producing alloys based on calcium, silicon and iron Jan. 6, 1976











 
 
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