EP 3309272 A4 20181024 - FREE-CUTTING STEEL
Title (en)
FREE-CUTTING STEEL
Title (de)
AUTOMATENSTAHL
Title (fr)
ACIER DE DÉCOLLETAGE
Publication
Application
Priority
- JP 2015117795 A 20150610
- JP 2016067188 W 20160609
Abstract (en)
[origin: EP3309272A1] A free-cutting steel is provided that is excellent in machinability (surface roughness, tool life, chip treatability) and rusting characteristics. The free-cutting steel of this invention has a chemical composition that contains, in mass%, C: 0.005 to 0.150%, Si: less than 0.010%, Mn: 1.02 to 2.00%, P: 0.010 to 0.200%, S: 0.350 to 0.600%, Pb: 0.010 to 0.100%, N: 0.004 to 0.015%, O: 0.0080 to 0.0250%, Al: 0 to 0.003%, one or more types of element selected from a group consisting of Ca, Mg and Zr: 0 to 0.0005% in total, and B: 0 to 0.0200%, with the balance being Fe and impurities, the chemical composition satisfying Formula (1): Mn / S ¥ 2.90 where, the content (mass%) of a corresponding element is substituted for each symbol of an element in Formula (1).
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP)
C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/004 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/14 (2013.01); C22C 38/60 (2013.01)
Citation (search report)
- [X] WO 2014125770 A1 20140821 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [I] EP 2096186 A1 20090902 - NIPPON STEEL ENGINEERING CORP [JP]
- [I] JP H07252588 A 19951003 - NIPPON STEEL CORP
- See references of WO 2016199843A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3309272 A1 20180418; EP 3309272 A4 20181024; JP 6489215 B2 20190327; JP WO2016199843 A1 20180412; TW 201708572 A 20170301; TW I609092 B 20171221; WO 2016199843 A1 20161215
DOCDB simple family (application)
EP 16807549 A 20160609; JP 2016067188 W 20160609; JP 2017523691 A 20160609; TW 105118421 A 20160613