Title (en)

Martensitic free cutting stainless steel

Title (de)

Martensitischer rostfreier Automatenstahl

Title (fr)

Acier de décolletage inoxydable martensitique

Publication

EP 1918408 A3 20101027 (EN)

Application

EP 07019360 A 20071002

Priority

• JP 2006271360 A 20061003
• JP 2007174797 A 20070703

Abstract (en)

[origin: EP1918408A2] The present invention relates to a martensitic free cutting stainless steel, comprising, by weight percent: C: 0.10 to 1.20 %, Si: 0.10 to 2.00 %, Mn: 0.80 to 2.00 %, S: 0.10 to 0.30 %, Cr: 10.5 to 18.0 %, Pb: 0.03 to 0.30 %, Te: 0.01 to 0.10 %, B: 0.0005 to 0.010 %, and O: 0.005 to 0.030 %, with the remainder being substantially Fe and inevitable impurities; contents of P and N are: P: 0.005 to 0.10 %, and N: ‰¤ 0.050 %; wherein respective formulae of 3.0 ‰¤ [Mn]/[S] ‰¤ 15.0, 0.10 ‰¤ [Te]/[S], and 10 ‰¤ [S]/[O] ‰¤ 40 are satisfied; and wherein a sulfide having a circle equivalent diameter of 2.0 µm or more and an aspect ratio of 10 or less is present in a total amount of 0.50 to 10 % by area ratio.

IPC 8 full level

C22C 38/34 (2006.01); C21D 6/00 (2006.01); C22C 38/00 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/54 (2006.01); C22C 38/60 (2006.01)

CPC (source: EP US)

C21D 6/002 (2013.01 - EP US); C21D 9/18 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/20 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/54 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US); C22C 38/60 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)

Citation (search report)

• [X] JP 2004131764 A 20040430 - SANYO SPECIAL STEEL CO LTD
• [I] US 2002170638 A1 20021121 - SHIMIZU TETSUYA [JP], et al
• [I] JP 2001164340 A 20010619 - SANYO SPECIAL STEEL CO LTD
• [I] US 4434006 A 19840228 - KATO TETSUO [JP], et al
• [A] JP 2003183729 A 20030703 - SANYO SPECIAL STEEL CO LTD
• [A] JP 2000282185 A 20001010 - DAIDO STEEL CO LTD
• [A] JP 2006097039 A 20060413 - SANYO SPECIAL STEEL CO LTD
• [A] JP S6283452 A 19870416 - DAIDO STEEL CO LTD
• [A] JP 2001098352 A 20010410 - SANYO SPECIAL STEEL CO LTD
• [A] JP 2005002381 A 20050106 - AICHI STEEL WORKS LTD
• [A] JP 2001011581 A 20010116 - SANYO SPECIAL STEEL CO LTD
• [AD] JP 2002038241 A 20020206 - SANYO SPECIAL STEEL CO LTD

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

DOCDB simple family (publication)

EP 1918408 A2 20080507; EP 1918408 A3 20101027; EP 1918408 B1 20141126; CN 101158011 A 20080409; CN 101158011 B 20120926; JP 2008111186 A 20080515; JP 5135918 B2 20130206; US 2008089804 A1 20080417

DOCDB simple family (application)

EP 07019360 A 20071002; CN 200710164219 A 20070930; JP 2007174797 A 20070703; US 90552207 A 20071002