EP 2518175 B1 20190123 - HIGH-STRENGTH SPRING STEEL
Title (en)
HIGH-STRENGTH SPRING STEEL
Title (de)
HOCHFESTER FEDERSTAHL
Title (fr)
ACIER À RESSORTS À HAUTE RÉSISTANCE
Publication
Application
Priority
- JP 2009291143 A 20091222
- JP 2010073003 W 20101221
Abstract (en)
[origin: EP2518175A1] Provided is a spring steel that contains 0.15-0.40% carbon, 1-3.5% silicon, 0.20-2.0% manganese, 0.05-1.20% chromium, at most 0.030% phosphorus, at most 0.02% sulfur, and at least one of the following: 0.005-0.10% titanium, 0.005-0.05% niobium, and at most 0.25% vanadium. The remainder of said spring steel comprises iron and unavoidable impurities. The carbon equivalent (Ceq 1 ) of the provided spring steel, as calculated by formula (1), is at most 0.55. Ceq 1 = C + 0.108 × Si - 0.067 × Mn + 0.024 × Cr - 0.05 × Ni + 0.074 × V (In the formula (1), each symbol in brackets represents the content (mass%) of the corresponding element.)
IPC 8 full level
C21D 7/06 (2006.01); C21D 9/02 (2006.01); C22C 38/00 (2006.01); C22C 38/38 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 1/02 (2013.01 - EP KR US); C21D 7/06 (2013.01 - KR); C21D 8/065 (2013.01 - EP US); C21D 9/02 (2013.01 - EP KR US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/34 (2013.01 - EP KR US); C22C 38/38 (2013.01 - KR); C22C 38/42 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP US); C22C 38/50 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP US); C21D 7/06 (2013.01 - EP US)
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 2518175 A1 20121031; EP 2518175 A4 20151202; EP 2518175 B1 20190123; BR 112012014178 A2 20160705; CN 102482743 A 20120530; CN 102482743 B 20141224; ES 2709515 T3 20190416; JP 2011149089 A 20110804; JP 2015214754 A 20151203; JP 6027302 B2 20161116; KR 20120084810 A 20120730; US 2012285585 A1 20121115; US 2017022580 A1 20170126; WO 2011078165 A1 20110630
DOCDB simple family (application)
EP 10839395 A 20101221; BR 112012014178 A 20101221; CN 201080039360 A 20101221; ES 10839395 T 20101221; JP 2010073003 W 20101221; JP 2010240097 A 20101026; JP 2015131070 A 20150630; KR 20127016111 A 20101221; US 201013511541 A 20101221; US 201615286065 A 20161005