Invention Grant
- Patent Title: Heavy wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes
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Application No.: US14248116Application Date: 2014-04-08
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Publication No.: US09644248B2Publication Date: 2017-05-09
- Inventor: Ettore Anelli , Emanuele Paravicini Bagliani , Stefano Fare
- Applicant: Dalmine S.p.A.
- Applicant Address: IT Dalmine
- Assignee: DALMINE S.P.A.
- Current Assignee: DALMINE S.P.A.
- Current Assignee Address: IT Dalmine
- Agency: Knobbe Martens Olson and Bear LLP
- Priority: EP13162722 20130408; EP14163358 20140403
- Main IPC: C21D8/10
- IPC: C21D8/10 ; C21D9/08 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/42 ; C22C38/44 ; C22C38/48 ; C22C38/50 ; F16L9/02 ; C22C38/00
Abstract:
Disclosed herein are embodiments of a seamless quenched and tempered steel pipe having a wall thickness (WT) higher than or equal to 35 mm and lower than or equal to 80 mm. Embodiments of the steel pipe can comprise C, Mn, Cr, Ni, Mo, Al, Ca, N, Nb, Ti, Zr, and Ta. Further, for some embodiments of the steel pipe wherein, defining a first parameter P1=50×C+Cr+10×Mo+70×V, the chemical composition can satisfy a first condition P1≦8.0.
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