Ferritic stainless steel sheet for use in raw material pipe...

Details Ferritic stainless steel sheet for use in raw material pipe... Ferritic stainless steel sheet for use in raw material pipe...

2011-07-26

2011-07-26

Yee, Deborah (Department: 1733)

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

C420S060000, C420S061000, C420S068000, C420S069000, C148S325000, C148S909000

Reexamination Certificate

active

07985372

ABSTRACT:
A ferritic stainless steel sheet for use in raw material pipes for forming bellows pipes has excellent formability. More specifically, the ferritic stainless steel sheet contains 10 % to 25 % by mass of Cr and has a yield stress in the range of 300 to 450 MPa and the product of the yield stress and the uniform elongation properties of at least 5200 (MPa·%). Preferably, the ferritic stainless steel sheet for use in raw material pipes for forming bellows pipes has an average crystal grain size D of 35 μm or less or a surface roughness of 0.40 μm or less as determined by Ra.

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Machine-English translation of Japanese patent 09-125208, Takada Takeshi et al., May 13, 1997.
Ukita, “Berouzu oyobi hurckisiburukan no saikin no seizou gijutu (Recent technique of manufacturing bellows and flexible pipes)”, Sosei to kakou, Jul. 1991, 32,366, pp. 818-824. (Japanese article with 2 pages English Abstract).

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