Non-magnetic stainless steel for use at very low temperature...

Details Non-magnetic stainless steel for use at very low temperature... Non-magnetic stainless steel for use at very low temperature...

C - Chemistry, Metallurgy

22

C

C22C 38/58 (2006.01) C22C 38/00 (2006.01) C22C 38/44 (2006.01) G21B 1/00 (2006.01) H05H 1/12 (2006.01)

Patent

CA 2361702

The invention concerns a non-magnetic austenitic stainless steel for use at very low temperature and resistant to neutrons, whereof the chemical composition comprises, by weight: 17 % </= Cr </=19 %; 12 % </= Ni </= 15 %; 2.5 % </=Mo </=4 %; 6 % </= Mn </=8 %; 0.1 % </= N </= 0.3 %; C </= 0.3 %; Si </= 1.5 %; optionally boron in contents not more than 0.005 %; the rest being iron and impurities resulting from preparation. The invention also concerns the use of said steel for manufacture in particular by moulding of a component of a device producing thermonuclear energy, operating at a temperature less than 7K. The invention also concerns the resulting component.

Acier inoxydable austénitique amagnetique pour utilisation à très basse température et résistant aux neutrons, dont la composition chimique comprend, en poids : 17 % <= Cr <=19 %; 12 % <= Ni <= 15 %; 2,5 % <=Mo <=4 %; 6 % <= Mn <=8 %; 0,1 % <= N <= 0,3 %; C <= 0,03 %; Si <= 1,5 %; éventuellement du bore en des teneurs inférieures ou égales à 0,005 %; le reste étant du fer et des impuretés résultant de l'élaboration. Utilisation de l'acier pour la fabrication notamment par moulage d'une pièce d'un dispositif de production d'énergie thermonucléaire, devant travailler à une température inférieure à 7 K. Pièce obtenue.

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