Parts for fluid

Details Parts for fluid Parts for fluid

C - Chemistry, Metallurgy

22

C

C22C 38/44 (2006.01) C22C 38/00 (2006.01) C22C 38/42 (2006.01) C22C 38/46 (2006.01) F16K 7/12 (2006.01) F16K 25/00 (2006.01) F16K 27/00 (2006.01) F16K 27/02 (2006.01) F16L 19/08 (2006.01) F16L 58/00 (2006.01)

Patent

CA 2491967

A part (1) for a fluid having a plurality of constituting members (2, 3, 4, 5 and 6), wherein a specific metal member thereof (for example, a bolt (5)) having a surface exposed to the exterior thereof comprises an alloy which has a chemical composition in wt %: C: 0.001 to 0.01 %, Si: 5 % or less, Mn: 2 % or less, P: 0.03 % or less, S: 100 ppm or less, O: 50 ppm or less, Cr: 18 to 25 %, Ni: 15 to 25 %, Mo: 4.5 to 7.0 %, Cu: 0.5 to 3.0 %, N: 0.1 to 0.3 %, and the balance: substantially Fe and inevitable impurities.

L'invention concerne une pièce (1) pour un fluide ayant une pluralité d'éléments constitutifs (2, 3, 4, 5 et 6), dans laquelle un élément métallique spécifique de celle-ci (par exemple un boulon (5)), présentant une surface exposée à son intérieur, comprend un alliage ayant une composition chimique exprimée en pourcentage en poids: C: 0,001 à 0,01 %, Si: 5 % ou moins, Mn: 2 % ou moins, P: 0,03 % ou moins, S: 100 ppm ou moins, O: 50 ppm ou moins, Cr: 18 à 25 %, Ni: 15 à 25 %, Mo: 4,5 à 7,0 %, Cu: 0,5 à 3,0 %, N: 0,1 à 0,3 %, et le solde est constitué sensiblement de Fe et d'impuretés inévitables.

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