Steel for making very large pipe molds

Details Steel for making very large pipe molds Steel for making very large pipe molds

C - Chemistry, Metallurgy

22

C

C22C 38/46 (2006.01) B22D 13/10 (2006.01)

Patent

CA 2110199

A ferritic alloy steel that may be used for making very large pipe molds with high ductility and high toughness for centrifugally casting pipe with an inside diameter that may exceed 40 inches, the steel consisting essentially of from about 0.12% to about 0.18% carbon, about 0.70% to about 0.95% manganese, about 0.008% maximum phosphorous, about 0.008% maximum sulphur, about 0.20% to about 0.35% silicon, about 1.05% to about 1.25% nickel, about 1.85% to about 2.25% chromium, about 0.60% to about 0.75% molybdenum, about 0.03% to about 0.08% vanadium, and balance essentially iron.

Acier allié ferritique pouvant servir à la fabrication de moules d'une grande ductilité et dureté pour très gros tuyaux. Ces tuyaux sont coulés par centrifugation et leur diamètre intérieur peut excéder 40 pouces. L'acier est composé essentiellement d'environ 0,12 % à 0,18 % de carbon, d'environ 0,70 % à 0,95 % de manganèse, d'environ 0,008 % de soufre, d'environ 0,20 % à 0,35 % de silicium, d'environ 1,05 % à 1,25 % de nickel, d'environ 1,85 % à 2,25 % de chrome, d'environ 0,60 % à 0,75 % de molybdène, d'environ 0,03 % à 0,08 % de vanadium; le reste étant principalement du fer.

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