MARTENSITIC STAINLESS STEEL PIPE

A martensitic stainless steel pipe that has a yield strength of 110 ksi or more and has excellent machinability is provided. A martensitic stainless steel pipe according to the present disclosure consists of, in mass%, C: less than 0.030%, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less, S:...

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Bibliographische Detailangaben
Hauptverfasser:	KANKI, Kyohei, MATSUO, Daisuke, NISHIMURA, Toshiya
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A martensitic stainless steel pipe that has a yield strength of 110 ksi or more and has excellent machinability is provided. A martensitic stainless steel pipe according to the present disclosure consists of, in mass%, C: less than 0.030%, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less, S: 0.0010 to 0.0050%, Cr: 10.00 to 14.00%, Ni: 5.00 to 7.50%, Mo: 1.10 to 3.50%, Cu: 1.00 to 3.50%, Al: 0.005 to 0.050%, N: 0.0030 to 0.0500%, V: 0.01 to 0.30%, Ti: 0.020 to 0.150%, Co: 0.01 to 0.50%, Ca: 0.0010 to 0.0050%, and the balance: Fe and impurities. The yield strength is 758 MPa or more. A number density of Ca sulfides having an equivalent circular diameter of 1.0 µm or more is 3 /mm2 or more.