DE908380C - Use of austenitic steel alloys - Google Patents

Use of austenitic steel alloys

Info

Publication number
DE908380C
DE908380C DEK6428D DEK0006428D DE908380C DE 908380 C DE908380 C DE 908380C DE K6428 D DEK6428 D DE K6428D DE K0006428 D DEK0006428 D DE K0006428D DE 908380 C DE908380 C DE 908380C
Authority
DE
Germany
Prior art keywords
steel alloys
alloys
austenitic steel
austenitic
manganese
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEK6428D
Other languages
German (de)
Inventor
Dr Phil Walter Tofaute
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Original Assignee
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DEK6367D external-priority patent/DE891399C/en
Application filed by Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie filed Critical Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Priority to DEK6428D priority Critical patent/DE908380C/en
Application granted granted Critical
Publication of DE908380C publication Critical patent/DE908380C/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/14Casing shoes for the protection of the bottom of the casing
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Steel (AREA)

Description

Verwendung von austenitischen Stahllegierungen Das Patent 891399# bezieht sich auf die Verwendung austenitischer Stahllegierungen mit höchstens 0,21/o Kohlenstoff, 15 bis 30'10 Chrom, mehr als 3 bis weniger als 5010 Nickel und mehr als o#,2 bis 1,50/9, insbesondere mehr als 0,2 bis 0,5'/o Stickstoff, die außerdem bis zu 41/o Silizium, Molybdän, Kupfer, Titan, Tantal, Niob, Vanadin, Wolfram und/oder Zirkon enthalten können, wobei das Nickel ganz oder teilweise durch Kobalt ersetzt werden 'kann. Diese sich durch große Widerstandsfähigkeit gegen Korrosion auszeichnenden Stähle sind trotz des geringen Nickelgehaltes infolge des Stickstoffzusatzes stabil austenitisch, das heißt nach dem Abschrecken in einem austeriitischen Zustand, der gegen Anlaßbehandlungen bzw. Dauerglühung-en unempfindlich ist, und auch trotz hoher Festigkeit gut tiefziehf ähig. Weiterhin sind sie gut schweißbar und weisen noch weitere günstigere mechanische und technologische Eigenschaften auf als entsprechende st,ickstofffreie und weiche austeniti#s#che Legierungen.Use of austenitic steel alloys The patent 891399 # relates to the use of austenitic steel alloys with at most 0.21 / o carbon, 15 to 30'10 chromium, more than 3 to less than 5010 nickel and more than o #, 2 to 1.50 / 9, in particular more than 0.2 to 0.5% nitrogen, which can also contain up to 41 / o silicon, molybdenum, copper, titanium, tantalum, niobium, vanadium, tungsten and / or zirconium, the nickel can be wholly or partially replaced by cobalt '. These steels, which are characterized by their high resistance to corrosion, are stable austenitic despite their low nickel content as a result of the addition of nitrogen, i.e. after quenching in an austeritic state that is insensitive to tempering or permanent annealing, and can also be deep-drawn despite their high strength. Furthermore, they are easy to weld and have other more favorable mechanical and technological properties than corresponding st, nitrogen-free and soft austenitic alloys.

Es hat sich nun herausgestellt, daß diese Stahllegierungen als Werkstoff für unmagnetische Kappenringe im besonderen Maße geeignet sind. Bisher wurden als Werkstoff für solche Gegenstände austenitische Chrom-Mangan-, Mangan- und Mangan-'-i\-ick,el-Stähl-e verwendet. Diese Legierungen haben jed-och den Nachteil, daß die Streckgrenze tief liegt und daß sie hei ihrer 'Verwendung, als Werkstoff für Kappenringe zur Erhöhung ihrer Streckgrenze kalt verformt werderi müssen. Bei Verwendung der im Patent 8191 399 angegebenen Stahllegierungen werderi diese NachteiIe vermieden. Die augegebenei) Legierungeti sind unmagnetisch wid haben scboii im vergüteten Zustand die erforderliche hohe Streckgren7e. Es wurden z. B. mit einer Legierung, die 0,04 1/o Kohlenstoü, 0,33 0/0 Sil,iziuin, 0,51 0,'o 2vIangan, 22-,7 0/0 Chrom, 4,2 "/0 Nickel und 0,27 0/0 Stickstoff enthielt, nach einer Vergütung durch Uschrecken von iioo' C in Wasser folgende FestigIlleitswerte,erreicht: Streckgrenze ............. 6o,o, kg/mm2 Zugfestigkeit ............. 86,5 kg/mM2 Dehnung (5 - d) # ......... 48V0-Trotz der hohen Streckgrenze 1,zi#iiiieii hifolge der noch vorhanden,-ii hohen Dehnung die Legierungeii noch weiterhin kalt aufgeweitet werden, falls dies erforderlich sein sollte. Es wird daher bei V2rwendung dieser Legierungen als Werkstoff für unmagnetische Kappenringe die erforderliche hohe Zugfestigkeit ]),ei we-sentlich höherer -Streckgrenm# und Dehnun-, ohne oder durch weit geringere Kaltv,erforinung"erreiclit, als sie bei Verwendung der hislier gebräuchlichen Stahlsorten erforderlich ist. It has now been found that these steel alloys are particularly suitable as a material for non-magnetic cap rings. So far, austenitic chromium-manganese, manganese and manganese -'- i \ -ick, el-steel-e have been used as the material for such objects. However, these alloys have the disadvantage that the yield point is low and that, when they are used as material for cap rings, they have to be cold-deformed to increase their yield point. These disadvantages are avoided when the steel alloys specified in patent 8191 399 are used. The given alloys are non-magnetic and in the quenched and tempered condition they have the required high yield ratio. There were z. B. with an alloy containing 0.04 1 / o carbon, 0.33 0/0 sil, iziuin, 0.51 0, 'o 2 manganese, 22-, 7 0/0 chromium, 4.2 "/ 0 nickel and contained 0.27% nitrogen, the following strength values were achieved after quenching 100 ° C in water: Yield point ............. 6o, o, kg / mm2 tensile strength .. ........... 86.5 kg / mM2 elongation (5 - d) # ......... 48V0-Despite the high yield point 1, zi # iiiieii if it is still present, - ii high elongation, the alloy can still be expanded cold if this should be necessary. Therefore, when these alloys are used as a material for non-magnetic cap rings, the required high tensile strength]), much higher elongation and elongation, without or by means of far less cold hardening than is necessary when using the steel grades commonly used in the past.

Claims (1)

PATENTANSPRUCH: Die Verwendung von nach Patent Sgi 399 zu verwendenden Stalillegierungen als Werkstoff für unmagnetische Kappenringe.PATENT CLAIM: The use of stainless steel alloys to be used in accordance with patent SGI 399 as a material for non-magnetic cap rings.
DEK6428D 1940-06-20 1940-07-24 Use of austenitic steel alloys Expired DE908380C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK6428D DE908380C (en) 1940-06-20 1940-07-24 Use of austenitic steel alloys

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEK6367D DE891399C (en) 1940-06-20 1940-06-20 Austenitic steel alloys for objects that are exposed to heat during manufacture or in operation
DEK6428D DE908380C (en) 1940-06-20 1940-07-24 Use of austenitic steel alloys

Publications (1)

Publication Number Publication Date
DE908380C true DE908380C (en) 1954-04-05

Family

ID=34888404

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK6428D Expired DE908380C (en) 1940-06-20 1940-07-24 Use of austenitic steel alloys

Country Status (1)

Country Link
DE (1) DE908380C (en)

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