DE971370C - Steel alloys for items resistant to stress corrosion - Google Patents

Steel alloys for items resistant to stress corrosion

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Publication number
DE971370C
DE971370C DEK3836D DEK0003836D DE971370C DE 971370 C DE971370 C DE 971370C DE K3836 D DEK3836 D DE K3836D DE K0003836 D DEK0003836 D DE K0003836D DE 971370 C DE971370 C DE 971370C
Authority
DE
Germany
Prior art keywords
resistant
stress corrosion
steel alloys
items
copper
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
DEK3836D
Other languages
German (de)
Inventor
Dr Phil Carl Carius
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
Application filed by Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie filed Critical Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Priority to DEK3836D priority Critical patent/DE971370C/en
Application granted granted Critical
Publication of DE971370C publication Critical patent/DE971370C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Description

(WiGBl. S. 175)(WiGBl. P. 175)

AUSGEGEBEN AM 15. JANUAR 1959ISSUED JANUARY 15, 1959

K3836VIji8dK3836VIji8d

Esseneat

(Ges. v. 15. 7. 1951)(Ges. Of July 15, 1951)

Es ist bereits bekannt, Stahllegierungen mit bis zu o,4°/o> insbesondere bis zu 0,2% Kohlenstoff, 12 bis 40%, insbesondere 17 bis 24% Chrom, 6 bis 40%, insbesondere 7 bis 20% Nickel, 1 bis 4%, insbesondere 2 bis 4°/0 Kupfer, Rest Eisen, als Werkstoff für solche Gegenstände, die gegen Spannungskorrosion beständig sein müssen, zu verwenden. Die auf dem Kupferzusatz beruhende Widerstandsfähigkeit gegen diese Korrosionsart ist auch dann vorhanden, wenn die Stahllegierungen noch weitere Legierungsbestandteile, wie z. B. Molybdän, Wolfram, Titan, Vanadin, Tantal, Niob, Zirkon in Mengen bis zu 6°/0 oder Phosphor, Arsen, Sauerstoff, Stickstoff, Cer in Mengen bis zu 1 °/0 einzeln oder gemischt, insbesondere 1,5 bis 5% Molybdän, enthalten. Ferner kann bei den vorgenannten Legierungen das Nickel ganz oder teilweise durch Mangan oder Kobalt einzeln oder gemischt ersetzt sein.It is already known to use steel alloys with up to 0.4%, in particular up to 0.2% carbon, 12 to 40%, in particular 17 to 24% chromium, 6 to 40%, in particular 7 to 20% nickel, 1 to 4%, particularly 2 to 4 ° / 0 copper, balance iron, to be used as material for such articles which must be resistant to stress corrosion. The resistance to this type of corrosion based on the addition of copper is also present if the steel alloys contain other alloy components, such as e.g. B. molybdenum, tungsten, titanium, vanadium, tantalum, niobium, zirconium in amounts up to 6 ° / 0 or phosphorus, arsenic, oxygen, nitrogen, cerium in amounts up to 1 ° / 0 individually or mixed, in particular 1.5 to Contains 5% molybdenum. Furthermore, in the case of the aforementioned alloys, the nickel can be completely or partially replaced by manganese or cobalt, either individually or as a mixture.

Es hat sich nun überraschenderweise herausgestellt, daß die Wirkung des Kupfers in bezug auf die Wider- ao Standsfähigkeit solcher Stahllegierungen gegen Spannungskorrosion noch größer ist, wenn man diesesIt has now been found, surprisingly, that the effect of copper in relation to the cons Resilience of such steel alloys against stress corrosion is even greater if you have this

809 705/29809 705/29

MetalldenbetreffendenLegierungen nur inMengenvon 0,3 bis weniger als i°/0 zusetzt. Diese Feststellung ergibt sich beispielsweise aus dem Verhalten von Bügelproben aus 2 mm starken Blechstreifen in einer auf 900C erhitzten Lösung aus 60 Teilen Calciumchlorid, 40 Teilen Wasser und 1 Teil Quecksilberchlorid, die bekanntlich als ein außerordentlich stark wirkendes Schnellprüfmittel gilt, in den erfahrungsgemäß selbst Stähle, die in den meisten praktisch vorkommenden Fällen als beständig gegen Spannungskorrosion anzusehen sind, schnell rissig werden. So zeigten Bügelproben aus einer bereits vorgeschlagenen Stahllegierung mit etwa 0,06 °/0 Kohlenstoff, 18% Chrom, 8% Nickel und 1,54% Kupfer in dem vorerwähnten Schnellprüfmittel nach 18 Tagen beginnende Rißbildung, während bei Bügelproben aus einer entsprechenden, jedoch kupferfreien Legierung sogar schon nach 2 Tagen Rißbildung eintrat.MetalldenbetreffendenLegierungen inMengenvon only 0.3 to less than I ° / 0 added. This finding arises, for example, from the behavior of ironing samples made of 2 mm thick sheet metal strips in a solution heated to 90 0 C of 60 parts of calcium chloride, 40 parts of water and 1 part of mercury chloride, which is known to be an extremely powerful rapid test agent, in the experience itself Steels, which in most practical cases are to be regarded as resistant to stress corrosion, crack quickly. Thus showed strap samples from a previously proposed steel alloy having about 0.06 ° / 0 carbon, 18% chromium, 8% nickel and 1.54% copper in the aforementioned Schnellprüfmittel after 18 days incipient cracking, while copper-free at shackle samples from a corresponding, but Alloy already cracked after 2 days.

Demgegenüber waren Bügelproben, die aus einer Stahllegierung mit etwa 0,06 °/0 Kohlenstoff, i8°/0 Chrom, 8% Nickel und 0,53 % Kupfer hergestellt waren, in dem genannten Schnellprüfmittel selbst nach 35 Tagen noch rißfrei.In contrast, were bracket samples which were made from a steel alloy with about 0.06 ° / 0 carbon, i8 ° / 0 chromium, 8% nickel and 0.53% copper, in said Schnellprüfmittel even after 35 days still free of cracks.

Claims (1)

PATENTANSPRUCH: 2jPATENT CLAIM: 2 j Verwendung von Stahllegierungen, bestehend aus bis zu 0,4, insbesondere 0,2 °/0 Kohlenstoff, 12 bis 40%, insbesondere 17 bis 24% Chrom, 6 bis 40%, insbesondere 7 bis 20% Nickel, 0,3 bis weniger als 1 °/0 Kupfer, Rest Eisen, als Werkstoff für solche Gegenstände, die gegen Spannungskorrosion beständig sein müssen. Use of steel alloys consisting of up to 0.4, in particular 0.2 ° / 0 carbon, 12 to 40%, in particular 17 to 24% chromium, 6 to 40%, in particular 7 to 20% nickel, 0.3 to less than 1 ° / 0 copper, balance iron, as a material for such articles, which must be resistant to stress corrosion. In Betracht gezogene Druckschriften:Considered publications: Deutsche Patentschrift Nr. 688 936; deutsche Patentanmeldung K 146890 VI/i8d;German Patent No. 688,936; German patent application K 146890 VI / i8d; Houdremont, »Sonderstahlkunde«, 1935, S. 476 bis 488;Houdremont, " Sonderstahlkunde ", 1935, pp. 476 to 488; Stahl und Eisen, 1939, S. 800; 1940 S. 619; Korrosion und Metallschutz, 1937, S. 184 bis 186;Stahl und Eisen, 1939, p. 800; 1940 p. 619; Korrosion und Metallschutz, 1937, pp. 184 to 186; Kröhnke-Masing, Die Korrosion metallischer Werkstoffe, Bd. II, 1938, S. 800Kröhnke-Masing, The corrosion of metallic materials, Vol. II, 1938, p. 800 © 809 705/29 1.59© 809 705/29 1.59
DEK3836D 1941-11-06 1941-11-06 Steel alloys for items resistant to stress corrosion Expired DE971370C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK3836D DE971370C (en) 1941-11-06 1941-11-06 Steel alloys for items resistant to stress corrosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK3836D DE971370C (en) 1941-11-06 1941-11-06 Steel alloys for items resistant to stress corrosion

Publications (1)

Publication Number Publication Date
DE971370C true DE971370C (en) 1959-01-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEK3836D Expired DE971370C (en) 1941-11-06 1941-11-06 Steel alloys for items resistant to stress corrosion

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DE (1) DE971370C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3445056A1 (en) * 1983-12-13 1985-06-13 Carpenter Technology Corp., Reading, Pa. AUSTENITIC, STAINLESS STEEL ALLOY AND ITEMS MADE FROM THIS

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE688936C (en) * 1937-05-28 1940-03-06 Fried Krupp Akt Ges Bandage loops

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE688936C (en) * 1937-05-28 1940-03-06 Fried Krupp Akt Ges Bandage loops

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3445056A1 (en) * 1983-12-13 1985-06-13 Carpenter Technology Corp., Reading, Pa. AUSTENITIC, STAINLESS STEEL ALLOY AND ITEMS MADE FROM THIS

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