EP0010755B2 - Utilisation d'un acier de construction à grain fin contenant du manganèse et du nickel - Google Patents

Utilisation d'un acier de construction à grain fin contenant du manganèse et du nickel Download PDF

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Publication number
EP0010755B2
EP0010755B2 EP79104222A EP79104222A EP0010755B2 EP 0010755 B2 EP0010755 B2 EP 0010755B2 EP 79104222 A EP79104222 A EP 79104222A EP 79104222 A EP79104222 A EP 79104222A EP 0010755 B2 EP0010755 B2 EP 0010755B2
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EP
European Patent Office
Prior art keywords
steel
nickel
manganese
copper
steels
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
EP79104222A
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German (de)
English (en)
Other versions
EP0010755A1 (fr
EP0010755B1 (fr
Inventor
Constantin M. Dr. Ing. Vlad
Klaus Dipl.-Ing. Hulka
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.)
Stahlwerke Pein Salzgitter AG
Preussag Stahl AG
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Stahlwerke Pein Salzgitter AG
Preussag Stahl AG
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Publication date
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Application filed by Stahlwerke Pein Salzgitter AG, Preussag Stahl AG filed Critical Stahlwerke Pein Salzgitter AG
Priority to AT79104222T priority Critical patent/ATE4228T1/de
Publication of EP0010755A1 publication Critical patent/EP0010755A1/fr
Publication of EP0010755B1 publication Critical patent/EP0010755B1/fr
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    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium

Definitions

  • the invention relates to the use of a manganese-nickel fine-grained structural steel with 0.04 to 0.09% carbon, 1.2 to 1.8% manganese, 0.1 to 0.4% silicon, 0.03 to 0, 08% niobium, 0.5 to 1.5% nickel, up to 0.25% aluminum, up to 0.015% sulfur and optionally 0.2 to 0.4% copper, remainder iron including impurities due to melting.
  • An alloy steel of the type mentioned above is known from German Offenlegungsschrift 2407338; it contains 0.01 to 0.10% carbon, 0.5 to 2% manganese, 0.1 to 0.9% silicon, 0.001 to 0.10% niobium, 0.01 to 0.3% aluminum and 1, 4 to 3.5% nickel.
  • This steel has a certain cold strength if it has been hot rolled in a controlled manner depending on the nickel content.
  • hot rolling controlled as a function of the respective nickel content proves to be difficult and, in particular, complex in practice.
  • the cold toughness of this steel is not sufficient to use the steel at temperatures such as that of liquid methane and, in particular, liquid ethylene.
  • German Offenlegungsschrift 2461 087 that copper in a steel with 0.05 to 0.20% carbon, 0.01 to 0.8% silicon, 0.5 to 1.6% manganese, below 0 , 03% phosphorus, 0.002 to 0.02% sulfur and 0.2 to 0.8% copper, the rest iron and iron companion increases the strength, but affects the hot formability.
  • the copper should increase the resistance to hydrogen or suppress the formation of hydrogen cracks, provided that the steel contains no or at most 0.6% nickel; however, this is only at the expense of hot workability.
  • This steel is suitable as a material for oil or gas pipes.
  • German published patent application 2157 305 is a low-alloy steel with 0.04 to 0.09% carbon, 0.1 to 0.9% silicon, 1.7 to 2.2% manganese, each with 1.0% copper or Nikkel, 0.3 to 1.5% copper and nickel and 0.01 to 0.10% niobium are known, which has a limited cold toughness with an additional vanadium content of 0.05% and a zirconium content of 0.06%. None is known about the resistance of the steel to hydrogen cracks.
  • the invention is based on the object of proposing an alloy steel for use at temperatures down to -120 ° C. which can be welded, has a high yield strength at room temperature and cold toughness and resistance to hydrogen cracks and is accordingly particularly suitable as a material for welded parts, which, like pipes and containers, serve for the transport and storage of liquid gases even in the presence of hydrogen sulfide and water.
  • the steel is said to be resistant to liquid ethylene and to withstand temperatures down to -120 ° C.
  • the solution to this problem is to use an uncontrolled hot-rolled steel of the type mentioned in the normalized state as the material for parts which come into contact with liquefied petroleum gas at temperatures down to -120 ° C. After such a heat treatment, the steel has a room temperature yield point of at least 420 Nm 2 and a transition temperature of the impact strength of 51 mm 2 transverse to the rolling direction of at least -120 ° C. and a notched impact strength of at least 280 mm 2 at room temperature.
  • the steel contains 0.2 to 0.4% copper, then its crack resistance is in the presence of Traces of hydrogen sulfide particularly high. This is of considerable importance insofar as liquefied gases often contain traces of hydrogen sulfide which, when water is present at the same time, has a corrosive effect and in particular leads to hydrogen-induced cracks.
  • the low carbon content of the steel results in good welding behavior on the one hand and promotes notched impact strength on the other.
  • the excellent properties of the proposed steel are explained in the synergistic interaction of nikkel, niobium and manganese.
  • the steel is preferably annealed normally until the core temperature is 30 to 50 ° C above the AC 3 point and then annealed for 2 to 4 minutes at 2 to 4 minutes at 550 to 650 ° C, in particular at 630 ° C, in order to improve the toughness adjust.
  • FIG. 3 show the superiority of the steel to be used according to the invention (Erf.St.) with 0.61% nickel in comparison to conventional standard steels, whereby it should be noted that the steel to be used according to the invention is cross-samples, in the other cases, with one exception, are longitudinal samples.
  • the comparative steels, each with an index number, are described in the following publications:
  • the steels examined also each had a yield strength of at least 420 N / mm 2 and a notched impact strength of at least 280 J / cm 2 at room temperature.
  • FIGS. 4 and 5 show that the crack sensitivity in the presence of hydrogen sulfide is particularly low at copper contents above about 0.02%, so that the proposed steel is particularly suitable for the transport and storage of contaminated liquid gas.
  • the high resistance to cracking is due to the fact that a weak acid develops during operation under the influence of hydrogen sulfide and water.
  • the resulting hydrogen ions migrate into the material and are molecularly separated at the grain boundaries. In conventional steels, this results in pressures that lead to cracking.
  • part of the copper dissolves in the acid.
  • the resulting ions migrate to the material surface through ion exchange and form a molecular protective layer made of copper. This copper layer acts as a barrier against further penetration of the hydrogen and explains this 4 apparent high hydrogen resistance of the steel to be used according to the invention.

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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)
  • Laminated Bodies (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Catalysts (AREA)

Claims (4)

1. Utilisation d'un acier de construction à grain fin à teneur en manganèse et en nickel avec 0,04 à 0,09% de carbone, 1,2 à 1,8% de manganèse, 0,1 à 0,4% de silicium, 0,03 à 0,08% de niobium, 0,5 à 1,5% de nickel, jusqu'à 0,25% d'aluminium, jusqu' à 0,015% de soufre et, facultativement, 0,2 à 0,4% de cuivre, le reste étant du fer y compris les impuretés inhérentes à la fusion, qui a subi un laminage à chaud de manière non contrôlée et un recuit de normalisation, en tant que matériau pour des pièces qui, tels des tubes et réservoirs, entrent en contact avec un gaz liquide à des températures jusqu'à -120°C.
2. Utilisation selon la revendication 1, caractérisé en ce que l'on utilise un acier qui a en outre subi un revenu.
3. Utilisation selon la revendication 1 ou 2, caractérisé en ce que l'on utilise un acier qui, pendant 2 à 4 minutes, a subi un recuit de normalisation à une température à coeur de 30 à 50°C supérieure au point AC3.
4. Utilisation selon la revendication 2 ou 4, caractérisé en ce que l'on utilise un acier qui, pendant 2 à 4 minutes par mm d'épaisseur du matériau, a subi un revenu à une température de 550 à 650°C.
EP79104222A 1978-11-02 1979-10-31 Utilisation d'un acier de construction à grain fin contenant du manganèse et du nickel Expired EP0010755B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104222T ATE4228T1 (de) 1978-11-02 1979-10-31 Verwendung von mangan-nickel-feinkornbaustahl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2847506A DE2847506C2 (de) 1978-11-02 1978-11-02 Verwendung eines kaltzähen Mangan-Nickel-Feinkornbaustahls
DE2847506 1978-11-02

Publications (3)

Publication Number Publication Date
EP0010755A1 EP0010755A1 (fr) 1980-05-14
EP0010755B1 EP0010755B1 (fr) 1983-07-20
EP0010755B2 true EP0010755B2 (fr) 1986-08-06

Family

ID=6053669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104222A Expired EP0010755B2 (fr) 1978-11-02 1979-10-31 Utilisation d'un acier de construction à grain fin contenant du manganèse et du nickel

Country Status (5)

Country Link
EP (1) EP0010755B2 (fr)
AT (1) ATE4228T1 (fr)
CA (1) CA1149647A (fr)
DE (1) DE2847506C2 (fr)
NO (1) NO151506C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262281B1 (fr) * 1986-09-25 1989-05-10 MANNESMANN Aktiengesellschaft Procédé de production de tubes pour utilisation à températures jusqu'à moins 40 degrés Celsius
HU205393B (en) * 1988-06-22 1992-04-28 Gyoergy Vizi Process for producing corner element of steel container from hot rolled steel plate

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB974028A (en) * 1963-02-13 1964-11-04 South Durham Steel & Iron Comp Improvements in and relating to low alloy steels
DE1758507B1 (de) * 1968-06-15 1970-12-10 Thyssen Roehrenwerke Ag Verwendung eines hochfesten manganlegierten Feinkornbaustahls als Werkstoff fuer geschweisste Gegenstaende mit guten Tieftemperatureigenschaften
US3619302A (en) * 1968-11-18 1971-11-09 Yawata Iron & Steel Co Method of heat-treating low temperature tough steel
DE2039910B2 (de) * 1970-08-11 1973-08-02 Nippon Steel Corp , Tokio Waermebehandlungsverfahren fuer einen stahl
JPS5215523B1 (fr) * 1970-11-18 1977-04-30
CA966702A (en) * 1972-05-12 1975-04-29 Reginald N. Shaughnessy Method for the production of high strength notch tough steel
US3834949A (en) * 1973-02-14 1974-09-10 Inland Steel Co Hot rolled flat steel article for cryogenic service and method for producing same
JPS5411774B2 (fr) * 1973-02-15 1979-05-17
GB1436846A (en) * 1973-03-16 1976-05-26 Int Nickel Ltd Steels
DE2461087A1 (de) * 1973-12-28 1975-07-03 Sumitomo Metal Ind Wasserstoffreissfester stahl fuer rohrleitungsrohre
US4138278A (en) * 1976-08-27 1979-02-06 Nippon Steel Corporation Method for producing a steel sheet having remarkably excellent toughness at low temperatures

Also Published As

Publication number Publication date
NO151506B (no) 1985-01-07
DE2847506C2 (de) 1986-04-17
EP0010755A1 (fr) 1980-05-14
CA1149647A (fr) 1983-07-12
NO151506C (no) 1985-04-24
EP0010755B1 (fr) 1983-07-20
NO793516L (no) 1980-05-05
DE2847506A1 (de) 1980-05-14
ATE4228T1 (de) 1983-08-15

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