FR2192185A1 - Weldable heat-resistant alloy steels - resisting automobile waste gases, and contg aluminium, chromium, titanium, opt zirconium - Google Patents

Weldable heat-resistant alloy steels - resisting automobile waste gases, and contg aluminium, chromium, titanium, opt zirconium

Info

Publication number
FR2192185A1
FR2192185A1 FR7324920A FR7324920A FR2192185A1 FR 2192185 A1 FR2192185 A1 FR 2192185A1 FR 7324920 A FR7324920 A FR 7324920A FR 7324920 A FR7324920 A FR 7324920A FR 2192185 A1 FR2192185 A1 FR 2192185A1
Authority
FR
France
Prior art keywords
contg
waste gases
opt
zirconium
chromium
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.)
Withdrawn
Application number
FR7324920A
Other languages
French (fr)
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 JP6756672A external-priority patent/JPS5110805B2/ja
Priority claimed from JP3388173A external-priority patent/JPS49121721A/ja
Priority claimed from JP3388073A external-priority patent/JPS565816B2/ja
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of FR2192185A1 publication Critical patent/FR2192185A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

Oxidn., -and heat-resistant Fe-Cr-Al alloy steel, having good weldability and machinability without abnormal oxidn. during repeated heating in automobile waste gases above 1000 degrees C, useful for gas purification system combining catalytic converter and a waste gas cycle, contains =0.02%C, =0.15% Si, =0.3% Mn, 0.4-1% Ti, 15-25% Cr, 2-3.5% Al, bal. Fe; provided Cr- and Al-contents lie within range defined by lines connecting points corresp. to (i) 16.5% Cr, 3.3% Al, (ii) 25; % Cr, 2.9% Al, (iii) 25% Cr, 2.2% Al, in a given diagram obtd. by plotting Al % against Cr %. Content of Cr, Al and Ti is such as to allow the prodn. of a 1 mu alpha-Al2O3 film at alloy surface, acting as protection against attack by halogens. Incorporation of 0.05-0.4% Zr widens Al- and Cr-content range to area defined by lines connecting points (i') 15.5% Cr, 3.6% Al, (ii') 25% Cr, 3.2% Al and (iii') 25.% Cr, 2.0% Al. Alloy pref. contains 0.05-0.2% Nb and 0.02% N, and surface is pref. free from halogen-contg. substances.
FR7324920A 1972-07-07 1973-07-06 Weldable heat-resistant alloy steels - resisting automobile waste gases, and contg aluminium, chromium, titanium, opt zirconium Withdrawn FR2192185A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6756672A JPS5110805B2 (en) 1972-07-07 1972-07-07
JP3388173A JPS49121721A (en) 1973-03-24 1973-03-24
JP3388073A JPS565816B2 (en) 1973-03-24 1973-03-24

Publications (1)

Publication Number Publication Date
FR2192185A1 true FR2192185A1 (en) 1974-02-08

Family

ID=27288238

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7324920A Withdrawn FR2192185A1 (en) 1972-07-07 1973-07-06 Weldable heat-resistant alloy steels - resisting automobile waste gases, and contg aluminium, chromium, titanium, opt zirconium

Country Status (2)

Country Link
DE (1) DE2334462A1 (en)
FR (1) FR2192185A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391054A1 (en) * 1989-04-06 1990-10-10 Krupp Stahl AG Use of a heat-resistant steel for corrosion-resistant components

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2876627B2 (en) * 1989-07-11 1999-03-31 大同特殊鋼株式会社 Stainless steel with excellent corrosion resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391054A1 (en) * 1989-04-06 1990-10-10 Krupp Stahl AG Use of a heat-resistant steel for corrosion-resistant components

Also Published As

Publication number Publication date
DE2334462A1 (en) 1974-01-24

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Legal Events

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