Global Patent Index - EP 0882807 B1

EP 0882807 B1 2000-11-22 - Heat resistant, nickel free constructional steel and process for making plate from it

Title (en)

Heat resistant, nickel free constructional steel and process for making plate from it

Title (de)

Feuerresistente nickelfreie Stähle für den Stahlbau und Verfahren zur Herstellung von Grobblech daraus

Title (fr)

Acier de construction réfractaire, exempte de nickel et procédé pour la fabrication de tôles épaisses en cet acier

Publication

EP 0882807 B1 (DE)

Application

EP 98110023 A

Priority

DE 19724051 A

Abstract (en)

[origin: EP0882807A1] A fire resistant nickel-free steel, which has a yield point (Re) of greater than 280 N/mm<2> and a yield point ratio (Re/Rm) of 0.4-0.6 and which is used especially in thick plate form for steel construction, has a composition (wt.%) comprising: 0.06-0.20 carbon; 0.20-0.30 silicon; 0.50-1.60 manganese; 0.020-0.045 soluble aluminium; 0.50-0.90 chromium; 0.10-0.40 molybdenum; 0.01-0.05 vanadium; and balance iron and impurities. Also claimed is the production of a 50 mm thick or less plate of the above steel by casting the steel to slabs by stationary or continuous casting, reheating to 1050-1200 degrees C, hot rolling to a finish temperature of 920-1000 degrees C, air cooling and normalising at 880-950 degrees C for NOTGREATER 30 minutes.

IPC 1-7 (main, further and additional classification)

C22C 38/04; C21D 1/28; C21D 8/02; C22C 38/22; C22C 38/24

IPC 8 full level (invention and additional information)

C21D 1/28 (2006.01); C21D 8/02 (2006.01); C22C 38/04 (2006.01); C22C 38/22 (2006.01)

CPC (invention and additional information)

C21D 1/28 (2013.01); C21D 8/0226 (2013.01); C22C 38/04 (2013.01); C22C 38/22 (2013.01)

Designated contracting state (EPC)

AT BE DE DK ES FI FR GB IT LU NL SE

EPO simple patent family

EP 0882807 A1 19981209; EP 0882807 B1 20001122; AT 197723 T 20001215; DE 19724051 C1 19990311; DK 0882807 T3 20010102; ES 2152726 T3 20010201

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