Global Patent Index - EP 0709481 B1

EP 0709481 B1 2000-01-26 - Low alloy steel for the manufacture of moulds for plastic materials or for rubber articles

Title (en)

Low alloy steel for the manufacture of moulds for plastic materials or for rubber articles

Title (de)

Niedrig legierter Stahl zur Herstellung von Spritzformen für plastische Werkstoffe oder für Gegenstände aus Gummi

Title (fr)

Acier faiblement allié pour la fabrication de moules pour matières plastiques ou pour caoutchouc

Publication

EP 0709481 B1 (FR)

Application

EP 95402230 A

Priority

FR 9413029 A

Abstract (en)

[origin: EP0709481A1] The low alloy steel comprises (wt.%): 0.24-0.35 C; 1-2.5 Mn; 0.3-2.5 Cr; 0.2-1.6 W; 0.1-0.8 (Mo+W/2); 0-25 Ni; 0-0.3 V; 0-0.5 Si; 0.002-0.005 B; 0.005-0.1 Al; 0-0.1 Ti; 0-0.02 P; and 0-2 Cu. There may also be present less than 0.1% of at least one of the following: Nb, Zr, S, Se, Te, Bi, Ca, Sb, Pb, In and rare earth elements. The remainder is Fe plus possible impurities. The compsn. also satisfies the following equations: U = 409(%C) + 19.3(%Cr + %Mo + %W/2) + %V) + 29.4(%Si) + 10(%Mn) + 7.2(%Ni) < 200 and R = 3.82(%C) + 9.79(%Si) + 3.34(%Mn) + 11.94(%P) + 2.39(%Ni) + 1.43(%Cr) + 1.43(%Mo + W/2) < 11.14.

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

C22C 38/32; C22C 38/54

IPC 8 full level (invention and additional information)

C22C 38/00 (2006.01); C22C 38/32 (2006.01); C22C 38/54 (2006.01); C22C 38/60 (2006.01)

CPC (invention and additional information)

C22C 38/32 (2013.01); C22C 38/54 (2013.01)

Designated contracting state (EPC)

AT BE DE ES GB IT PT SE

EPO simple patent family

EP 0709481 A1 19960501; EP 0709481 B1 20000126; AT 189269 T 20000215; CA 2161740 A1 19960501; CA 2161740 C 20050614; CN 1049700 C 20000223; CN 1129744 A 19960828; DE 69514755 D1 20000302; DE 69514755 T2 20000810; ES 2144113 T3 20000601; FR 2726287 A1 19960503; FR 2726287 B1 19970103; JP 3845805 B2 20061115; JP H08209298 A 19960813; PT 709481 E 20000630; TW 420721 B 20010201; US 5645794 A 19970708

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- Opponent name: AKTIENGESELLSCHAFT DER DILLINGER HUETTENWERKE

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