EP 2208802 B1 20111221 - Lead-free free-cutting aluminium brass alloy and its manufacturing method
Title (en)
Lead-free free-cutting aluminium brass alloy and its manufacturing method
Title (de)
Aluminium enthaltende, bleifreie Automatenmessinglegierung und deren Herstellungsverfahren
Title (fr)
Alliage de décolletage en laiton sans plomb comprenant de l'aluminium et son procédé de fabrication
Publication
Application
Priority
- CN 200810188263 A 20081223
- US 64351309 A 20091221
Abstract (en)
[origin: EP2208802A1] The present invention provides a lead-free free-cutting aluminum brass alloy and its manufacturing method. The alloy comprises: 57.0ˆ¼63.0 wt% Cu, 0.3ˆ¼0.7 wt% Al, 0.1ˆ¼0.5 wt% Bi, 0.2ˆ¼0.4 wt% Sn and the balance being Zn and unavoidable impurities, or: 57.0ˆ¼63.0 wt% Cu, 0.3ˆ¼0.7 wt% Al, 0.1ˆ¼0.5 wt% Bi, 0.2ˆ¼0.4 wt% Sn, 0.1ˆ¼0.5 wt% Si, 0.01ˆ¼0.15 wt% P, at least two elements selected from the group of 0.01-0.15 wt% Mg, 0.0016-0.0020 wt% B, and 0.001-0.05 wt% rare earth elements and the balance being Zn and unavoidable impurities. The inventive alloy has excellent castability, weldability, cuttability and corrosion resistance. It is suitable for low pressure die casting, gravity casting, horizontal continuous casting, forging and extrusion. Its metal material cost is lower than bismuth brass. It is particularly applicable for components used in drinking water supply systems and other structural components. It is a new environmentally-friendly free-cutting aluminum brass alloy.
IPC 8 full level
CPC (source: EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
EP 2208802 A1 20100721; EP 2208802 B1 20111221; CA 2688994 A1 20100322; CA 2688994 C 20111004; PL 2208802 T3 20120731
DOCDB simple family (application)
EP 09180653 A 20091223; CA 2688994 A 20091222; PL 09180653 T 20091223