Metal coated steel strip

Abstract

A steel strip that has a coating of an Al—Zn—Si alloy that contains 0.3-10 wt. % Mg and 0.005-0.2 wt. % V.

1 . A metal strip that has a coating of an Al—Zn—Si alloy that contains 0.3-10 wt. % Mg and 0.005-0.2 wt. % V. 
     
     
         2 . The metal strip defined in  claim 1  wherein the coating alloy is an Al—Zn—Si—Mg alloy that comprises the following ranges in % by weight of the elements Al, Zn, Si, and Mg:
 Al: 40 to 60% 
 Zn: 30 to 60% 
 Si: 0.3 to 3% 
 Mg: 0.3 to 10% 
 
     
     
         3 . The metal strip defined in  claim 1  where the coating alloy is an Al—Zn—Si—Mg alloy that comprises the following ranges in % by weight of the elements Al, Zn, Si, and Mg:
 Al: 45 to 60% 
 Zn: 35 to 50% 
 Si: 1.2 to 2.5% 
 Mg 1.0 to 3.0%. 
 
     
     
         4 . The metal strip defined in  claim 1  wherein the alloy coating contains less than 0.15 wt. % V. 
     
     
         5 . The metal strip defined in  claim 1  wherein the alloy coating contains less than 0.1 wt. % V. 
     
     
         6 . The metal strip defined in  claim 1  wherein the alloy coating contains at least 0.01 wt. % V. 
     
     
         7 . The metal strip defined in  claim 1  wherein the alloy coating contains at least 0.03 wt. % V. 
     
     
         8 . The metal strip defined in  claim 1  wherein the alloy coating contains other elements present as unavoidable impurities and/or as deliberate alloy additions. 
     
     
         9 . The metal strip defined in  claim 1  wherein the alloy coating is a single layer. 
     
     
         10 . A cold formed end-use product comprising the metal strip defined in  claim 1 .