HS221 silicon bronze welding wire 
 National Standard: HSCuSi 
 American Welding Society Standards: ERCuSi-A 
 German Standard: SG-CuSi3 
 Product Description: 
 Silicon bronze contains about 3% and a small amount of silicon manganese, the alloy is mainly for copper, zinc alloy and steel themselves and between these materials welding. 

 Chemical composition (% weight) 
 Manganese Iron Copper Lead Zinc Tin amount of silicon impurity 
 Cu Zn Sn Mn Fe Pb Si Total others 
 1.0 1.0 0.01 1.5 0.50 0.50 0.02 2.8-4.0