... welding. 2.Product usage:ships,locomotive,chemical engineering,food,sports equipment,mould,furniture,vessel,container,tec.3. Shielding gas:Argon,Helium ... grey black after anodic processER5554180-240low Mg content5052,5454casting Use chemical equipment with a temperature above 65ER5654210-270medium Mg content5154castingmedium intensity,good ...