... ,DNV,CCS,GL,NK,BV,LR,RINA,KR... Application: welding sheet metal Submerged Arc welding Wire EM121,20kg plastic spool packing(for only Φ2 ... 4,250kg wiid drum packing 5,Applicable for the sumberged arc automatic weld of the boiler and pressure container made of low ... ≤0.20≤0.30≥330415~550≥22≥27(-20°C) Submerged Arc welding Wire