HHBNb(Z)hasexcellentweldingperformance,weldappearance,weldingspattersmallerfeatures. Weldingwithoutusinggasorfluxconservation,whichsimplifiestheweldingprocess,weldingmaterialscostsavings. Heapfinecrackswillappearwhenweldingistheresultofthereleaseofstress doesnotaffecttheimpactofminingconditionsinthelownormaluse.