不锈钢焊丝品名类别AWS型号化学成分（名义值）CSiMnPmax***axCrNiMo不锈钢焊丝19.9.L308L≤0.0250.41.80.0250.015201019.9.LSi308LSi≤0.0250.91.80.0250.0152010.519.9.Nb3470.030.41.30.0250.01519.59.519.9.NbSi347Si0.040.91.20.0250.01519.5)