PRODUCT INFORMATION Category: Stainless Steel Wire Alloy: WW309LMO Class: ER309LMO Description: This classification is the same as ER309MO except for a lower maximum carbon content (0.03%). The ER309LMO is used in the same type of applications as the ER309MO. In several layer welds, the low carbon ER309LMO is usually needed for the first layer in order to achieve low carbon contents in successive layers with filler metal such as ER316L or ER317L. Chemical Composition C 0.03 max Cr 23.0-25.0 Ni 12.0-14.0 Mn 1.0-2.5 Si 0.30-0.65 P 0.03 max S 0.03 max Mo 2.0-3.0 Cu 0.75 max