Hobart SubCOR SL P1 description: SubCOR SL P1 is a seamless low-alloy cored wire with a nominal 0.5% molybdenum content for submerged arc welding steels having a similar composition. Hobart recommends using this wire with the following flux(es): SWX 150. In an effort to best serve the packaging needs and requirements of our customers globally, this product has part numbers exclusive to customers in North America (part numbers ending in "H"), and others exclusive to customers outside of North America (part numbers ending in "0").