Hobart SubCOR SL 741 description: SubCOR SL 741 is a seamless low-alloy cored wire for welding base materials with a yield strength of up to 80 ksi (550 MPa). Hobart recommends using this wire with the following flux(es): SWX 140, 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").