New Hobart Wires Offer Robust Mechanical Properties

Hobart has introduced a new gas-shielded flux-cored wire — FabCO® 91K2-M — to accompany its reformulated FabCO 91K2-C wire. Both wires provide robust mechanical properties when welding within a wide range of heat inputs. They are ideal for single or multi-pass, all-position welding on offshore, shipbuilding, heavy equipment and structural fabrication applications.  

“These new wires provide operators with the versatility to work within a wider range of welding parameters without sacrificing quality or mechanical properties,” says Derick Railling, product manager, Critical Welds, Hobart. “They also offer excellent impact toughness to reduce the risk of cracking in critical applications.” 

The FabCO 91K2-C wire is classified to American Welding Society (AWS) A5.29 Specification for Low-Alloy Steel Electrodes for Flux-Cored Arc Welding as an E91T1-K2C J H4 wire for use with 100% COshielding gas. The FabCO 91K2-M wire is classified to the same specification as an E91T1-K2M J H4 wire for use with 75 to 80% argon/balance CO2 shielding gas mixtures.  

Both wires feature an H4 designation, indicating they produce a weld deposit with a very low diffusible hydrogen content, which is desirable when welding higher-strength steels. Both wires also feature a “J” designation that indicates enhanced low temperature toughness requirements. However, FabCO 91K2-C and FabCO 91K2M have been developed to exceed classification requirements for test temperature and absorbed energy; users can typically expect good toughness at temperatures as low as -76° F.  

The two wires offer a fast-freezing slag that helps produce flat weld contours, even when welding out of position, and they have low spatter levels to reduce post-weld cleanup. Easy slag removal minimizes the opportunity for inclusions in multi-pass welds, along with the associated downtime and cost for rework. A stable arc transfer results in smooth weld beads with uniform fusion.  

About Hobart Brothers LLC 

Hobart Brothers LLC, headquartered in Troy, Ohio, is a leading manufacturer of the innovative Hobart® brand of filler metals, and is a wholly owned subsidiary of Illinois Tool Works, Inc. The ITW Welding brand portfolio also includes Miller® branded welding and cutting equipment.

For more information, visit the Hobart Brothers LLC website at, call 1-800-424-1543, fax 1-800-541-6607, email or write Hobart Brothers, 101 Trade Square East, Troy, OH 45373. 


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