Subject: Case Study TG&P Sheffield™ Hardened Alloy Shaft / Spring 2012 SUMMARY Material: 1 Piece 90mm Diameter x 39” Long Sheffield™ #20 TG&P Application: Drive shaft for large material mixer. Medium being mixed was dry plastic powder. This shaft

drove a large mixer-blade head and was powered by a 400hp motor. The bearing failed resulting in a catastrophic unit failure. The Sheffield™ #20 TG&P shaft was severely twisted, but did not fracture (see photo below). Please note the alignment of the two keyways.

Prior To Installation After Bearing Failure

How Our Products Differ: Sheffield™ #20 TG&P Hardened Alloy Shaft Material, lasts longer and stays straighter in

rotary and reciprocating applications. It is engineered to resist fatigue and load type of failures.

Sheffield™ #20 TG&P is made to “CLEAN STEEL PRODUCTION TECHNOLOGY”. Toughness resists fatigue failure and cleanliness builds toughness.

Most in-service shaft failures in heavy industry are “Fatigue” related. “Toughness” is the most effective property that resists fatigue failure. Clean Steel Production Technology builds toughness in shafts.

Bar integrity, (cleanliness, grain-shape, size, and structure), is the predominant means of achieving toughness. Homogenizing the grain structure, removing inclusions, removing retained stress, eliminating pipe, seams, cracks and voids builds toughness. In addition, a bright surface finish retards surface initiated failure and resists the detrimental effects of surface corrosion. Reduction ratios employed by the mill affect the homogeneity of the material and minimize

internal voids. We provide steels off-the-shelf that already provide our customers with the refinement practices most often required by risk management assessment, following a catastrophic failure.