Table B - Wear resistance of common steels used in manufacturing machine knives
The relative wear resistance of the steels in this chart is determined by measuring weight losses after specimens were abraded by a rubber wheel and quartzite. The lower the weight loss, the higher the abrasion resistance.In use, not all steels react exactly as shown on the list and the differences in performance are usually greater than the figures would indicate.
Table C - Wear Resistance at Elevated Temperatures
This chart compares the wear resistance of steels and carbide at elevated temperatures. In some operations, such as shearing steel, the material to be cut is heated to 500° to 900° F to avoid edge cracking. Often slabs and blooms are sheared to 1600° or higher. In other operations, the heat developed in use can be high enough to soften the edge of a knife that has only been tempered to 300° to 400° F.
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