Specifications include, but are not limited to: 2.1 Steel. The blades shall be fabricated from flat hot rolled carbon steel meeting the requirements of either ASTM A576 or ASTM A575 with the range of Grades SAE 1020 or equal.; 2.2 Tungsten Carbide Inserts. The inserts shall be a high shock WC Grade of tungsten carbide.; 2.2.1 The inserts shall meet Virgin Tungsten Carbide quality specifications and shall meet the following requirements.; 2.2.1.1 Face Insert Characteristics (for dual underbody carbide tipped snowplow blades only): Cobalt Content, percent 19.0 – 21.0; Density, g/cm3 (ASTM B 311) 13.25 - 13.65; Hardness (ASTM B 294, Rockwell A Scale) 83.5 - 85.0; 2.2.1.2 Single or Center Insert Characteristics (for both single carbide tipped and dual underbody carbide tipped snowplow blades): Cobalt Content, percent 10.5 – 12.5; Density, g/cm3 (ASTM B 311) 14.1 - 14.6; Hardness (ASTM B 294, Rockwell A Scale) 87.5 – 90.5; 2.2.2.1 Face Insert Dimensions: Height, inch 0.745 ± 0.005; Width, inch 0.310 ± 0.005; Length, inch 2.000 ± 0.005
