Specifications include, but are not limited to: Cutting edge shall be formed from new billet, open hearth carbon steel, conforming to the following chemical composition: Material: To be steel AISI C-1084 quality within the chemistry specifications. Minimum Maximum Carbon Percent 0.80 0.93 Manganese 0.60 0.90 Phosphorus 0.04 Max. Sulfur 0.05 Max. Hardness 250-325 Brinell Material: To be Boron Steel 15B30 quality within the chemistry specification, Through Hardened/Heat Treated Minimum Maximum Carbon Percent 0.28 0.36 Manganese 0.80 1.10 Phosphorus 0.04 Max. Sulfur 0.05 Max. Silicon 0.15 .035 Chrome 0.03 Max. Boron 0.0005 0.008 Hardness 400-477 Brinell Description Blade, scarifier, 7' x 6" x 1/2" Blade, snow plow 12' x 8" x 1/2" Blade, snow plow 6' x 8" x 1/2" Blade, snow plow 6' x 6" x 1/2" Blade, snow plow 11' x 8" x 1/2" Blade, ice, 7' x 6" x 5/8" must be heat treated Blade, grader, 7' x 8" x 1/2" Blade, grader, 7' x 8" x 3/4" must be heat treated Blade, ice, 7' x 8" x 3/4" must be heat treated Blade, grader, 7' x 8" x 3/4" Blade, snow plow, 6' x 8" x 3/4" Blade, snow plow, Wing, 10' Blade, snow plow, Wing, 8' x 8" x 5/8" Blade, snow plow, Wing, 8' x 8" x 1/2"
