Tool Steel Plate, Brinell Hardness 200 BHN, Heat Treatable Heat Treatable, Heat Treatment Air-Hardened, Includes Material Certificate Material Certificate with Lot Number, Length Tolerance +0.125 in/+0.25 in, Material Tool Steel, Material Grade A2, Mechanical Finish Precision Ground, Overall Length 18 in, Overall Width 7 in, Rockwell Hardness 94 HRB, Shape Plate, Standards ASTM A681, SAE J437, System of Measurement Inch, Tensile Strength 100,000 psi, Thickness 0.5 in