Plate Stock, Stainless Steel, 17-4, Sheet, 12 in Overall Length, Length Tolerance +0.125/-0.000 in, 12 in Overall Width, Width Tolerance +0.125/-0.000 in, 0.188 in Thickness, Thickness Tolerance +0.045/-0.01 in, Fabrication Hot Rolled, Heat Treatment Annealed, Heat Treatable Yes, Mechanical Finish Mill, Yield Strength 160,000 psi, Tensile Strength 185,000 psi, Brinell Hardness 326, Rockwell Hardness C35, Includes Material Certificate Yes, Standards AMS 5604, ASTM A693-03, UNS S17400