Precision Ground Fla t Stock 496 Oil Hardening Precision Ground Fla t Stock STANDARD 495 Oil Hardening Precision Ground Fla t Stock OVERSIZE • Stock is dimensionally stable – use it for the most intricate work • Deep hardening characteristics and fine grain structure • Machines freely – fully spheroidized, annealed • Full length identification – eliminates confusion with other steels • Starrett uses its own ground flat stock and die stock for many of its fine precision tool parts NOTE: Lengths, widths and thicknesses other than listed can also be quoted by request Specifica tions Furnished in 18" and 36" lengths, ground straight and parallel. Hardening It is recommended that stock be heated uniformly to 1450º-1500º F and quenched in oil. Temperature of the quenching oil should be 120º-140º F for best results. Do not quench in water because this is an oil hardening steel. Tempering For maximum toughness, a tempering time of one hour at temperature is recommended. Use chart for selecting desired Rockwell C hardness and corresponding tempering temperature. The following may also be used as a guide depending on type of work. Cutting Tools • 300º-350º F (Light Straw) Solid Punches and Dies • 400º-450º F (Straw) Spring Temper • 750º-800º F (Blue) Nominal Analysis (AISI 01) Carbon ............................................................... .90 Chromium .......................................................... .50 Manganese ........................................................ 1.20 Tungsten ............................................................ .50 Vanadium ........................................................... .20 Size Temperature Quench Rockwell C All Sizes 1450º-1500º F Oil 63-65 200 30 40 50 60 400 600 800 1000 1200 ROCKWELL C HARDNESS ONE HOUR TEMPERING RECOMMENDED TEMPERING TEMPERATURE °F 552 F la t S tock and D rill R od