Heat slowly in pre-heater to 1700 degrees Fahrenheit. Then rapidly in superheater to 2300 degrees Fahrenheit, taking care not to burn or fuse delicate projections on special tools. Harden either in air blast, or in good clean oil; keeping tool in motion. In all cases merely the _end_ of the tool to white heat. Draw in oil from 400 degrees Fahrenheit to 600 degrees Fahrenheit. TYPICAL ANALYSIS OF DIE STEEL FOR HOT WORK. Carbon .39 % Tungsten 8.41 % Chromium 2.10 % Phosphorus .019% Sulphur .017% Manganese .315% Silicon .234% Iron (by deduction) 88.515% USES. Hot shear blades, hot punches, header and gripper dies; used in bolt and rivet making. Also excellent for compression sets and in general for all hot work. HEAT TREATMENT. Will stand high hardening heats, similar to high speed steel, 1700 degrees Fahrenheit and then 2300 degrees Fahrenheit. Harden either in air or oil. Keep away from water. Draw to 500 degrees Fahrenheit. TYPICAL ANALYSIS OF SPECIAL ALLOY STEEL. Carbon .78 % Vanadium .29 % Phosphorus .014% Sulphur .016% Manganese .324% Silicon .296% Iron (by deduction) 98.28 % USES. Specially useful in tools subject to shock, such as hand and pneumatic chisels, boilermakers caulking tools and rivet sets. Also for cold upsetting dies, cold punches, shear blades and stamping dies. A special grade of this steel makes excellent taps. HEAT TREATMENT. Heat slowly to a low red, about 1400 degrees Fahrenheit, or if low carbon content to 1500 degrees Fahrenheit; being very careful not to over-heat. Quench in good clean tempered water; keeping tool constantly in motion. Draw from 250 degrees Fahrenheit to 400 degrees Fahrenheit. TYPICAL ANALYSIS OF FAST FINISHING SEMI-HIGH SPEED. Carbon 1.28 % Tungsten 3.56 % Phosphorus .021% Sulphur .019% Manganese .316% Silicon .271% Iron (by deduction) 94.533% USES. Do not confuse the High Speed, although excellent for turning chilled cast iron, clean finishing cuts. Especially adapted for taps and reamers, as well as for tools for brass, bronze, aluminum, copper and chilled roll turning. HEAT TREATMENT. Heat slowly to full bright red, 1425 degrees Fahrenheit to 1500 degrees Fahrenheit. Quench in luke warm water. Keep tool constantly in motion. Draw to not over 300 degrees Fahrenheit. TYPICAL ANALYSIS OF SIMPLE CARBON TOOL STEEL. Carbon 1.12 % Phosphorus .009% Sulphur .011% Manganese .254% Silicon .213% Iron (by deduction) 98.393% USES.