TYPICAL ANALYSIS OF SPECIAL HOT WORK ALLOY STEEL.
| Carbon | . | 86 | % |
| Chromium | 3. | 71 | % |
| Phosphorus | . | 023 | % |
| Sulphur | . | 019 | % |
| Manganese | . | 381 | % |
| Silicon | . | 267 | % |
| Iron (by deduction) | 94. | 740 | % |
USES.
An excellent composition for hot work in service for grippers, headers, hot punches, hot shear blades and similar tools. Especially valuable in structural steel and boiler shop work. Rivet sets and bull dies made from a steel of this composition ought to resist breaking and battering.
HEAT TREATMENT.
Very flexible hardening in air, oil or water. If air is used heat to 1675 degrees to 1750 degrees Fahrenheit and place under dry air blast, or stand in cool place. To harden in oil, heat to 1500 degrees to 1550 degrees Fahrenheit and quench in thin oil. To harden in water, heat to 1475 degrees Fahrenheit to 1525 degrees Fahrenheit and quench in cool water. Draw from 250 degrees to 300 degrees Fahrenheit.