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.
General tool room usage with moderate cutting speeds. Excellent lathe, planer, and shaper tools, drills, shear blades (for cold work only) punches, chisels, files and mining tools.