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W-1 Water Hardening Tool Steel
W-1 is a water-hardening tool steel that is easy to machine. Its high carbon content allows it to develop a keen cutting edge. It has a moderate wear resistance.
Analysis:
| C | CO | CR | MN | MO | NI | P | S | SI | V | W |
|---|
| 0.70 - 1.50 | 0.15 Max. | 0.10 - 0.40 | 0.10 Max. | 0.10 - 0.40 | 0.10 Max. | 0.15 Max. |
Size Availability:
Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • StandardApplications:
| Blanking Dies | Cartridge Dies | Circular Cutters |
| Draw Dies | Drifts | Drills |
| Engraving Stamps | Forming Dies | Gauges |
| Jeweler Dies | Knurling Tools | Paper Knives |
| Punches | Reamers | Striking Dies |
| Taps | Threading Dies | Wood Knives |
Designations:
ASTM A686 - USSAE J437 (W108) - US
SAE J437 (W109) - US
SAE J437 (W112) - US
SAE J437 (WhO) - US
SAE J438 (W108) - US
SAE J438 (W109) - US
SAE J438 (W110) - US
SAE J438 (W112) - US
UNS T72301 - US
AISI W1 Tool Steel - US
| Treatment | Temperature Range | Cooling/Quenching | Notes |
|---|---|---|---|
| Forging | 1700-1900° F | In air. | Heat slowly to maximum temperature. Forging should begin as soon as the section is uniformly heated through. |
| Annealing | 1400-1450° F | Cool slowly in the furnace at a maximum rate of 50° F per hours.. | Protect against surface decarburization by pack-annealing. Hold at temperature for 1 hour. |
| Stress Relieving | 1200-1250° F | Cool slowly in air. | Stress relieve after rough machining |
| Preheating | 1200-1250° F | Preheat time in furnace is ¾ Hr. per inch of thickness | |
| Hardening | 1375-1450° F | In water or in a brine solution. | Small tools or parts may be heated in molten lead or in a salt bath. Soak time is 10 minutes per inch of thickness. Minimum of 30 minutes. |
| Tempering | Temper immediately after hardening and quenching. Recommended temperature is 350-550° F. |