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T-15 High Speed Tool Steel
T-15 is an air or oil hardening tool steel that has exceptional wear resistance. It resists softening at high operating temperatures.
Analysis:
| C | CO | CR | MN | MO | NI | P | S | SI | V | W |
|---|
| 1.50 - 1.60 | 4.75 - 5.25 | 3.75 - 5.00 | 0.15 - 0.40 | 1.00 Max. | 0.15 - 0.40 | 4.50 - 5.25 | 11.75 - 13.00 |
Size Availability:
Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • StandardApplications:
| Boring Tools | Broaches | Cold Heading Punches |
| Header Die Inserts | Hobs | Lathe Tools |
| Milling Cutters | Planer Tools | Reamers |
| Shaper Tools | Shaving Tools | Taps |
Designations:
AISI T15 High Speed Tool Steel - USDIN 1.3202 - Germany
UNI 130505 KU - Italy
B.S. BT 15 - US
ASTM A600 - US
FED QQ-T-590 - US
UNS T12001 - US
UNS T12015 - US
| Treatment | Temperature Range | Cooling/Quenching | Notes |
|---|---|---|---|
| Forging | 1700-2100° F | Slow. | Cool slowly in dry sand or in other insulating media. |
| Annealing | 1600-1650° F | Cool slowly at a rate of 35° F per hour to 1000° F. | For best results, insulating media is desirable. Hold at temperature for 2 hours. |
| Stress Relieving | 1100-1300° F | Cool slowly | Stress relieve after rough machining |
| Preheating | 1450-1500° F | Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible. | |
| Hardening | 2250-2300° F (furnace) 2220-2275° F (salt bath) | Quench in air or warm oil. To minimize quenching strains, quench in salt at 1000° F | For maximum wear resistance, harden at 2300° F. For maximum toughness and high hardness, harden at 2200° F. |
| Tempering | (See Chart) | Double tempering is recommended. The usual tempering time is 2+2 hours. Recommended temperature is 1000-1075° F for cutting tools. 1100-1200° F for shock tools |