T-1 is an air or oil hardening tool steel that is an excellent cutting tool material. It has a good combination of toughness and red hardness and is relatively easy to harden.
T-1 is an air or oil hardening tool steel that is an excellent cutting tool material. It has a good combination of toughness and red hardness and is relatively easy to harden.
| C | CO | CR | MN | MO | NI | P | S | SI | V | W |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.65 – 0.80 | 3.75 – 4.50 | 0.10 – 0.40 | 0.20 – 0.40 | 0.90 – 1.30 | 17.25 – 18.75 |
Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • Standard
| Broaches | Drills | Hobs |
| Knurling Tools | Lathe Tools | Milling Cutters |
| Nut Piercers | Planer Tools | Reamers |
| Shaving Tools | Taps | Thread Cutting Tools |
AISI T1 High Speed Tool Steel-US
AFNOR 18-04-01-France
DIN 1.3355-Germany
UNI X 75 W 18 KU-Italy
JIS SKH2-Japan
B.S. BT 1-United Kingdom
ASTM A600-US
FED QQ-T-590-US
SAE J437-US
SAE J438-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 | 1500-1550° F | Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible. | |
| Hardening | 2325-2375° F (furnace) 2275-2350° 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 2375° F. For maximum toughness and high hardness, harden at 2275° 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 |