ASTM T6 High Speed tool steel also belongs to tungsten type high speed steels in ASTM A600 specification. ASTM T6 Tool Steel is similar to T5 Tool Steel, but T-6 steel has more Cobalt and Tungsten content than T5 tool steels, and T6 tool steel is better in high temperature hardness and wear resistance.
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1.AISI T6 Tool Steel Supply Range
T6 Steel Round Bar: diameter 2mm – 800mm
T6 Steels Flat: thickness 2-400mm x width 10-600mm
T6 Tool Steel Plate: thickness 2-600mm x width 200-610mm
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
2.Standard of AISI T6 Tool Steel High Speed
| Country | USA |
| Standard | ASTM A600 |
| Grades | T6 / T12006 |
3.ASTM High Speed T6 Steel Chemical Composition Properties
| ASTM A600 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
| T6 / T12006 | 0.75 | 0.85 | 0.20 | 0.40 | 0.03 | 0.03 | 0.20 | 0.40 | 4.00 | 4.75 | 1.50 | 2.10 | 0.40 | 1.00 | 18.50 | 21.00 | 11.00 | 13.00 |
4.AISI T6 Tool Steels Mechanical Properties
T6 Tool Steel Physical Properties
- Density (lb / cu. in.) 0.322
- Specific Gravity 8.89
- Melting Point (Deg F) 2620
- Modulus of Elasticity Tension 29
Mechanical Properties of T-6 Tool Steel
| Proof strength
Rp0.2 |
Tensile strength
Rm (MPa) |
Impact energy
KV (J) |
Elongation at fracture
A (%) |
Reduction in cross section on fracture
Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
| 633 (≥) | 366 (≥) | 43 | 23 | 41 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 134 |
5.Forging of ASTM T6 High Speed Steel
Forge at 1162℃ down to 1010℃. Do not forge below 982℃.
6.ASTM T6 High Speed Steel Heat Treatment
Preheat TT steels to 815℃ and then heat rapidly to 1273 – 1287℃ and hold at temperature for 2 to 5 minutes. Quench in air, salt bath, or oil.
Annealing of Steel T-6
Anneal at 885℃ and slow cool in the furnace at a rate less than 4℃ per hour.
Tempering of T6 Steel
Temper T6 at 537℃ to 593℃ for Rockwell C of 65 to 60.
7.Applications of AISI T6 High Speed Steel
AISI T6 high speed steels are mainly used for cutting applications such as drills, milling processes, cutting tools, reamers, etc.
Some typical applications of T6 tool steel are as below:
- Turning and slotting tools
- Broaching tools
- Reamers
- Threading dies
- Twist drills
- Tapes
- Broaches etc
Together with ASTM T6 tool steel, we could also supply you T-1 steels, T2 steel, T4 tool steel, T5 steels, T15 steel, M2 & M42 steel etc. You are welcome to send your requests to us anytime. We are a better choice for you.