AISI T5 high speed tool steel manufacturers and suppliers, supplied in round bar,square bar,flat bar,plate,sheet and wire.AISI T5 Tool Steel is one of tungsten type high speed tool steel according to ASTM/A600 standard. Compared with AISI T4，it has higher cobalt with 8%,which makes higher temperature performance and better toughness.It also has high abrasion resistance and good cutting performance.The surface hardness can reach 68-70HRC after quenched.
1.Supply Form & Size & Tolerance
| Round bar | ||||
| Diameter | 1-16mm | 10-50mm | 50-180mm | 180-300mm |
| Process | Cold Drawn | Hot Rolled | Hot Forged | Free Forging |
| Flat bar | ||||
| Thickness | 1-2.5mm | 1.5-20mm | 20-300mm | |
| Width | Max 800mm | Max 800mm | Max 800mm | |
| Process | Cold Drawn | Hot Rolled | Hot Forged | |
Remark:Tolerance can be customized as per requests
2.Chemical Composition
| Standard | Grade | C | Si | Mn | P | S | Cr | Mo | V | w | Co |
| ASTM A600 | T5 | 0.75-0.85 | 0.20-0.40 | 0.20-0.40 | 0.03 | 0.03 | 3.75-5.00 | 0.50-1.25 | 1.80-2.40 | 17.5-19.0 | 7.00-9.50 |
| DIN ISO 4957 | 1.3265 | 0.72-0.80 | 0.45 | 0.4 | 0.03 | 0.03 | 3.80-4.50 | 0.50-0.80 | 1.40-1.70 | 17.5-18.50 | 9.00-10.00 |
| GB/T 9943 | W18Cr4V2Co8 | 0.75-0.85 | 0.20-0.40 | 0.20-0.40 | 0.03 | 0.03 | 3.75-5.00 | 0.50-1.25 | 1.80-2.40 | 17.50-19.00 | 7.00-9.50 |
| JIS G4403 | SKH4 | 0.73-0.83 | 0.45 | 0.4 | 0.03 | 0.03 | 3.80-4.50 | – | 1.00-1.50 | 17.00-19.00 | 9.00-11.00 |
3.Physical Property
| Density ,g/cm3 | 8.75 |
| Specific heat ,J/kg.K | 42 |
| Thermal conductivity,W/mK | 34 |
| Modulus of elasticity,kN/mm2 | 424 |
| Thermal expansion,20-100 ºC,untreated | 11.2 x 10^ -6 /ºC |
4. Mechanical Property
| Hardness, Rockwell C (Quenched at 1277°C ,Tempered at 552°C) | 63-65 HRC |
| Poisson's ratio | 0.27-0.30 |
| Elastic modulus | 190-210 GPa |
5.Forging
Pre heat the AISI T5 with two steps.First,heat slowly and uniformly to 650-750°C with a rate not exceeding 220°C per hour,second,heat more quickly to the forging temperature of 1000-1150°C.Re-heating is necessary when temperature below 950°C. Slow cooling in furnace after forging.
6.Annealing
Annealing must be performed after hot working and before re-hardening.Heat the temperature to 820 to 870°C with a rate not exceeding 220°C per hour.Controlled slow cooling in furnace at 10 to 20°C per hour to approximately 550°C, followed by cooling in still air. Hardness after annealing 285Brinell, maximum.
7.Stress Relieving
It is recommended to stress relieve after machining and prior to hardening to minimise the possibility of distortion.Heat in a neutral atmosphere to the temperature of 600 to 650°C, and soak for approximately two hours,followed by slow cooling in the furnace.
8.Hardening
Preheat T5 tool steel slowly to the temperature of 820-870°C,then heat uniformly to Austenitizing Temperature,for salt bath 1277°C,for Controlled atmosphere furnace 1288°C,followed by salt bath or thermal quenching or warm bath approx. 550°C.
9.Tempering
Tempering should be carried out immediately after quenching. Heat slowly and uniformly to the tempering temperature 550-590°C,soak well not less than 2 hours(one hour per 25mm of total thickness).Triple tempering is recommended,hardness after tempering is Min 63HRC.
| Tempering Temperature | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 |
| Hardness (HRC) | 64 | 64.5 | 63 | 62.5 | 62 | 62 | 62.5 | 63.6 | 64.8 | 66 | 64 | 60 |
10.Application
AISI T5 high speed steel is good for machining high strength steel,high temperature alloy,titanium alloys,casting alloy materials and other difficult-to-machine materials,and also is widely used in cutting tools,broaches,punches, turning blades,milling cutter,drill,and etc.
