SAE-AISI T2 (T12002) Tungsten High-Speed Steel

SAE-AISI T2 steel is a tool steel. T2 is the designation in both the SAE and AISI systems for this material. T12002 is the UNS number.

The properties of SAE-AISI T2 steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare SAE-AISI T2 steel to: tool steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Annealed T2 Tool Steel Hardened T2 Tool Steel

Mechanical Properties

Elastic (Young's, Tensile) Modulus

200 GPa 30 x 10⁶ psi

Poisson's Ratio

0.29

Shear Modulus

79 GPa 12 x 10⁶ psi

Tensile Strength: Ultimate (UTS)

780 to 2150 MPa 110 to 310 x 10³ psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Melting Completion (Liquidus)

1820 °C 3300 °F

Melting Onset (Solidus)

1760 °C 3200 °F

Specific Heat Capacity

410 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

19 W/m-K 11 BTU/h-ft-°F

Thermal Expansion

12 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

46 % relative

Density

9.3 g/cm³ 580 lb/ft³

Embodied Carbon

11 kg CO₂/kg material

Embodied Energy

170 MJ/kg 71 x 10³ BTU/lb

Embodied Water

98 L/kg 12 gal/lb

Common Calculations

PREN (Pitting Resistance)

Stiffness to Weight: Axial

12 points

Stiffness to Weight: Bending

21 points

Strength to Weight: Axial

23 to 64 points

Strength to Weight: Bending

20 to 40 points

Thermal Diffusivity

4.9 mm²/s

Thermal Shock Resistance

23 to 65 points

Alloy Composition

Iron (Fe)Fe		70.8 to 75.8
Tungsten (W)W		17.5 to 19
Chromium (Cr)Cr		3.8 to 4.5
Vanadium (V)V		1.8 to 2.4
Carbon (C)C		0.8 to 0.9
Molybdenum (Mo)Mo		0 to 1.0
Manganese (Mn)Mn		0.2 to 0.4
Silicon (Si)Si		0.2 to 0.4
Nickel (Ni)Ni		0 to 0.3
Copper (Cu)Cu		0 to 0.25
Phosphorus (P)P		0 to 0.030
Sulfur (S)S		0 to 0.030