SAE-AISI T5 (T12005) Tungsten High-Speed Steel

SAE-AISI T5 steel is a tool steel. T5 is the designation in both the SAE and AISI systems for this material. T12005 is the UNS number.

The properties of SAE-AISI T5 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 T5 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 T5 Tool Steel Hardened T5 Tool Steel

Mechanical Properties

Elastic (Young's, Tensile) Modulus

210 GPa 30 x 10⁶ psi

Poisson's Ratio

0.29

Shear Modulus

80 GPa 12 x 10⁶ psi

Tensile Strength: Ultimate (UTS)

860 to 2140 MPa 120 to 310 x 10³ psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Melting Completion (Liquidus)

1810 °C 3280 °F

Melting Onset (Solidus)

1750 °C 3180 °F

Specific Heat Capacity

410 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

21 W/m-K 12 BTU/h-ft-°F

Thermal Expansion

11 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

60 % relative

Density

9.4 g/cm³ 590 lb/ft³

Embodied Carbon

11 kg CO₂/kg material

Embodied Energy

170 MJ/kg 75 x 10³ BTU/lb

Embodied Water

140 L/kg 17 gal/lb

Common Calculations

PREN (Pitting Resistance)

Stiffness to Weight: Axial

12 points

Stiffness to Weight: Bending

21 points

Strength to Weight: Axial

25 to 63 points

Strength to Weight: Bending

21 to 39 points

Thermal Diffusivity

5.5 mm²/s

Thermal Shock Resistance

26 to 66 points

Alloy Composition

Iron (Fe)Fe		60.6 to 68.3
Tungsten (W)W		17.5 to 19
Cobalt (Co)Co		7.0 to 9.5
Chromium (Cr)Cr		3.8 to 5.0
Vanadium (V)V		1.8 to 2.4
Molybdenum (Mo)Mo		0.5 to 1.3
Carbon (C)C		0.75 to 0.85
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