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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.

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)

36

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

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

SAE J437: Selection and Heat Treatment of Tool and Die Steels

ASTM A600: Standard Specification for Tool Steel High Speed

Tool Steels, 5th ed., George Roberts et al., 1998

Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016

ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015