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SAE-AISI D2 (T30402) Chromium Cold-Work Steel

SAE-AISI D2 steel is a tool steel. D2 is the designation in both the SAE and AISI systems for this material. T30402 is the UNS number. It can have the highest ductility among the tool steels in the database.

The properties of SAE-AISI D2 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 D2 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

190 GPa 28 x 106 psi

Elongation at Break

5.0 to 16 %

Fatigue Strength

310 to 860 MPa 45 to 120 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

75 GPa 11 x 106 psi

Shear Strength

460 to 1160 MPa 67 to 170 x 103 psi

Tensile Strength: Ultimate (UTS)

760 to 2000 MPa 110 to 290 x 103 psi

Tensile Strength: Yield (Proof)

470 to 1510 MPa 68 to 220 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Melting Completion (Liquidus)

1440 °C 2620 °F

Melting Onset (Solidus)

1390 °C 2540 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

31 W/m-K 18 BTU/h-ft-°F

Thermal Expansion

11 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

4.3 % IACS

Electrical Conductivity: Equal Weight (Specific)

5.1 % IACS

Otherwise Unclassified Properties

Base Metal Price

8.0 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

3.4 kg CO2/kg material

Embodied Energy

50 MJ/kg 22 x 103 BTU/lb

Embodied Water

100 L/kg 12 gal/lb

Common Calculations

PREN (Pitting Resistance)

15

Resilience: Ultimate (Unit Rupture Work)

92 to 100 MJ/m3

Resilience: Unit (Modulus of Resilience)

570 to 5940 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

27 to 72 points

Strength to Weight: Bending

24 to 46 points

Thermal Diffusivity

8.3 mm2/s

Thermal Shock Resistance

25 to 67 points

Alloy Composition

Iron (Fe) 81.3 to 86.9
Chromium (Cr) 11 to 13
Carbon (C) 1.4 to 1.6
Molybdenum (Mo) 0.7 to 1.2
Vanadium (V) 0 to 1.1
Manganese (Mn) 0 to 0.6
Silicon (Si) 0 to 0.6
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 A681: Standard Specification for Tool Steels Alloy

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