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SAE-AISI D5 (T30405) Chromium Cold-Work Steel

SAE-AISI D5 steel is a tool steel. D5 is the designation in both the SAE and AISI systems for this material. T30405 is the UNS number.

The properties of SAE-AISI D5 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 D5 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

5.4 to 14 %

Poisson's Ratio


Shear Modulus

75 GPa 11 x 106 psi

Shear Strength

470 to 1180 MPa 68 to 170 x 103 psi

Tensile Strength: Ultimate (UTS)

770 to 2030 MPa 110 to 290 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Melting Completion (Liquidus)

1430 °C 2610 °F

Melting Onset (Solidus)

1390 °C 2530 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

27 W/m-K 16 BTU/h-ft-°F

Thermal Expansion

11 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

4.2 % IACS

Electrical Conductivity: Equal Weight (Specific)

4.9 % IACS

Otherwise Unclassified Properties

Base Metal Price

13 % relative


7.7 g/cm3 480 lb/ft3

Embodied Carbon

3.5 kg CO2/kg material

Embodied Energy

51 MJ/kg 22 x 103 BTU/lb

Embodied Water

120 L/kg 14 gal/lb

Common Calculations

PREN (Pitting Resistance)


Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

28 to 73 points

Strength to Weight: Bending

24 to 46 points

Thermal Diffusivity

7.4 mm2/s

Thermal Shock Resistance

26 to 67 points

Alloy Composition

Iron (Fe)Fe 77.9 to 84.4
Chromium (Cr)Cr 11 to 13
Cobalt (Co)Co 2.5 to 3.5
Carbon (C)C 1.4 to 1.6
Molybdenum (Mo)Mo 0.7 to 1.2
Vanadium (V)V 0 to 1.0
Manganese (Mn)Mn 0 to 0.6
Silicon (Si)Si 0 to 0.6
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

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