SAE-AISI P6 (T51606) Low-Carbon Mould Steel

SAE-AISI P6 steel is a tool steel. P6 is the designation in both the SAE and AISI systems for this material. T51606 is the UNS number.

The properties of SAE-AISI P6 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 P6 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 P6 Tool Steel Hardened P6 Tool Steel

Mechanical Properties

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 10⁶ psi

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 10⁶ psi

Tensile Strength: Ultimate (UTS)

630 to 1930 MPa 92 to 280 x 10³ psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Melting Completion (Liquidus)

1460 °C 2650 °F

Melting Onset (Solidus)

1420 °C 2580 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

43 W/m-K 25 BTU/h-ft-°F

Thermal Expansion

12 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.9 % IACS

Electrical Conductivity: Equal Weight (Specific)

9.0 % IACS

Otherwise Unclassified Properties

Base Metal Price

4.6 % relative

Density

7.9 g/cm³ 490 lb/ft³

Embodied Carbon

1.8 kg CO₂/kg material

Embodied Energy

24 MJ/kg 10 x 10³ BTU/lb

Embodied Water

59 L/kg 7.1 gal/lb

Common Calculations

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

22 to 68 points

Strength to Weight: Bending

21 to 44 points

Thermal Diffusivity

11 mm²/s

Thermal Shock Resistance

21 to 63 points

Alloy Composition

Iron (Fe)Fe		92.9 to 95
Nickel (Ni)Ni		3.3 to 3.8
Chromium (Cr)Cr		1.3 to 1.8
Manganese (Mn)Mn		0.35 to 0.7
Silicon (Si)Si		0.1 to 0.4
Copper (Cu)Cu		0 to 0.25
Carbon (C)C		0.050 to 0.15
Phosphorus (P)P		0 to 0.030
Sulfur (S)S		0 to 0.030