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SAE-AISI D7 Steel vs. SAE-AISI P20 Steel

Both SAE-AISI D7 steel and SAE-AISI P20 steel are iron alloys. They have 82% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D7 steel and the bottom bar is SAE-AISI P20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 800 to 2120
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
45
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.8
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 11
1.6
Embodied Energy, MJ/kg 180
21
Embodied Water, L/kg 130
52

Common Calculations

PREN (Pitting Resistance) 16
2.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29 to 78
19 to 37
Strength to Weight: Bending, points 25 to 48
19 to 29
Thermal Diffusivity, mm2/s 7.4
12
Thermal Shock Resistance, points 27 to 72
18 to 35

Alloy Composition

Carbon (C), % 2.2 to 2.5
0.28 to 0.4
Chromium (Cr), % 11.5 to 13.5
0.4 to 2.0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 76.6 to 81.9
95.2 to 98.5
Manganese (Mn), % 0 to 0.6
0.35 to 0.71
Molybdenum (Mo), % 0.7 to 1.2
0.3 to 0.55
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.6
0.2 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 3.8 to 4.4
0

Comparable Variants