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SAE-AISI P21 Steel vs. SAE-AISI 9310 Steel

Both SAE-AISI P21 steel and SAE-AISI 9310 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI P21 steel and the bottom bar is SAE-AISI 9310 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 1130
820 to 910

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
48
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
4.4
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.3
1.8
Embodied Energy, MJ/kg 32
24
Embodied Water, L/kg 62
57

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 40
29 to 32
Strength to Weight: Bending, points 31
25 to 27
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 37
24 to 27

Alloy Composition

Carbon (C), % 0.18 to 0.22
0.080 to 0.13
Chromium (Cr), % 0 to 0.5
1.0 to 1.4
Cobalt (Co), % 1.1 to 1.3
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.1 to 94.2
93.8 to 95.2
Manganese (Mn), % 0.35 to 0.72
0.45 to 0.65
Molybdenum (Mo), % 0
0.080 to 0.15
Nickel (Ni), % 3.9 to 4.3
3.0 to 3.5
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.2 to 0.4
0.2 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.012
Vanadium (V), % 0.15 to 0.25
0