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SAE-AISI P20 Steel vs. Chromium 33

SAE-AISI P20 steel belongs to the iron alloys classification, while chromium 33 belongs to the otherwise unclassified metals. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI P20 steel and the bottom bar is chromium 33.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 540 to 1050
850

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
36
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.6
6.0
Embodied Energy, MJ/kg 21
84
Embodied Water, L/kg 52
250

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19 to 37
30
Strength to Weight: Bending, points 19 to 29
25
Thermal Shock Resistance, points 18 to 35
21

Alloy Composition

Carbon (C), % 0.28 to 0.4
0 to 0.015
Chromium (Cr), % 0.4 to 2.0
31 to 35
Copper (Cu), % 0 to 0.25
0.3 to 1.2
Iron (Fe), % 95.2 to 98.5
25.7 to 37.9
Manganese (Mn), % 0.35 to 0.71
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.55
0.5 to 2.0
Nickel (Ni), % 0
30 to 33
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.8
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010