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Chromium 33 vs. SAE-AISI 9255 Steel

Chromium 33 belongs to the otherwise unclassified metals classification, while SAE-AISI 9255 steel belongs to the iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 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 chromium 33 and the bottom bar is SAE-AISI 9255 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
21
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
72
Tensile Strength: Ultimate (UTS), MPa 850
680
Tensile Strength: Yield (Proof), MPa 430
390

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 36
2.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 6.0
1.5
Embodied Energy, MJ/kg 84
20
Embodied Water, L/kg 250
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
120
Resilience: Unit (Modulus of Resilience), kJ/m3 450
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 30
24
Strength to Weight: Bending, points 25
22
Thermal Shock Resistance, points 21
21

Alloy Composition

Carbon (C), % 0 to 0.015
0.51 to 0.59
Chromium (Cr), % 31 to 35
0
Copper (Cu), % 0.3 to 1.2
0
Iron (Fe), % 25.7 to 37.9
96.2 to 97
Manganese (Mn), % 0 to 2.0
0.7 to 1.0
Molybdenum (Mo), % 0.5 to 2.0
0
Nickel (Ni), % 30 to 33
0
Nitrogen (N), % 0.35 to 0.6
0
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.5
1.8 to 2.2
Sulfur (S), % 0 to 0.010
0 to 0.040