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Chromium 33 vs. EN 1.7720 Steel

Chromium 33 belongs to the otherwise unclassified metals classification, while EN 1.7720 steel belongs to the iron alloys. They have a modest 34% 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 (11, in this case) are not shown.

For each property being compared, the top bar is chromium 33 and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
19
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 850
590
Tensile Strength: Yield (Proof), MPa 430
340

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 36
2.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 6.0
2.2
Embodied Energy, MJ/kg 84
30
Embodied Water, L/kg 250
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
97
Resilience: Unit (Modulus of Resilience), kJ/m3 450
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 30
21
Strength to Weight: Bending, points 25
20
Thermal Shock Resistance, points 21
17

Alloy Composition

Carbon (C), % 0 to 0.015
0.1 to 0.15
Chromium (Cr), % 31 to 35
0.3 to 0.5
Copper (Cu), % 0.3 to 1.2
0 to 0.3
Iron (Fe), % 25.7 to 37.9
96.6 to 98.6
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 0.5 to 2.0
0.4 to 0.6
Nickel (Ni), % 30 to 33
0 to 0.4
Nitrogen (N), % 0.35 to 0.6
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.45
Sulfur (S), % 0 to 0.010
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3