Chromium 33 vs. ACI-ASTM CH20 Steel

Chromium 33 belongs to the otherwise unclassified metals classification, while ACI-ASTM CH20 steel belongs to the iron alloys. They have 71% of their average alloy composition in common. 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 ACI-ASTM CH20 steel.

Chromium Alloy 33 (R20033)ACI-ASTM CH20 (SCS17, J93402) Cast Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		200

Elongation at Break, %		45
Elongation at Break, %		38

Poisson's Ratio		0.27
Poisson's Ratio		0.27

Shear Modulus, GPa		81
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		850
Tensile Strength: Ultimate (UTS), MPa		610

Tensile Strength: Yield (Proof), MPa		430
Tensile Strength: Yield (Proof), MPa		350

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		310

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		15

Otherwise Unclassified Properties

Base Metal Price, % relative		36
Base Metal Price, % relative		20

Density, g/cm³		7.9
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		6.0
Embodied Carbon, kg CO₂/kg material		3.7

Embodied Energy, MJ/kg		84
Embodied Energy, MJ/kg		53

Embodied Water, L/kg		250
Embodied Water, L/kg		180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		320
Resilience: Ultimate (Unit Rupture Work), MJ/m³		200

Resilience: Unit (Modulus of Resilience), kJ/m³		450
Resilience: Unit (Modulus of Resilience), kJ/m³		300

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		30
Strength to Weight: Axial, points		22

Strength to Weight: Bending, points		25
Strength to Weight: Bending, points		21

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		15

Alloy Composition

Carbon (C), %		0 to 0.015
Carbon (C), %		0 to 0.2

Chromium (Cr), %		31 to 35
Chromium (Cr), %		22 to 26

Copper (Cu), %		0.3 to 1.2
Copper (Cu), %		0

Iron (Fe), %		25.7 to 37.9
Iron (Fe), %		54.7 to 66

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0 to 1.5

Molybdenum (Mo), %		0.5 to 2.0
Molybdenum (Mo), %		0 to 0.5

Nickel (Ni), %		30 to 33
Nickel (Ni), %		12 to 15

Nitrogen (N), %		0.35 to 0.6
Nitrogen (N), %		0

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0 to 0.5
Silicon (Si), %		0 to 2.0

Sulfur (S), %		0 to 0.010
Sulfur (S), %		0 to 0.040