S31730 Stainless Steel vs. Chromium 33

S31730 stainless steel belongs to the iron alloys classification, while chromium 33 belongs to the otherwise unclassified metals. They have 69% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is chromium 33.

UNS S31730 Stainless Steel Chromium Alloy 33 (R20033)

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		40
Elongation at Break, %		45

Poisson's Ratio		0.28
Poisson's Ratio		0.27

Shear Modulus, GPa		77
Shear Modulus, GPa		81

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		850

Tensile Strength: Yield (Proof), MPa		200
Tensile Strength: Yield (Proof), MPa		430

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		320

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Base Metal Price, % relative		24
Base Metal Price, % relative		36

Density, g/cm³		8.0
Density, g/cm³		7.9

Embodied Carbon, kg CO₂/kg material		4.6
Embodied Carbon, kg CO₂/kg material		6.0

Embodied Energy, MJ/kg		63
Embodied Energy, MJ/kg		84

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		170
Resilience: Ultimate (Unit Rupture Work), MJ/m³		320

Resilience: Unit (Modulus of Resilience), kJ/m³		99
Resilience: Unit (Modulus of Resilience), kJ/m³		450

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

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		30

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		25

Thermal Shock Resistance, points		12
Thermal Shock Resistance, points		21

Alloy Composition

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.015

Chromium (Cr), %		17 to 19
Chromium (Cr), %		31 to 35

Copper (Cu), %		4.0 to 5.0
Copper (Cu), %		0.3 to 1.2

Iron (Fe), %		52.4 to 61
Iron (Fe), %		25.7 to 37.9

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

Molybdenum (Mo), %		3.0 to 4.0
Molybdenum (Mo), %		0.5 to 2.0

Nickel (Ni), %		15 to 16.5
Nickel (Ni), %		30 to 33

Nitrogen (N), %		0 to 0.045
Nitrogen (N), %		0.35 to 0.6

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

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0 to 0.5

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