S31730 Stainless Steel vs. AWS E33-31

Both S31730 stainless steel and AWS E33-31 are iron alloys. They have 67% 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 AWS E33-31.

UNS S31730 Stainless Steel AWS E33-31 (W33310) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		210

Elongation at Break, %		40
Elongation at Break, %		29

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		810

Thermal Properties

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

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1380

Melting Onset (Solidus), °C		1390
Melting Onset (Solidus), °C		1330

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		86

Embodied Water, L/kg		180
Embodied Water, L/kg		260

Common Calculations

PREN (Pitting Resistance)		30
PREN (Pitting Resistance)		44

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		28

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		24

Thermal Shock Resistance, points		12
Thermal Shock Resistance, points		19

Alloy Composition

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

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

Copper (Cu), %		4.0 to 5.0
Copper (Cu), %		0.4 to 0.8

Iron (Fe), %		52.4 to 61
Iron (Fe), %		24.7 to 34.8

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		2.5 to 4.0

Molybdenum (Mo), %		3.0 to 4.0
Molybdenum (Mo), %		1.0 to 2.0

Nickel (Ni), %		15 to 16.5
Nickel (Ni), %		30 to 32

Nitrogen (N), %		0 to 0.045
Nitrogen (N), %		0.3 to 0.5

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

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0 to 0.9

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