S31730 Stainless Steel vs. AWS ERNi-1

S31730 stainless steel belongs to the iron alloys classification, while AWS ERNi-1 belongs to the nickel alloys. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is AWS ERNi-1.

UNS S31730 Stainless Steel AWS ERNi-1 (N02061) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		180

Elongation at Break, %		40
Elongation at Break, %		22

Poisson's Ratio		0.28
Poisson's Ratio		0.31

Shear Modulus, GPa		77
Shear Modulus, GPa		69

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		470

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1360

Melting Onset (Solidus), °C		1390
Melting Onset (Solidus), °C		1310

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Base Metal Price, % relative		24
Base Metal Price, % relative		60

Density, g/cm³		8.0
Density, g/cm³		8.7

Embodied Carbon, kg CO₂/kg material		4.6
Embodied Carbon, kg CO₂/kg material		11

Embodied Energy, MJ/kg		63
Embodied Energy, MJ/kg		150

Embodied Water, L/kg		180
Embodied Water, L/kg		230

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		12

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		15

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		15

Thermal Shock Resistance, points		12
Thermal Shock Resistance, points		17

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 1.5

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.15

Chromium (Cr), %		17 to 19
Chromium (Cr), %		0

Copper (Cu), %		4.0 to 5.0
Copper (Cu), %		0 to 0.25

Iron (Fe), %		52.4 to 61
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		3.0 to 4.0
Molybdenum (Mo), %		0

Nickel (Ni), %		15 to 16.5
Nickel (Ni), %		93 to 98

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

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0 to 0.75

Sulfur (S), %		0 to 0.010
Sulfur (S), %		0 to 0.015

Titanium (Ti), %		0
Titanium (Ti), %		2.0 to 3.5

Residuals, %		0
Residuals, %		0 to 0.5