S31727 Stainless Steel vs. SAE-AISI P3 Steel

Both S31727 stainless steel and SAE-AISI P3 steel are iron alloys. They have 60% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is SAE-AISI P3 steel.

UNS S31727 Stainless Steel SAE-AISI P3 (T51603) Low-Carbon Mould Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		78
Shear Modulus, GPa		73

Tensile Strength: Ultimate (UTS), MPa		630
Tensile Strength: Ultimate (UTS), MPa		410 to 1980

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		250

Melting Completion (Liquidus), °C		1440
Melting Completion (Liquidus), °C		1460

Melting Onset (Solidus), °C		1390
Melting Onset (Solidus), °C		1420

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

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		24
Base Metal Price, % relative		2.8

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

Embodied Carbon, kg CO₂/kg material		4.7
Embodied Carbon, kg CO₂/kg material		1.5

Embodied Energy, MJ/kg		64
Embodied Energy, MJ/kg		20

Embodied Water, L/kg		180
Embodied Water, L/kg		50

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

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

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		15 to 70

Strength to Weight: Bending, points		20
Strength to Weight: Bending, points		16 to 44

Thermal Shock Resistance, points		14
Thermal Shock Resistance, points		14 to 65

Alloy Composition

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.1

Chromium (Cr), %		17.5 to 19
Chromium (Cr), %		0.4 to 0.75

Copper (Cu), %		2.8 to 4.0
Copper (Cu), %		0 to 0.25

Iron (Fe), %		53.7 to 61.3
Iron (Fe), %		96.3 to 98.4

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0.2 to 0.6

Molybdenum (Mo), %		3.8 to 4.5
Molybdenum (Mo), %		0

Nickel (Ni), %		14.5 to 16.5
Nickel (Ni), %		1.0 to 1.5

Nitrogen (N), %		0.15 to 0.21
Nitrogen (N), %		0

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

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0 to 0.4

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.030