S32615 Stainless Steel vs. SAE-AISI P21 Steel

Both S32615 stainless steel and SAE-AISI P21 steel are iron alloys. They have 58% 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 S32615 stainless steel and the bottom bar is SAE-AISI P21 steel.

UNS S32615 Stainless Steel SAE-AISI P21 (T51621) Low-Carbon Mould Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		75
Shear Modulus, GPa		73

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		1130

Thermal Properties

Latent Heat of Fusion, J/g		370
Latent Heat of Fusion, J/g		250

Melting Completion (Liquidus), °C		1350
Melting Completion (Liquidus), °C		1450

Melting Onset (Solidus), °C		1310
Melting Onset (Solidus), °C		1410

Specific Heat Capacity, J/kg-K		500
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		24
Base Metal Price, % relative		6.5

Density, g/cm³		7.6
Density, g/cm³		7.9

Embodied Carbon, kg CO₂/kg material		4.4
Embodied Carbon, kg CO₂/kg material		2.3

Embodied Energy, MJ/kg		63
Embodied Energy, MJ/kg		32

Embodied Water, L/kg		170
Embodied Water, L/kg		62

Common Calculations

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

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

Strength to Weight: Axial, points		23
Strength to Weight: Axial, points		40

Strength to Weight: Bending, points		21
Strength to Weight: Bending, points		31

Thermal Shock Resistance, points		15
Thermal Shock Resistance, points		37

Alloy Composition

Carbon (C), %		0 to 0.070
Carbon (C), %		0.18 to 0.22

Chromium (Cr), %		16.5 to 19.5
Chromium (Cr), %		0 to 0.5

Cobalt (Co), %		0
Cobalt (Co), %		1.1 to 1.3

Copper (Cu), %		1.5 to 2.5
Copper (Cu), %		0 to 0.25

Iron (Fe), %		46.4 to 57.9
Iron (Fe), %		92.1 to 94.2

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0.35 to 0.72

Molybdenum (Mo), %		0.3 to 1.5
Molybdenum (Mo), %		0

Nickel (Ni), %		19 to 22
Nickel (Ni), %		3.9 to 4.3

Phosphorus (P), %		0 to 0.045
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		4.8 to 6.0
Silicon (Si), %		0.2 to 0.4

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

Vanadium (V), %		0
Vanadium (V), %		0.15 to 0.25