SAE-AISI P6 Steel vs. S21603 Stainless Steel

Both SAE-AISI P6 steel and S21603 stainless steel are iron alloys. They have 69% 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 SAE-AISI P6 steel and the bottom bar is S21603 stainless steel.

SAE-AISI P6 (T51606) Low-Carbon Mould Steel UNS S21603 (XM-18) Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.29
Poisson's Ratio		0.28

Shear Modulus, GPa		73
Shear Modulus, GPa		79

Tensile Strength: Ultimate (UTS), MPa		630 to 1930
Tensile Strength: Ultimate (UTS), MPa		690

Thermal Properties

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

Melting Completion (Liquidus), °C		1460
Melting Completion (Liquidus), °C		1420

Melting Onset (Solidus), °C		1420
Melting Onset (Solidus), °C		1380

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

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		17

Otherwise Unclassified Properties

Base Metal Price, % relative		4.6
Base Metal Price, % relative		17

Density, g/cm³		7.9
Density, g/cm³		7.7

Embodied Carbon, kg CO₂/kg material		1.8
Embodied Carbon, kg CO₂/kg material		3.6

Embodied Energy, MJ/kg		24
Embodied Energy, MJ/kg		50

Embodied Water, L/kg		59
Embodied Water, L/kg		160

Common Calculations

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

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

Strength to Weight: Axial, points		22 to 68
Strength to Weight: Axial, points		25

Strength to Weight: Bending, points		21 to 44
Strength to Weight: Bending, points		22

Thermal Shock Resistance, points		21 to 63
Thermal Shock Resistance, points		15

Alloy Composition

Carbon (C), %		0.050 to 0.15
Carbon (C), %		0 to 0.030

Chromium (Cr), %		1.3 to 1.8
Chromium (Cr), %		17.5 to 22

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

Iron (Fe), %		92.9 to 95
Iron (Fe), %		57.6 to 67.8

Manganese (Mn), %		0.35 to 0.7
Manganese (Mn), %		7.5 to 9.0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		2.0 to 3.0

Nickel (Ni), %		3.3 to 3.8
Nickel (Ni), %		5.0 to 7.0

Nitrogen (N), %		0
Nitrogen (N), %		0.25 to 0.5

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

Silicon (Si), %		0.1 to 0.4
Silicon (Si), %		0 to 0.75

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