SAE-AISI A4 Steel vs. S32615 Stainless Steel

Both SAE-AISI A4 steel and S32615 stainless steel are iron alloys. They have 56% of their average alloy composition in common. 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 SAE-AISI A4 steel and the bottom bar is S32615 stainless steel.

SAE-AISI A4 (T30104) Air-Hardening Steel UNS S32615 Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.29
Poisson's Ratio		0.28

Shear Modulus, GPa		73
Shear Modulus, GPa		75

Tensile Strength: Ultimate (UTS), MPa		710 to 2050
Tensile Strength: Ultimate (UTS), MPa		620

Thermal Properties

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

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

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

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

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

Otherwise Unclassified Properties

Base Metal Price, % relative		3.9
Base Metal Price, % relative		24

Density, g/cm³		7.8
Density, g/cm³		7.6

Embodied Carbon, kg CO₂/kg material		1.8
Embodied Carbon, kg CO₂/kg material		4.4

Embodied Energy, MJ/kg		24
Embodied Energy, MJ/kg		63

Embodied Water, L/kg		59
Embodied Water, L/kg		170

Common Calculations

PREN (Pitting Resistance)		5.3
PREN (Pitting Resistance)		21

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		25 to 73
Strength to Weight: Axial, points		23

Strength to Weight: Bending, points		23 to 46
Strength to Weight: Bending, points		21

Thermal Shock Resistance, points		23 to 67
Thermal Shock Resistance, points		15

Alloy Composition

Carbon (C), %		1.0 to 1.1
Carbon (C), %		0 to 0.070

Chromium (Cr), %		0.9 to 2.2
Chromium (Cr), %		16.5 to 19.5

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

Iron (Fe), %		92 to 95.5
Iron (Fe), %		46.4 to 57.9

Manganese (Mn), %		1.8 to 2.2
Manganese (Mn), %		0 to 2.0

Molybdenum (Mo), %		0.9 to 1.4
Molybdenum (Mo), %		0.3 to 1.5

Nickel (Ni), %		0 to 0.3
Nickel (Ni), %		19 to 22

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

Silicon (Si), %		0 to 0.5
Silicon (Si), %		4.8 to 6.0

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