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AISI 409 Stainless Steel vs. Austenitic Grey Cast Iron

Both AISI 409 stainless steel and austenitic grey cast iron are iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is AISI 409 stainless steel and the bottom bar is austenitic grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Poisson's Ratio 0.28
0.29 to 0.3
Shear Modulus, GPa 75
69 to 72
Tensile Strength: Ultimate (UTS), MPa 420
150 to 230

Thermal Properties

Latent Heat of Fusion, J/g 270
280 to 350
Melting Completion (Liquidus), °C 1450
1340 to 1400
Melting Onset (Solidus), °C 1400
1290 to 1350
Specific Heat Capacity, J/kg-K 480
470 to 490
Thermal Expansion, µm/m-K 11
13 to 14

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
14 to 24
Density, g/cm3 7.7
7.7 to 8.1
Embodied Carbon, kg CO2/kg material 2.0
3.1 to 4.7
Embodied Energy, MJ/kg 28
43 to 65
Embodied Water, L/kg 94
93 to 120

Common Calculations

PREN (Pitting Resistance) 11
2.0 to 5.0
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23 to 25
Strength to Weight: Axial, points 15
5.3 to 8.2
Strength to Weight: Bending, points 16
7.9 to 11
Thermal Shock Resistance, points 15
4.5 to 6.5