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ASTM A732 Cast Steel vs. S82121 Stainless Steel

Both ASTM A732 cast steel and S82121 stainless steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A732 cast steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 440
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 4.0 to 25
28
Fatigue Strength, MPa 230 to 750
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72 to 73
78
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
730
Tensile Strength: Yield (Proof), MPa 310 to 1340
510

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
290
Maximum Temperature: Mechanical, °C 400 to 430
1020
Melting Completion (Liquidus), °C 1440 to 1460
1430
Melting Onset (Solidus), °C 1400 to 1420
1380
Specific Heat Capacity, J/kg-K 470 to 480
480
Thermal Conductivity, W/m-K 39 to 50
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0 to 3.8
14
Density, g/cm3 7.8 to 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
2.8
Embodied Energy, MJ/kg 19 to 24
40
Embodied Water, L/kg 47 to 54
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 130
180
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
660
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 52
26
Strength to Weight: Bending, points 17 to 37
23
Thermal Diffusivity, mm2/s 10 to 14
4.0
Thermal Shock Resistance, points 14 to 43
20