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ASTM A732 Cast Steel vs. AISI 420 Stainless Steel

Both ASTM A732 cast steel and AISI 420 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 AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 440
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 4.0 to 25
8.0 to 15
Fatigue Strength, MPa 230 to 750
220 to 670
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72 to 73
76
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
690 to 1720
Tensile Strength: Yield (Proof), MPa 310 to 1340
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
280
Maximum Temperature: Mechanical, °C 400 to 430
620
Melting Completion (Liquidus), °C 1440 to 1460
1510
Melting Onset (Solidus), °C 1400 to 1420
1450
Specific Heat Capacity, J/kg-K 470 to 480
480
Thermal Conductivity, W/m-K 39 to 50
27
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0 to 3.8
7.5
Density, g/cm3 7.8 to 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
2.0
Embodied Energy, MJ/kg 19 to 24
28
Embodied Water, L/kg 47 to 54
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 130
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
380 to 4410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 52
25 to 62
Strength to Weight: Bending, points 17 to 37
22 to 41
Thermal Diffusivity, mm2/s 10 to 14
7.3
Thermal Shock Resistance, points 14 to 43
25 to 62