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S81921 Stainless Steel vs. ASTM A148 Cast Steel

Both S81921 stainless steel and ASTM A148 cast steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S81921 stainless steel and the bottom bar is ASTM A148 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
190 to 390
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
5.7 to 25
Fatigue Strength, MPa 370
280 to 670
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 710
630 to 1300
Tensile Strength: Yield (Proof), MPa 500
390 to 1160

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 990
400 to 430
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
37 to 47
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.3 to 7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3 to 8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.3 to 3.3
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.5 to 1.7
Embodied Energy, MJ/kg 41
20 to 22
Embodied Water, L/kg 150
48 to 53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
71 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 630
400 to 3570
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
22 to 46
Strength to Weight: Bending, points 23
21 to 34
Thermal Diffusivity, mm2/s 4.0
9.9 to 13
Thermal Shock Resistance, points 20
18 to 38