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ASTM A148 Cast Steel vs. S40945 Stainless Steel

Both ASTM A148 cast steel and S40945 stainless 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 ASTM A148 cast steel and the bottom bar is S40945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 390
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.7 to 25
25
Fatigue Strength, MPa 280 to 670
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Tensile Strength: Ultimate (UTS), MPa 630 to 1300
430
Tensile Strength: Yield (Proof), MPa 390 to 1160
230

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400 to 430
710
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 37 to 47
26
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3 to 7.5
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3 to 8.6
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3 to 3.3
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
2.2
Embodied Energy, MJ/kg 20 to 22
31
Embodied Water, L/kg 48 to 53
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
89
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 3570
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 46
15
Strength to Weight: Bending, points 21 to 34
16
Thermal Diffusivity, mm2/s 9.9 to 13
6.9
Thermal Shock Resistance, points 18 to 38
15