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ACI-ASTM CA40 Steel vs. S42030 Stainless Steel

Both ACI-ASTM CA40 steel and S42030 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA40 steel and the bottom bar is S42030 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10
16
Fatigue Strength, MPa 460
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 910
670
Tensile Strength: Yield (Proof), MPa 860
410

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 750
780
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1500
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
28
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
10
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.5
Embodied Energy, MJ/kg 28
34
Embodied Water, L/kg 100
110

Common Calculations

PREN (Pitting Resistance) 14
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
92
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
24
Strength to Weight: Bending, points 27
22
Thermal Diffusivity, mm2/s 6.7
7.7
Thermal Shock Resistance, points 33
24

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.3
Chromium (Cr), % 11.5 to 14
12 to 14
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 81.5 to 88.3
77.6 to 85
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
1.0 to 3.0
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030