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ACI-ASTM CA40 Steel vs. S31277 Stainless Steel

Both ACI-ASTM CA40 steel and S31277 stainless steel are iron alloys. They have 55% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA40 steel and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 10
45
Fatigue Strength, MPa 460
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 910
860
Tensile Strength: Yield (Proof), MPa 860
410

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 750
1100
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1500
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
36
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 2.0
6.7
Embodied Energy, MJ/kg 28
90
Embodied Water, L/kg 100
220

Common Calculations

PREN (Pitting Resistance) 14
51
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
320
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 33
29
Strength to Weight: Bending, points 27
25
Thermal Shock Resistance, points 33
19

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.020
Chromium (Cr), % 11.5 to 14
20.5 to 23
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 81.5 to 88.3
35.5 to 46.2
Manganese (Mn), % 0 to 1.0
0 to 3.0
Molybdenum (Mo), % 0 to 0.5
6.5 to 8.0
Nickel (Ni), % 0 to 1.0
26 to 28
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.010