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ACI-ASTM CA40 Steel vs. S21600 Stainless Steel

Both ACI-ASTM CA40 steel and S21600 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA40 steel and the bottom bar is S21600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10
46
Fatigue Strength, MPa 460
360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Tensile Strength: Ultimate (UTS), MPa 910
710
Tensile Strength: Yield (Proof), MPa 860
390

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 750
990
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1500
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 10
17

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
17
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
3.6
Embodied Energy, MJ/kg 28
50
Embodied Water, L/kg 100
160

Common Calculations

PREN (Pitting Resistance) 14
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
270
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
25
Strength to Weight: Bending, points 27
23
Thermal Shock Resistance, points 33
15

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.080
Chromium (Cr), % 11.5 to 14
17.5 to 22
Iron (Fe), % 81.5 to 88.3
57.6 to 67.8
Manganese (Mn), % 0 to 1.0
7.5 to 9.0
Molybdenum (Mo), % 0 to 0.5
2.0 to 3.0
Nickel (Ni), % 0 to 1.0
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.5
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030