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ACI-ASTM CF10SMnN Steel vs. S21800 Stainless Steel

Both ACI-ASTM CF10SMnN steel and S21800 stainless steel are iron alloys. Their average alloy composition is basically identical. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF10SMnN steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 34
40
Fatigue Strength, MPa 260
330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
75
Tensile Strength: Ultimate (UTS), MPa 660
740
Tensile Strength: Yield (Proof), MPa 330
390

Thermal Properties

Latent Heat of Fusion, J/g 340
340
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 900
900
Melting Completion (Liquidus), °C 1360
1360
Melting Onset (Solidus), °C 1310
1310
Specific Heat Capacity, J/kg-K 500
500
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
15
Density, g/cm3 7.5
7.5
Embodied Carbon, kg CO2/kg material 3.1
3.1
Embodied Energy, MJ/kg 45
45
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
250
Resilience: Unit (Modulus of Resilience), kJ/m3 280
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
26
Strength to Weight: Axial, points 24
27
Strength to Weight: Bending, points 22
24
Thermal Shock Resistance, points 15
17

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.1
Chromium (Cr), % 16 to 18
16 to 18
Iron (Fe), % 59.1 to 65.4
59.1 to 65.4
Manganese (Mn), % 7.0 to 9.0
7.0 to 9.0
Nickel (Ni), % 8.0 to 9.0
8.0 to 9.0
Nitrogen (N), % 0.080 to 0.18
0.080 to 0.18
Phosphorus (P), % 0 to 0.060
0 to 0.060
Silicon (Si), % 3.5 to 4.5
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030