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S21904 Stainless Steel vs. ACI-ASTM CF10SMnN Steel

Both S21904 stainless steel and ACI-ASTM CF10SMnN steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 28 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 S21904 stainless steel and the bottom bar is ACI-ASTM CF10SMnN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
34
Fatigue Strength, MPa 380 to 550
260
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
660
Tensile Strength: Yield (Proof), MPa 390 to 910
330

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 980
900
Melting Completion (Liquidus), °C 1400
1360
Melting Onset (Solidus), °C 1350
1310
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
15
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 3.0
3.1
Embodied Energy, MJ/kg 43
45
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
180
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 25 to 36
24
Strength to Weight: Bending, points 23 to 29
22
Thermal Shock Resistance, points 15 to 21
15

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.1
Chromium (Cr), % 19 to 21.5
16 to 18
Iron (Fe), % 59.5 to 67.4
59.1 to 65.4
Manganese (Mn), % 8.0 to 10
7.0 to 9.0
Nickel (Ni), % 5.5 to 7.5
8.0 to 9.0
Nitrogen (N), % 0.15 to 0.4
0.080 to 0.18
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 1.0
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030