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S21904 Stainless Steel vs. SAE-AISI 1146 Steel

Both S21904 stainless steel and SAE-AISI 1146 steel are iron alloys. They have 64% of their average alloy composition in common. There are 31 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 S21904 stainless steel and the bottom bar is SAE-AISI 1146 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
13 to 17
Fatigue Strength, MPa 380 to 550
240 to 400
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
72
Shear Strength, MPa 510 to 620
410 to 440
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
670 to 730
Tensile Strength: Yield (Proof), MPa 390 to 910
360 to 630

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
400
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
51
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 15
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.4
Embodied Energy, MJ/kg 43
18
Embodied Water, L/kg 160
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
93 to 97
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
340 to 1050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
24 to 26
Strength to Weight: Bending, points 23 to 29
22 to 23
Thermal Diffusivity, mm2/s 3.8
14
Thermal Shock Resistance, points 15 to 21
20 to 22

Alloy Composition

Carbon (C), % 0 to 0.040
0.42 to 0.49
Chromium (Cr), % 19 to 21.5
0
Iron (Fe), % 59.5 to 67.4
98.3 to 98.8
Manganese (Mn), % 8.0 to 10
0.7 to 1.0
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0.080 to 0.13