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AISI 446 Stainless Steel vs. S21904 Stainless Steel

Both AISI 446 stainless steel and S21904 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 33 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 AISI 446 stainless steel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
17 to 51
Fatigue Strength, MPa 200
380 to 550
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
78
Shear Strength, MPa 360
510 to 620
Tensile Strength: Ultimate (UTS), MPa 570
700 to 1000
Tensile Strength: Yield (Proof), MPa 300
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 440
430
Maximum Temperature: Mechanical, °C 1180
980
Melting Completion (Liquidus), °C 1510
1400
Melting Onset (Solidus), °C 1430
1350
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.4
3.0
Embodied Energy, MJ/kg 35
43
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 27
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 230
380 to 2070
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 21
25 to 36
Strength to Weight: Bending, points 20
23 to 29
Thermal Diffusivity, mm2/s 4.6
3.8
Thermal Shock Resistance, points 19
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.040
Chromium (Cr), % 23 to 27
19 to 21.5
Iron (Fe), % 69.2 to 77
59.5 to 67.4
Manganese (Mn), % 0 to 1.5
8.0 to 10
Nickel (Ni), % 0 to 0.75
5.5 to 7.5
Nitrogen (N), % 0 to 0.25
0.15 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030