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N08925 Stainless Steel vs. S21904 Stainless Steel

Both N08925 stainless steel and S21904 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is N08925 stainless steel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
17 to 51
Fatigue Strength, MPa 310
380 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
78
Shear Strength, MPa 470
510 to 620
Tensile Strength: Ultimate (UTS), MPa 680
700 to 1000
Tensile Strength: Yield (Proof), MPa 340
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 420
430
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1410
1350
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 13
14
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 33
15
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
3.0
Embodied Energy, MJ/kg 84
43
Embodied Water, L/kg 200
160

Common Calculations

PREN (Pitting Resistance) 44
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 280
380 to 2070
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23
25 to 36
Strength to Weight: Bending, points 21
23 to 29
Thermal Diffusivity, mm2/s 3.5
3.8
Thermal Shock Resistance, points 15
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.040
Chromium (Cr), % 19 to 21
19 to 21.5
Copper (Cu), % 0.8 to 1.5
0
Iron (Fe), % 42.7 to 50.1
59.5 to 67.4
Manganese (Mn), % 0 to 1.0
8.0 to 10
Molybdenum (Mo), % 6.0 to 7.0
0
Nickel (Ni), % 24 to 26
5.5 to 7.5
Nitrogen (N), % 0.1 to 0.2
0.15 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030