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EN 1.4421 Stainless Steel vs. S21904 Stainless Steel

Both EN 1.4421 stainless steel and S21904 stainless steel are iron alloys. They have 86% 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 EN 1.4421 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, % 11 to 17
17 to 51
Fatigue Strength, MPa 380 to 520
380 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
700 to 1000
Tensile Strength: Yield (Proof), MPa 620 to 950
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
430
Maximum Temperature: Mechanical, °C 870
980
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.6
3.0
Embodied Energy, MJ/kg 36
43
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 18
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
380 to 2070
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 39
25 to 36
Strength to Weight: Bending, points 26 to 30
23 to 29
Thermal Diffusivity, mm2/s 4.4
3.8
Thermal Shock Resistance, points 31 to 39
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.040
Chromium (Cr), % 15.5 to 17.5
19 to 21.5
Iron (Fe), % 74.4 to 80.5
59.5 to 67.4
Manganese (Mn), % 0 to 1.0
8.0 to 10
Molybdenum (Mo), % 0 to 0.7
0
Nickel (Ni), % 4.0 to 5.5
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030

Comparable Variants