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S21904 Stainless Steel vs. EN 1.4449 Stainless Steel

Both S21904 stainless steel and EN 1.4449 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 33 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 S21904 stainless steel and the bottom bar is EN 1.4449 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
48
Fatigue Strength, MPa 380 to 550
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Shear Strength, MPa 510 to 620
440
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
620
Tensile Strength: Yield (Proof), MPa 390 to 910
250

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 980
960
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 15
19
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
3.9
Embodied Energy, MJ/kg 43
54
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
240
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
22
Strength to Weight: Bending, points 23 to 29
20
Thermal Diffusivity, mm2/s 3.8
4.0
Thermal Shock Resistance, points 15 to 21
14

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.035
Chromium (Cr), % 19 to 21.5
17 to 18.2
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 59.5 to 67.4
62.4 to 69.3
Manganese (Mn), % 8.0 to 10
0 to 2.0
Molybdenum (Mo), % 0
2.3 to 2.8
Nickel (Ni), % 5.5 to 7.5
11.5 to 12.5
Nitrogen (N), % 0.15 to 0.4
0 to 0.080
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015