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S21904 Stainless Steel vs. EN 1.4901 Stainless Steel

Both S21904 stainless steel and EN 1.4901 stainless steel are iron alloys. They have 73% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is EN 1.4901 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
19
Fatigue Strength, MPa 380 to 550
310
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Shear Strength, MPa 510 to 620
460
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
740
Tensile Strength: Yield (Proof), MPa 390 to 910
490

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Corrosion, °C 430
380
Maximum Temperature: Mechanical, °C 980
650
Melting Completion (Liquidus), °C 1400
1490
Melting Onset (Solidus), °C 1350
1450
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
26
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
2.8
Embodied Energy, MJ/kg 43
40
Embodied Water, L/kg 160
89

Common Calculations

PREN (Pitting Resistance) 25
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
120
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
620
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
26
Strength to Weight: Bending, points 23 to 29
23
Thermal Diffusivity, mm2/s 3.8
6.9
Thermal Shock Resistance, points 15 to 21
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 0 to 0.040
0.070 to 0.13
Chromium (Cr), % 19 to 21.5
8.5 to 9.5
Iron (Fe), % 59.5 to 67.4
85.8 to 89.1
Manganese (Mn), % 8.0 to 10
0.3 to 0.6
Molybdenum (Mo), % 0
0.3 to 0.6
Nickel (Ni), % 5.5 to 7.5
0 to 0.4
Niobium (Nb), % 0
0.040 to 0.090
Nitrogen (N), % 0.15 to 0.4
0.030 to 0.070
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
1.5 to 2.0
Vanadium (V), % 0
0.15 to 0.25
Zirconium (Zr), % 0
0 to 0.010