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EN 1.4903 Stainless Steel vs. S21904 Stainless Steel

Both EN 1.4903 stainless steel and S21904 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 EN 1.4903 stainless steel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
17 to 51
Fatigue Strength, MPa 320 to 330
380 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Shear Strength, MPa 420
510 to 620
Tensile Strength: Ultimate (UTS), MPa 670 to 680
700 to 1000
Tensile Strength: Yield (Proof), MPa 500
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 380
430
Maximum Temperature: Mechanical, °C 650
980
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
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 88
160

Common Calculations

PREN (Pitting Resistance) 13
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 650
380 to 2070
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
25 to 36
Strength to Weight: Bending, points 22
23 to 29
Thermal Diffusivity, mm2/s 7.0
3.8
Thermal Shock Resistance, points 23
15 to 21

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.080 to 0.12
0 to 0.040
Chromium (Cr), % 8.0 to 9.5
19 to 21.5
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.1 to 90.5
59.5 to 67.4
Manganese (Mn), % 0.3 to 0.6
8.0 to 10
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
5.5 to 7.5
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0.15 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.18 to 0.25
0