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S21904 Stainless Steel vs. EN 1.4594 Stainless Steel

Both S21904 stainless steel and EN 1.4594 stainless steel are iron alloys. They have 84% 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 S21904 stainless steel and the bottom bar is EN 1.4594 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
11 to 17
Fatigue Strength, MPa 380 to 550
490 to 620
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Shear Strength, MPa 510 to 620
620 to 700
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
1020 to 1170
Tensile Strength: Yield (Proof), MPa 390 to 910
810 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 430
450
Maximum Temperature: Mechanical, °C 980
820
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
16
Thermal Expansion, µm/m-K 17
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 15
15
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
3.2
Embodied Energy, MJ/kg 43
45
Embodied Water, L/kg 160
130

Common Calculations

PREN (Pitting Resistance) 25
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
110 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
1660 to 3320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
36 to 41
Strength to Weight: Bending, points 23 to 29
29 to 31
Thermal Diffusivity, mm2/s 3.8
4.4
Thermal Shock Resistance, points 15 to 21
34 to 39

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.070
Chromium (Cr), % 19 to 21.5
13 to 15
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 59.5 to 67.4
72.6 to 79.5
Manganese (Mn), % 8.0 to 10
0 to 1.0
Molybdenum (Mo), % 0
1.2 to 2.0
Nickel (Ni), % 5.5 to 7.5
5.0 to 6.0
Niobium (Nb), % 0
0.15 to 0.6
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.015