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S21904 Stainless Steel vs. EN 1.6368 Steel

Both S21904 stainless steel and EN 1.6368 steel are iron alloys. They have 66% 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 S21904 stainless steel and the bottom bar is EN 1.6368 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
18
Fatigue Strength, MPa 380 to 550
310 to 330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 510 to 620
410 to 430
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
660 to 690
Tensile Strength: Yield (Proof), MPa 390 to 910
460 to 490

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
410
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
40
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 15
3.4
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
1.7
Embodied Energy, MJ/kg 43
22
Embodied Water, L/kg 160
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
580 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
23 to 24
Strength to Weight: Bending, points 23 to 29
21 to 22
Thermal Diffusivity, mm2/s 3.8
11
Thermal Shock Resistance, points 15 to 21
20

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.040
Carbon (C), % 0 to 0.040
0 to 0.17
Chromium (Cr), % 19 to 21.5
0 to 0.3
Copper (Cu), % 0
0.5 to 0.8
Iron (Fe), % 59.5 to 67.4
95.1 to 97.2
Manganese (Mn), % 8.0 to 10
0.8 to 1.2
Molybdenum (Mo), % 0
0.25 to 0.5
Nickel (Ni), % 5.5 to 7.5
1.0 to 1.3
Niobium (Nb), % 0
0.015 to 0.045
Nitrogen (N), % 0.15 to 0.4
0 to 0.020
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0.25 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010