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EN 1.7366 Steel vs. S21904 Stainless Steel

Both EN 1.7366 steel and S21904 stainless steel are iron alloys. They have 69% 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 1.7366 steel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 210
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 19
17 to 51
Fatigue Strength, MPa 160 to 320
380 to 550
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
78
Shear Strength, MPa 290 to 440
510 to 620
Tensile Strength: Ultimate (UTS), MPa 460 to 710
700 to 1000
Tensile Strength: Yield (Proof), MPa 230 to 480
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 510
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 40
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
3.0
Embodied Energy, MJ/kg 23
43
Embodied Water, L/kg 69
160

Common Calculations

PREN (Pitting Resistance) 6.8
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 110
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 600
380 to 2070
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16 to 25
25 to 36
Strength to Weight: Bending, points 17 to 23
23 to 29
Thermal Diffusivity, mm2/s 11
3.8
Thermal Shock Resistance, points 13 to 20
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.040
Chromium (Cr), % 4.0 to 6.0
19 to 21.5
Iron (Fe), % 91.9 to 95.3
59.5 to 67.4
Manganese (Mn), % 0.3 to 0.8
8.0 to 10
Molybdenum (Mo), % 0.45 to 0.65
0
Nickel (Ni), % 0
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030

Comparable Variants