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EN 1.7366 Steel vs. S81921 Stainless Steel

Both EN 1.7366 steel and S81921 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 32 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 EN 1.7366 steel and the bottom bar is S81921 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 210
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 19
29
Fatigue Strength, MPa 160 to 320
370
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
79
Shear Strength, MPa 290 to 440
460
Tensile Strength: Ultimate (UTS), MPa 460 to 710
710
Tensile Strength: Yield (Proof), MPa 230 to 480
500

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 510
990
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
14
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.9
Embodied Energy, MJ/kg 23
41
Embodied Water, L/kg 69
150

Common Calculations

PREN (Pitting Resistance) 6.8
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 110
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 600
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16 to 25
25
Strength to Weight: Bending, points 17 to 23
23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 13 to 20
20

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.030
Chromium (Cr), % 4.0 to 6.0
19 to 22
Iron (Fe), % 91.9 to 95.3
66.7 to 75.9
Manganese (Mn), % 0.3 to 0.8
2.0 to 4.0
Molybdenum (Mo), % 0.45 to 0.65
1.0 to 2.0
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030