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EN 1.1221 Steel vs. S20161 Stainless Steel

Both EN 1.1221 steel and S20161 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
46
Fatigue Strength, MPa 240 to 340
360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Shear Strength, MPa 450 to 520
690
Tensile Strength: Ultimate (UTS), MPa 730 to 870
980
Tensile Strength: Yield (Proof), MPa 390 to 550
390

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 400
870
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1410
1330
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 48
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
12
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.5
2.7
Embodied Energy, MJ/kg 19
39
Embodied Water, L/kg 47
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
360
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 26 to 31
36
Strength to Weight: Bending, points 23 to 26
29
Thermal Diffusivity, mm2/s 13
4.0
Thermal Shock Resistance, points 23 to 28
22

Alloy Composition

Carbon (C), % 0.57 to 0.65
0 to 0.15
Chromium (Cr), % 0 to 0.4
15 to 18
Iron (Fe), % 97.1 to 98.8
65.6 to 73.9
Manganese (Mn), % 0.6 to 0.9
4.0 to 6.0
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
4.0 to 6.0
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
3.0 to 4.0
Sulfur (S), % 0 to 0.035
0 to 0.040