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S31655 Stainless Steel vs. EN 1.1221 Steel

Both S31655 stainless steel and EN 1.1221 steel are iron alloys. They have 69% 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 S31655 stainless steel and the bottom bar is EN 1.1221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
210 to 250
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
10 to 21
Fatigue Strength, MPa 300
240 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
72
Shear Strength, MPa 490
450 to 520
Tensile Strength: Ultimate (UTS), MPa 710
730 to 870
Tensile Strength: Yield (Proof), MPa 350
390 to 550

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1010
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
1.5
Embodied Energy, MJ/kg 46
19
Embodied Water, L/kg 160
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
67 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 310
410 to 800
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
26 to 31
Strength to Weight: Bending, points 23
23 to 26
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 16
23 to 28

Alloy Composition

Carbon (C), % 0 to 0.030
0.57 to 0.65
Chromium (Cr), % 19.5 to 21.5
0 to 0.4
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 63.2 to 71.9
97.1 to 98.8
Manganese (Mn), % 0 to 2.0
0.6 to 0.9
Molybdenum (Mo), % 0.5 to 1.5
0 to 0.1
Nickel (Ni), % 8.0 to 9.5
0 to 0.4
Nitrogen (N), % 0.14 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035