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S17400 Stainless Steel vs. EN 1.1221 Steel

Both S17400 stainless steel and EN 1.1221 steel are iron alloys. They have 76% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is EN 1.1221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
210 to 250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
10 to 21
Fatigue Strength, MPa 380 to 670
240 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Shear Strength, MPa 570 to 830
450 to 520
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
730 to 870
Tensile Strength: Yield (Proof), MPa 580 to 1250
390 to 550

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 850
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
48
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
1.5
Embodied Energy, MJ/kg 39
19
Embodied Water, L/kg 130
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
67 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
410 to 800
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 49
26 to 31
Strength to Weight: Bending, points 27 to 35
23 to 26
Thermal Diffusivity, mm2/s 4.5
13
Thermal Shock Resistance, points 30 to 46
23 to 28

Alloy Composition

Carbon (C), % 0 to 0.070
0.57 to 0.65
Chromium (Cr), % 15 to 17
0 to 0.4
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
97.1 to 98.8
Manganese (Mn), % 0 to 1.0
0.6 to 0.9
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 3.0 to 5.0
0 to 0.4
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035