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EN 1.4107 Stainless Steel vs. EN 1.7221 Steel

Both EN 1.4107 stainless steel and EN 1.7221 steel are iron alloys. They have 88% of their average alloy composition in common. There are 30 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 1.4107 stainless steel and the bottom bar is EN 1.7221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18 to 21
11 to 17
Fatigue Strength, MPa 260 to 350
290 to 390
Impact Strength: V-Notched Charpy, J 45 to 50
20 to 38
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 620 to 700
650 to 780
Tensile Strength: Yield (Proof), MPa 400 to 570
430 to 630

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 740
420
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
44
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.5
Embodied Energy, MJ/kg 30
20
Embodied Water, L/kg 100
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
83 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
490 to 1050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22 to 25
23 to 27
Strength to Weight: Bending, points 21 to 22
21 to 24
Thermal Diffusivity, mm2/s 7.2
12
Thermal Shock Resistance, points 22 to 25
19 to 23

Alloy Composition

Carbon (C), % 0 to 0.1
0.22 to 0.29
Chromium (Cr), % 11.5 to 12.5
0.8 to 1.2
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 83.8 to 87.2
96.8 to 98.3
Manganese (Mn), % 0.5 to 0.8
0.5 to 0.8
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.3
Nickel (Ni), % 0.8 to 1.5
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.020
0 to 0.030
Vanadium (V), % 0 to 0.080
0