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EN 1.1221 Steel vs. EN 1.4418 Stainless Steel

Both EN 1.1221 steel and EN 1.4418 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 30 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 EN 1.4418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10 to 21
16 to 20
Fatigue Strength, MPa 240 to 340
350 to 480
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 450 to 520
530 to 620
Tensile Strength: Ultimate (UTS), MPa 730 to 870
860 to 1000
Tensile Strength: Yield (Proof), MPa 390 to 550
540 to 790

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
870
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 48
15
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
2.8
Embodied Energy, MJ/kg 19
39
Embodied Water, L/kg 47
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
730 to 1590
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 31
31 to 36
Strength to Weight: Bending, points 23 to 26
26 to 28
Thermal Diffusivity, mm2/s 13
4.0
Thermal Shock Resistance, points 23 to 28
31 to 36

Alloy Composition

Carbon (C), % 0.57 to 0.65
0 to 0.060
Chromium (Cr), % 0 to 0.4
15 to 17
Iron (Fe), % 97.1 to 98.8
73.2 to 80.2
Manganese (Mn), % 0.6 to 0.9
0 to 1.5
Molybdenum (Mo), % 0 to 0.1
0.8 to 1.5
Nickel (Ni), % 0 to 0.4
4.0 to 6.0
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 0.7
Sulfur (S), % 0 to 0.035
0 to 0.015

Comparable Variants