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EN 1.1221 Steel vs. EN 1.4008 Stainless Steel

Both EN 1.1221 steel and EN 1.4008 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 29 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 EN 1.1221 steel and the bottom bar is EN 1.4008 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
17
Fatigue Strength, MPa 240 to 340
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Tensile Strength: Ultimate (UTS), MPa 730 to 870
670
Tensile Strength: Yield (Proof), MPa 390 to 550
500

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
760
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
25
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
2.1
Embodied Energy, MJ/kg 19
30
Embodied Water, L/kg 47
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
100
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
630
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 31
24
Strength to Weight: Bending, points 23 to 26
22
Thermal Diffusivity, mm2/s 13
6.7
Thermal Shock Resistance, points 23 to 28
23

Alloy Composition

Carbon (C), % 0.57 to 0.65
0 to 0.1
Chromium (Cr), % 0 to 0.4
12 to 13.5
Iron (Fe), % 97.1 to 98.8
81.8 to 86.8
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0 to 0.1
0.2 to 0.5
Nickel (Ni), % 0 to 0.4
1.0 to 2.0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.025