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EN 1.4008 Stainless Steel vs. EN 1.1181 Steel

Both EN 1.4008 stainless steel and EN 1.1181 steel are iron alloys. They have 86% 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 1.4008 stainless steel and the bottom bar is EN 1.1181 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
19 to 20
Fatigue Strength, MPa 300
190 to 260
Impact Strength: V-Notched Charpy, J 31
23 to 38
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 670
560 to 620
Tensile Strength: Yield (Proof), MPa 500
280 to 380

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 760
400
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
42
Thermal Expansion, µm/m-K 11
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.4
Embodied Energy, MJ/kg 30
19
Embodied Water, L/kg 100
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
90 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 630
210 to 380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
20 to 22
Strength to Weight: Bending, points 22
19 to 21
Thermal Diffusivity, mm2/s 6.7
11
Thermal Shock Resistance, points 23
19 to 21

Alloy Composition

Carbon (C), % 0 to 0.1
0.32 to 0.39
Chromium (Cr), % 12 to 13.5
0 to 0.4
Iron (Fe), % 81.8 to 86.8
97.4 to 99.18
Manganese (Mn), % 0 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0.2 to 0.5
0 to 0.1
Nickel (Ni), % 1.0 to 2.0
0 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035