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EN 1.4901 Stainless Steel vs. EN 1.8918 Steel

Both EN 1.4901 stainless steel and EN 1.8918 steel are iron alloys. They have 89% of their average alloy composition in common. There are 31 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 1.4901 stainless steel and the bottom bar is EN 1.8918 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
19
Fatigue Strength, MPa 310
330
Impact Strength: V-Notched Charpy, J 38
88
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 460
400
Tensile Strength: Ultimate (UTS), MPa 740
640
Tensile Strength: Yield (Proof), MPa 490
490

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 650
400
Melting Completion (Liquidus), °C 1490
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
46
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.7
Embodied Energy, MJ/kg 40
24
Embodied Water, L/kg 89
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 620
640
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
23
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 6.9
12
Thermal Shock Resistance, points 23
19

Alloy Composition

Aluminum (Al), % 0 to 0.020
0.020 to 0.050
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.070 to 0.13
0 to 0.2
Chromium (Cr), % 8.5 to 9.5
0 to 0.3
Copper (Cu), % 0
0 to 0.7
Iron (Fe), % 85.8 to 89.1
95.2 to 98.9
Manganese (Mn), % 0.3 to 0.6
1.1 to 1.7
Molybdenum (Mo), % 0.3 to 0.6
0 to 0.1
Nickel (Ni), % 0 to 0.4
0 to 0.8
Niobium (Nb), % 0.040 to 0.090
0 to 0.050
Nitrogen (N), % 0.030 to 0.070
0 to 0.025
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.0050
Titanium (Ti), % 0 to 0.010
0 to 0.030
Tungsten (W), % 1.5 to 2.0
0
Vanadium (V), % 0.15 to 0.25
0 to 0.2
Zirconium (Zr), % 0 to 0.010
0