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EN 1.6781 Steel vs. EN 1.4150 Stainless Steel

Both EN 1.6781 steel and EN 1.4150 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.6781 steel and the bottom bar is EN 1.4150 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
20
Fatigue Strength, MPa 450
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 830
730
Tensile Strength: Yield (Proof), MPa 680
430

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 450
840
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 44
23
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
8.5
Density, g/cm3 7.9
7.6
Embodied Carbon, kg CO2/kg material 1.9
2.8
Embodied Energy, MJ/kg 25
42
Embodied Water, L/kg 60
120

Common Calculations

PREN (Pitting Resistance) 3.3
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1220
470
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
27
Strength to Weight: Bending, points 25
24
Thermal Diffusivity, mm2/s 12
6.2
Thermal Shock Resistance, points 24
27

Alloy Composition

Carbon (C), % 0.15 to 0.19
0.45 to 0.6
Chromium (Cr), % 1.3 to 1.8
15 to 16.5
Iron (Fe), % 92.6 to 94.6
79 to 82.8
Manganese (Mn), % 0.55 to 0.8
0 to 0.8
Molybdenum (Mo), % 0.45 to 0.6
0.2 to 0.4
Nickel (Ni), % 3.0 to 3.5
0 to 0.4
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.5
1.3 to 1.7
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0
0.2 to 0.4