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EN 1.4518 Stainless Steel vs. EN 1.6781 Steel

Both EN 1.4518 stainless steel and EN 1.6781 steel are iron alloys. They have 72% of their average alloy composition in common. There are 30 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 1.4518 stainless steel and the bottom bar is EN 1.6781 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
17
Fatigue Strength, MPa 160
450
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 490
830
Tensile Strength: Yield (Proof), MPa 210
680

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Maximum Temperature: Mechanical, °C 1000
450
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
44
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 20
5.0
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.0
1.9
Embodied Energy, MJ/kg 55
25
Embodied Water, L/kg 160
60

Common Calculations

PREN (Pitting Resistance) 30
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
130
Resilience: Unit (Modulus of Resilience), kJ/m3 100
1220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
29
Strength to Weight: Bending, points 18
25
Thermal Diffusivity, mm2/s 4.1
12
Thermal Shock Resistance, points 14
24

Alloy Composition

Carbon (C), % 0 to 0.030
0.15 to 0.19
Chromium (Cr), % 18 to 20
1.3 to 1.8
Iron (Fe), % 61.4 to 70
92.6 to 94.6
Manganese (Mn), % 0 to 1.5
0.55 to 0.8
Molybdenum (Mo), % 3.0 to 3.5
0.45 to 0.6
Nickel (Ni), % 9.0 to 12
3.0 to 3.5
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015