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EN 1.4031 Stainless Steel vs. Nickel 686

EN 1.4031 stainless steel belongs to the iron alloys classification, while nickel 686 belongs to the nickel alloys. There are 30 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 1.4031 stainless steel and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 11 to 13
51
Fatigue Strength, MPa 220 to 400
410
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
77
Shear Strength, MPa 400 to 540
560
Tensile Strength: Ultimate (UTS), MPa 670 to 900
780
Tensile Strength: Yield (Proof), MPa 390 to 730
350

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Maximum Temperature: Mechanical, °C 770
980
Melting Completion (Liquidus), °C 1440
1380
Melting Onset (Solidus), °C 1400
1340
Specific Heat Capacity, J/kg-K 480
420
Thermal Conductivity, W/m-K 30
9.8
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
70
Density, g/cm3 7.7
9.0
Embodied Carbon, kg CO2/kg material 1.9
12
Embodied Energy, MJ/kg 27
170
Embodied Water, L/kg 100
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
320
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 24 to 32
24
Strength to Weight: Bending, points 22 to 27
21
Thermal Diffusivity, mm2/s 8.1
2.6
Thermal Shock Resistance, points 23 to 32
21

Alloy Composition

Carbon (C), % 0.36 to 0.42
0 to 0.010
Chromium (Cr), % 12.5 to 14.5
19 to 23
Iron (Fe), % 83 to 87.1
0 to 5.0
Manganese (Mn), % 0 to 1.0
0 to 0.75
Molybdenum (Mo), % 0
15 to 17
Nickel (Ni), % 0
49.5 to 63
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.080
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 0
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4