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EN 1.4938 Stainless Steel vs. Nickel 686

EN 1.4938 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 1.4938 stainless steel and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 16 to 17
51
Fatigue Strength, MPa 390 to 520
410
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
77
Shear Strength, MPa 540 to 630
560
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
780
Tensile Strength: Yield (Proof), MPa 640 to 870
350

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Maximum Temperature: Mechanical, °C 750
980
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
420
Thermal Conductivity, W/m-K 30
9.8
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
70
Density, g/cm3 7.8
9.0
Embodied Carbon, kg CO2/kg material 3.3
12
Embodied Energy, MJ/kg 47
170
Embodied Water, L/kg 110
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
320
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 31 to 37
24
Strength to Weight: Bending, points 26 to 29
21
Thermal Diffusivity, mm2/s 8.1
2.6
Thermal Shock Resistance, points 30 to 35
21

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.010
Chromium (Cr), % 11 to 12.5
19 to 23
Iron (Fe), % 80.5 to 84.8
0 to 5.0
Manganese (Mn), % 0.4 to 0.9
0 to 0.75
Molybdenum (Mo), % 1.5 to 2.0
15 to 17
Nickel (Ni), % 2.0 to 3.0
49.5 to 63
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
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
Vanadium (V), % 0.25 to 0.4
0