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EN 1.4938 Stainless Steel vs. Nickel 690

EN 1.4938 stainless steel belongs to the iron alloys classification, while nickel 690 belongs to the nickel alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. 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 1.4938 stainless steel and the bottom bar is nickel 690.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
3.4 to 34
Fatigue Strength, MPa 390 to 520
180 to 300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Shear Strength, MPa 540 to 630
420 to 570
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
640 to 990
Tensile Strength: Yield (Proof), MPa 640 to 870
250 to 760

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Maximum Temperature: Mechanical, °C 750
1010
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 30
14
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
50
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 3.3
8.2
Embodied Energy, MJ/kg 47
120
Embodied Water, L/kg 110
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
31 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
160 to 1440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 37
21 to 33
Strength to Weight: Bending, points 26 to 29
20 to 27
Thermal Diffusivity, mm2/s 8.1
3.5
Thermal Shock Resistance, points 30 to 35
16 to 25

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.050
Chromium (Cr), % 11 to 12.5
27 to 31
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 80.5 to 84.8
7.0 to 11
Manganese (Mn), % 0.4 to 0.9
0 to 0.5
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
58 to 66
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.25 to 0.4
0

Comparable Variants