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Monel 400 vs. ASTM A387 Grade 9 Steel

Monel 400 belongs to the nickel alloys classification, while ASTM A387 grade 9 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is Monel 400 and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
190
Elongation at Break, % 20 to 40
20 to 21
Fatigue Strength, MPa 230 to 290
160 to 240
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 62
75
Shear Strength, MPa 370 to 490
310 to 380
Tensile Strength: Ultimate (UTS), MPa 540 to 780
500 to 600
Tensile Strength: Yield (Proof), MPa 210 to 590
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 1000
600
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1300
1410
Specific Heat Capacity, J/kg-K 430
470
Thermal Conductivity, W/m-K 23
26
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.3
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
10

Otherwise Unclassified Properties

Base Metal Price, % relative 50
6.5
Density, g/cm3 8.9
7.8
Embodied Carbon, kg CO2/kg material 7.9
2.1
Embodied Energy, MJ/kg 110
28
Embodied Water, L/kg 250
87

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 1080
140 to 310
Stiffness to Weight: Axial, points 10
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 17 to 25
18 to 21
Strength to Weight: Bending, points 17 to 21
18 to 20
Thermal Diffusivity, mm2/s 6.1
6.9
Thermal Shock Resistance, points 17 to 25
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.3
0 to 0.15
Chromium (Cr), % 0
8.0 to 10
Copper (Cu), % 28 to 34
0
Iron (Fe), % 0 to 2.5
87.1 to 90.8
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 63 to 72
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.024
0 to 0.025
Vanadium (V), % 0
0 to 0.040

Comparable Variants