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ASTM A387 Grade 91 Class 2 vs. Grade N12MV Nickel

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while grade N12MV nickel belongs to the nickel alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is grade N12MV nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 20
6.8
Fatigue Strength, MPa 330
130
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 75
84
Tensile Strength: Ultimate (UTS), MPa 670
600
Tensile Strength: Yield (Proof), MPa 470
310

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Maximum Temperature: Mechanical, °C 600
900
Melting Completion (Liquidus), °C 1460
1620
Melting Onset (Solidus), °C 1420
1570
Specific Heat Capacity, J/kg-K 470
390
Thermal Expansion, µm/m-K 13
10

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
75
Density, g/cm3 7.8
9.2
Embodied Carbon, kg CO2/kg material 2.6
16
Embodied Energy, MJ/kg 37
200
Embodied Water, L/kg 88
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
34
Resilience: Unit (Modulus of Resilience), kJ/m3 580
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 24
18
Strength to Weight: Bending, points 22
17
Thermal Shock Resistance, points 19
19

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.12
Chromium (Cr), % 8.0 to 9.5
0 to 1.0
Iron (Fe), % 87.3 to 90.3
4.0 to 6.0
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.85 to 1.1
26 to 30
Nickel (Ni), % 0 to 0.4
60.2 to 69.8
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.2 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0.2 to 0.6
Zirconium (Zr), % 0 to 0.010
0