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ASTM Grade HI Steel vs. Nickel 242

ASTM grade HI steel belongs to the iron alloys classification, while nickel 242 belongs to the nickel alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 ASTM grade HI steel and the bottom bar is nickel 242.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 11
45
Fatigue Strength, MPa 150
300
Poisson's Ratio 0.27
0.3
Shear Modulus, GPa 79
84
Tensile Strength: Ultimate (UTS), MPa 550
820
Tensile Strength: Yield (Proof), MPa 270
350

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Mechanical, °C 1100
930
Melting Completion (Liquidus), °C 1400
1380
Melting Onset (Solidus), °C 1350
1290
Specific Heat Capacity, J/kg-K 490
400
Thermal Conductivity, W/m-K 15
11
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 23
75
Density, g/cm3 7.8
9.0
Embodied Carbon, kg CO2/kg material 4.1
14
Embodied Energy, MJ/kg 59
180
Embodied Water, L/kg 200
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
300
Resilience: Unit (Modulus of Resilience), kJ/m3 180
280
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 20
25
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 3.9
3.1
Thermal Shock Resistance, points 12
25

Alloy Composition

Aluminum (Al), % 0
0 to 0.5
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0.2 to 0.5
0 to 0.030
Chromium (Cr), % 26 to 30
7.0 to 9.0
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 46.9 to 59.8
0 to 2.0
Manganese (Mn), % 0 to 2.0
0 to 0.8
Molybdenum (Mo), % 0 to 0.5
24 to 26
Nickel (Ni), % 14 to 18
59.3 to 69
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.015