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ASTM Grade HH Steel vs. N07750 Nickel

ASTM grade HH steel belongs to the iron alloys classification, while N07750 nickel belongs to the nickel alloys. They have a modest 36% 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 (5, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HH steel and the bottom bar is N07750 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
25
Fatigue Strength, MPa 150
520
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 580
1200
Tensile Strength: Yield (Proof), MPa 270
820

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Maximum Temperature: Mechanical, °C 1100
960
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1360
1400
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 14
13
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 20
60
Density, g/cm3 7.7
8.4
Embodied Carbon, kg CO2/kg material 3.7
10
Embodied Energy, MJ/kg 53
150
Embodied Water, L/kg 180
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 53
270
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1770
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21
40
Strength to Weight: Bending, points 20
30
Thermal Diffusivity, mm2/s 3.8
3.3
Thermal Shock Resistance, points 12
36

Alloy Composition

Aluminum (Al), % 0
0.4 to 1.0
Carbon (C), % 0.2 to 0.5
0 to 0.080
Chromium (Cr), % 24 to 28
14 to 17
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 52.9 to 64.8
5.0 to 9.0
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 11 to 14
70 to 77.7
Niobium (Nb), % 0
0.7 to 1.2
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.010
Titanium (Ti), % 0
2.3 to 2.8