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ASTM Grade HD Steel vs. Nickel 684

ASTM grade HD steel belongs to the iron alloys classification, while nickel 684 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 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HD steel and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.1
11
Fatigue Strength, MPa 140
390
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
76
Tensile Strength: Ultimate (UTS), MPa 590
1190
Tensile Strength: Yield (Proof), MPa 270
800

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Maximum Temperature: Mechanical, °C 1100
1000
Melting Completion (Liquidus), °C 1410
1370
Melting Onset (Solidus), °C 1370
1320
Specific Heat Capacity, J/kg-K 490
470
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 17
75
Density, g/cm3 7.7
8.3
Embodied Carbon, kg CO2/kg material 3.1
10
Embodied Energy, MJ/kg 45
140
Embodied Water, L/kg 180
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44
120
Resilience: Unit (Modulus of Resilience), kJ/m3 180
1610
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
23
Strength to Weight: Axial, points 21
40
Strength to Weight: Bending, points 20
30
Thermal Shock Resistance, points 19
34

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0 to 0.5
0 to 0.15
Chromium (Cr), % 26 to 30
15 to 20
Cobalt (Co), % 0
13 to 20
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 58.4 to 70
0 to 4.0
Manganese (Mn), % 0 to 1.5
0 to 0.75
Molybdenum (Mo), % 0 to 0.5
3.0 to 5.0
Nickel (Ni), % 4.0 to 7.0
42.7 to 64
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 2.0
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
2.5 to 3.3