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ASTM Grade HI Steel vs. Grade M30C Nickel

ASTM grade HI steel belongs to the iron alloys classification, while grade M30C nickel belongs to the nickel alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HI steel and the bottom bar is grade M30C nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
160
Elongation at Break, % 11
29
Fatigue Strength, MPa 150
170
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 79
61
Tensile Strength: Ultimate (UTS), MPa 550
510
Tensile Strength: Yield (Proof), MPa 270
250

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Mechanical, °C 1100
900
Melting Completion (Liquidus), °C 1400
1290
Melting Onset (Solidus), °C 1350
1240
Specific Heat Capacity, J/kg-K 490
430
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 23
60
Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 4.1
9.5
Embodied Energy, MJ/kg 59
140
Embodied Water, L/kg 200
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
120
Resilience: Unit (Modulus of Resilience), kJ/m3 180
200
Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 20
16
Strength to Weight: Bending, points 19
16
Thermal Diffusivity, mm2/s 3.9
5.7
Thermal Shock Resistance, points 12
18

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.3
Chromium (Cr), % 26 to 30
0
Copper (Cu), % 0
26 to 33
Iron (Fe), % 46.9 to 59.8
0 to 3.5
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 14 to 18
56.6 to 72
Niobium (Nb), % 0
1.0 to 3.0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
1.0 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.030