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SAE-AISI 4320 Steel vs. Grade M30C Nickel

SAE-AISI 4320 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 (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4320 steel and the bottom bar is grade M30C nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
160
Elongation at Break, % 21 to 29
29
Fatigue Strength, MPa 320
170
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
61
Tensile Strength: Ultimate (UTS), MPa 570 to 790
510
Tensile Strength: Yield (Proof), MPa 430 to 460
250

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
900
Melting Completion (Liquidus), °C 1460
1290
Melting Onset (Solidus), °C 1420
1240
Specific Heat Capacity, J/kg-K 470
430
Thermal Conductivity, W/m-K 46
22
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
60
Density, g/cm3 7.9
8.8
Embodied Carbon, kg CO2/kg material 1.7
9.5
Embodied Energy, MJ/kg 22
140
Embodied Water, L/kg 52
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
120
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 560
200
Stiffness to Weight: Axial, points 13
10
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 20 to 28
16
Strength to Weight: Bending, points 19 to 24
16
Thermal Diffusivity, mm2/s 13
5.7
Thermal Shock Resistance, points 19 to 27
18

Alloy Composition

Carbon (C), % 0.17 to 0.22
0 to 0.3
Chromium (Cr), % 0.4 to 0.6
0
Copper (Cu), % 0
26 to 33
Iron (Fe), % 95.8 to 97
0 to 3.5
Manganese (Mn), % 0.45 to 0.65
0 to 1.5
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 1.7 to 2.0
56.6 to 72
Niobium (Nb), % 0
1.0 to 3.0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
1.0 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.030