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SAE-AISI 4718 Steel vs. AWS E630

Both SAE-AISI 4718 steel and AWS E630 are iron alloys. They have 76% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4718 steel and the bottom bar is AWS E630.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 24
8.0
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 510
1040

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
17
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
14
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
2.8
Embodied Energy, MJ/kg 21
40
Embodied Water, L/kg 51
140

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
37
Strength to Weight: Bending, points 18
29
Thermal Diffusivity, mm2/s 10
4.5
Thermal Shock Resistance, points 17
28

Alloy Composition

Carbon (C), % 0.16 to 0.21
0 to 0.050
Chromium (Cr), % 0.35 to 0.55
16 to 16.8
Copper (Cu), % 0
3.3 to 4.0
Iron (Fe), % 96.3 to 97.4
71.6 to 75.9
Manganese (Mn), % 0.7 to 0.9
0.25 to 0.75
Molybdenum (Mo), % 0.3 to 0.4
0 to 0.75
Nickel (Ni), % 0.9 to 1.2
4.5 to 5.0
Niobium (Nb), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030