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SAE-AISI 4718 Steel vs. SAE-AISI 1212 Steel

Both SAE-AISI 4718 steel and SAE-AISI 1212 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4718 steel and the bottom bar is SAE-AISI 1212 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
140 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 24
11 to 28
Fatigue Strength, MPa 270
200 to 290
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 330
280 to 370
Tensile Strength: Ultimate (UTS), MPa 510
440 to 620
Tensile Strength: Yield (Proof), MPa 370
260 to 460

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
52
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.4
Embodied Energy, MJ/kg 21
18
Embodied Water, L/kg 51
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
64 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 360
180 to 560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
15 to 22
Strength to Weight: Bending, points 18
16 to 20
Thermal Diffusivity, mm2/s 10
14
Thermal Shock Resistance, points 17
14 to 20

Alloy Composition

Carbon (C), % 0.16 to 0.21
0 to 0.13
Chromium (Cr), % 0.35 to 0.55
0
Iron (Fe), % 96.3 to 97.4
98.5 to 99.07
Manganese (Mn), % 0.7 to 0.9
0.7 to 1.0
Molybdenum (Mo), % 0.3 to 0.4
0
Nickel (Ni), % 0.9 to 1.2
0
Phosphorus (P), % 0 to 0.035
0.070 to 0.12
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0.16 to 0.23