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ASTM A182 Grade F911 vs. SAE-AISI 4340 Steel

Both ASTM A182 grade F911 and SAE-AISI 4340 steel are iron alloys. They have 90% of their average alloy composition in common. There are 31 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 ASTM A182 grade F911 and the bottom bar is SAE-AISI 4340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
210 to 360
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
12 to 22
Fatigue Strength, MPa 350
330 to 740
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 430
430 to 770
Tensile Strength: Ultimate (UTS), MPa 690
690 to 1280
Tensile Strength: Yield (Proof), MPa 500
470 to 1150

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
430
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1440
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
3.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.7
Embodied Energy, MJ/kg 40
22
Embodied Water, L/kg 90
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
79 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 650
590 to 3490
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
24 to 45
Strength to Weight: Bending, points 22
22 to 33
Thermal Diffusivity, mm2/s 6.9
12
Thermal Shock Resistance, points 19
20 to 38

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.00030 to 0.0060
0
Carbon (C), % 0.090 to 0.13
0.38 to 0.43
Chromium (Cr), % 8.5 to 9.5
0.7 to 0.9
Iron (Fe), % 86.2 to 88.9
95.1 to 96.3
Manganese (Mn), % 0.3 to 0.6
0.6 to 0.8
Molybdenum (Mo), % 0.9 to 1.1
0.2 to 0.3
Nickel (Ni), % 0 to 0.4
1.7 to 2.0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.040 to 0.090
0
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0.1 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0.9 to 1.1
0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0