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SAE-AISI 4145 Steel vs. ASTM A182 Grade F11 Class 2

Both SAE-AISI 4145 steel and ASTM A182 grade F11 class 2 are iron alloys. Both are furnished in the annealed condition. They have a very high 99% of their average alloy composition in common. There are 32 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 4145 steel and the bottom bar is ASTM A182 grade F11 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
22
Fatigue Strength, MPa 240
220
Poisson's Ratio 0.29
0.29
Reduction in Area, % 46
34
Shear Modulus, GPa 73
73
Shear Strength, MPa 360
340
Tensile Strength: Ultimate (UTS), MPa 580
540
Tensile Strength: Yield (Proof), MPa 360
310

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 420
430
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 42
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.6
Embodied Energy, MJ/kg 20
21
Embodied Water, L/kg 51
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
100
Resilience: Unit (Modulus of Resilience), kJ/m3 350
260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
19
Strength to Weight: Bending, points 20
19
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 17
16

Alloy Composition

Carbon (C), % 0.43 to 0.48
0.1 to 0.2
Chromium (Cr), % 0.8 to 1.1
1.0 to 1.5
Iron (Fe), % 96.7 to 97.7
95.8 to 97.7
Manganese (Mn), % 0.75 to 1.0
0.3 to 0.8
Molybdenum (Mo), % 0.15 to 0.25
0.44 to 0.65
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0.5 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.040