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SAE-AISI 8740 Steel vs. ASTM A182 Grade F36

Both SAE-AISI 8740 steel and ASTM A182 grade F36 are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is ASTM A182 grade F36.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
17
Fatigue Strength, MPa 270 to 350
330
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 370 to 400
440
Tensile Strength: Ultimate (UTS), MPa 580 to 670
710
Tensile Strength: Yield (Proof), MPa 380 to 570
490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
410
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
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
3.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.7
Embodied Energy, MJ/kg 20
22
Embodied Water, L/kg 50
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 24
25
Strength to Weight: Bending, points 20 to 22
22
Thermal Diffusivity, mm2/s 10
10
Thermal Shock Resistance, points 17 to 20
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Carbon (C), % 0.38 to 0.43
0.1 to 0.17
Chromium (Cr), % 0.4 to 0.6
0 to 0.3
Copper (Cu), % 0
0.5 to 0.8
Iron (Fe), % 96.5 to 97.7
95 to 97.1
Manganese (Mn), % 0.75 to 1.0
0.8 to 1.2
Molybdenum (Mo), % 0.2 to 0.3
0.25 to 0.5
Nickel (Ni), % 0.4 to 0.7
1.0 to 1.3
Niobium (Nb), % 0
0.015 to 0.045
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0.25 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.025
Vanadium (V), % 0
0 to 0.020