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SAE-AISI 1040 Steel vs. SAE-AISI 8637 Steel

Both SAE-AISI 1040 steel and SAE-AISI 8637 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 1040 steel and the bottom bar is SAE-AISI 8637 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 20
23
Fatigue Strength, MPa 220 to 340
260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 350 to 390
340
Tensile Strength: Ultimate (UTS), MPa 570 to 640
540
Tensile Strength: Yield (Proof), MPa 320 to 530
360

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
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 51
38
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
20
Embodied Water, L/kg 46
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 96
110
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 760
340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 23
19
Strength to Weight: Bending, points 19 to 21
19
Thermal Diffusivity, mm2/s 14
10
Thermal Shock Resistance, points 18 to 20
18

Alloy Composition

Carbon (C), % 0.37 to 0.44
0.35 to 0.4
Chromium (Cr), % 0
0.4 to 0.6
Iron (Fe), % 98.6 to 99.03
96.6 to 97.8
Manganese (Mn), % 0.6 to 0.9
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0 to 0.050
0 to 0.040