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SAE-AISI 4130 Steel vs. SAE-AISI 1039 Steel

Both SAE-AISI 4130 steel and SAE-AISI 1039 steel are iron alloys. They have a very high 99% 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 4130 steel and the bottom bar is SAE-AISI 1039 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 300
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 26
14 to 18
Fatigue Strength, MPa 320 to 660
230 to 370
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 340 to 640
380 to 420
Tensile Strength: Ultimate (UTS), MPa 530 to 1040
610 to 690
Tensile Strength: Yield (Proof), MPa 440 to 980
340 to 580

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 43
51
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 50
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 180
88 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 2550
310 to 890
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 37
22 to 24
Strength to Weight: Bending, points 19 to 29
20 to 22
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 16 to 31
19 to 22

Alloy Composition

Carbon (C), % 0.28 to 0.33
0.37 to 0.44
Chromium (Cr), % 0.8 to 1.1
0
Iron (Fe), % 97.3 to 98.2
98.5 to 98.9
Manganese (Mn), % 0.4 to 0.6
0.7 to 1.0
Molybdenum (Mo), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0 to 0.050

Comparable Variants