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SAE-AISI 1146 Steel vs. SAE-AISI 1038 Steel

Both SAE-AISI 1146 steel and SAE-AISI 1038 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1146 steel and the bottom bar is SAE-AISI 1038 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 17
14 to 20
Fatigue Strength, MPa 240 to 400
220 to 350
Poisson's Ratio 0.29
0.29
Reduction in Area, % 40 to 45
40 to 45
Shear Modulus, GPa 72
73
Shear Strength, MPa 410 to 440
370 to 390
Tensile Strength: Ultimate (UTS), MPa 670 to 730
590 to 640
Tensile Strength: Yield (Proof), MPa 360 to 630
320 to 540

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
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 51
51
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.0

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 97
83 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 340 to 1050
270 to 790
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 26
21 to 23
Strength to Weight: Bending, points 22 to 23
20 to 21
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 20 to 22
19 to 20

Alloy Composition

Carbon (C), % 0.42 to 0.49
0.35 to 0.42
Iron (Fe), % 98.3 to 98.8
98.6 to 99.05
Manganese (Mn), % 0.7 to 1.0
0.6 to 0.9
Phosphorus (P), % 0 to 0.040
0 to 0.040
Sulfur (S), % 0.080 to 0.13
0 to 0.050

Comparable Variants