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SAE-AISI 1144 Steel vs. SAE-AISI 1345 Steel

Both SAE-AISI 1144 steel and SAE-AISI 1345 steel are iron alloys. Their average alloy composition is basically identical. 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 1144 steel and the bottom bar is SAE-AISI 1345 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
11 to 23
Fatigue Strength, MPa 280 to 430
230 to 390
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
72
Shear Strength, MPa 460 to 510
370 to 440
Tensile Strength: Ultimate (UTS), MPa 750 to 840
590 to 730
Tensile Strength: Yield (Proof), MPa 420 to 690
330 to 620

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
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 7.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 110
78 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 1290
290 to 1040
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 30
21 to 26
Strength to Weight: Bending, points 23 to 25
20 to 23
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 22 to 24
19 to 23

Alloy Composition

Carbon (C), % 0.4 to 0.48
0.43 to 0.48
Iron (Fe), % 97.5 to 98
97.2 to 97.8
Manganese (Mn), % 1.4 to 1.7
1.6 to 1.9
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0.24 to 0.33
0 to 0.040

Comparable Variants