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SAE-AISI 1345 Steel vs. SAE-AISI 1044 Steel

Both SAE-AISI 1345 steel and SAE-AISI 1044 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 1345 steel and the bottom bar is SAE-AISI 1044 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
18
Fatigue Strength, MPa 230 to 390
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
72
Shear Strength, MPa 370 to 440
380
Tensile Strength: Ultimate (UTS), MPa 590 to 730
620
Tensile Strength: Yield (Proof), MPa 330 to 620
340

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
51
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 48
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 120
94
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 1040
320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 26
22
Strength to Weight: Bending, points 20 to 23
21
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 19 to 23
20

Alloy Composition

Carbon (C), % 0.43 to 0.48
0.43 to 0.5
Iron (Fe), % 97.2 to 97.8
98.8 to 99.27
Manganese (Mn), % 1.6 to 1.9
0.3 to 0.6
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