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SAE-AISI 1144 Steel vs. SAE-AISI 1552 Steel

Both SAE-AISI 1144 steel and SAE-AISI 1552 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1144 steel and the bottom bar is SAE-AISI 1552 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
220 to 250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
11 to 14
Fatigue Strength, MPa 280 to 430
290 to 400
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34 to 40
34 to 46
Shear Modulus, GPa 72
72
Shear Strength, MPa 460 to 510
460 to 510
Tensile Strength: Ultimate (UTS), MPa 750 to 840
760 to 840
Tensile Strength: Yield (Proof), MPa 420 to 690
460 to 650

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 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
11
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
12

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
19
Embodied Water, L/kg 47
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 110
81 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 1290
560 to 1130
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 30
27 to 30
Strength to Weight: Bending, points 23 to 25
24 to 25
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 22 to 24
26 to 29

Alloy Composition

Carbon (C), % 0.4 to 0.48
0.47 to 0.55
Iron (Fe), % 97.5 to 98
97.9 to 98.3
Manganese (Mn), % 1.4 to 1.7
1.2 to 1.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Sulfur (S), % 0.24 to 0.33
0 to 0.050

Comparable Variants