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SAE-AISI 1141 Steel vs. Grade 12 Titanium

SAE-AISI 1141 steel belongs to the iron alloys classification, while grade 12 titanium belongs to the titanium alloys.

For each property being compared, the top bar is SAE-AISI 1141 steel and the bottom bar is grade 12 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 220
170
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 11 to 17
21
Fatigue Strength, MPa 270 to 430
280
Poisson's Ratio 0.29
0.32
Reduction in Area, % 34 to 39
28
Shear Modulus, GPa 72
39
Shear Strength, MPa 460 to 480
330
Tensile Strength: Ultimate (UTS), MPa 740 to 810
530
Tensile Strength: Yield (Proof), MPa 400 to 700
410

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Maximum Temperature: Mechanical, °C 400
320
Melting Completion (Liquidus), °C 1460
1660
Melting Onset (Solidus), °C 1420
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 51
21
Thermal Expansion, µm/m-K 12
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 12
6.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.4
31
Embodied Energy, MJ/kg 19
500
Embodied Water, L/kg 47
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 430 to 1290
770
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 26 to 29
32
Strength to Weight: Bending, points 23 to 25
32
Thermal Diffusivity, mm2/s 14
8.5
Thermal Shock Resistance, points 24 to 26
37

Alloy Composition


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Carbon (C), % 0.37 to 0.45
0 to 0.080
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 97.7 to 98.2
0 to 0.3
Manganese (Mn), % 1.4 to 1.7
0
Molybdenum (Mo), % 0
0.2 to 0.4
Nickel (Ni), % 0
0.6 to 0.9
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Sulfur (S), % 0.080 to 0.13
0
Titanium (Ti), % 0
97.6 to 99.2
Residuals, % 0
0 to 0.4