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SAE-AISI 1141 Steel vs. SAE-AISI 1108 Steel

Both SAE-AISI 1141 steel and SAE-AISI 1108 steel are iron alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI 1141 steel and the bottom bar is SAE-AISI 1108 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 220
110 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
23 to 34
Fatigue Strength, MPa 270 to 430
170 to 260
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34 to 39
45 to 57
Shear Modulus, GPa 72
73
Shear Strength, MPa 460 to 480
250 to 280
Tensile Strength: Ultimate (UTS), MPa 740 to 810
380 to 440
Tensile Strength: Yield (Proof), MPa 400 to 700
220 to 360

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
52
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 47
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 110
95 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 430 to 1290
130 to 340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 29
13 to 16
Strength to Weight: Bending, points 23 to 25
15 to 16
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 24 to 26
12 to 14

Alloy Composition

Carbon (C), % 0.37 to 0.45
0.080 to 0.13
Iron (Fe), % 97.7 to 98.2
98.9 to 99.24
Manganese (Mn), % 1.4 to 1.7
0.6 to 0.8
Phosphorus (P), % 0 to 0.040
0 to 0.040
Sulfur (S), % 0.080 to 0.13
0.080 to 0.13

Comparable Variants