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SAE-AISI 1151 Steel vs. SAE-AISI 1025 Steel

Both SAE-AISI 1151 steel and SAE-AISI 1025 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1151 steel and the bottom bar is SAE-AISI 1025 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 220
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
17 to 28
Fatigue Strength, MPa 260 to 410
190 to 280
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34 to 40
45 to 57
Shear Modulus, GPa 72
73
Shear Strength, MPa 430 to 480
290 to 310
Tensile Strength: Ultimate (UTS), MPa 710 to 800
450 to 500
Tensile Strength: Yield (Proof), MPa 390 to 660
250 to 420

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
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 46
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 100
80 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1170
170 to 470
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 28
16 to 18
Strength to Weight: Bending, points 22 to 24
17 to 18
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 22 to 25
14 to 16

Alloy Composition

Carbon (C), % 0.48 to 0.55
0.22 to 0.28
Iron (Fe), % 98.3 to 98.7
99.03 to 99.48
Manganese (Mn), % 0.7 to 1.0
0.3 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.040
Sulfur (S), % 0.080 to 0.13
0 to 0.050

Comparable Variants