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SAE-AISI 1025 Steel vs. SAE-AISI 1074 Steel

Both SAE-AISI 1025 steel and SAE-AISI 1074 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1025 steel and the bottom bar is SAE-AISI 1074 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
220 to 250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 28
11 to 14
Fatigue Strength, MPa 190 to 280
290 to 350
Poisson's Ratio 0.29
0.29
Reduction in Area, % 45 to 57
34 to 45
Shear Modulus, GPa 73
72
Shear Strength, MPa 290 to 310
440 to 490
Tensile Strength: Ultimate (UTS), MPa 450 to 500
740 to 820
Tensile Strength: Yield (Proof), MPa 250 to 420
450 to 570

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 52
50
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 45
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 110
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 470
550 to 860
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
26 to 29
Strength to Weight: Bending, points 17 to 18
23 to 25
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 14 to 16
24 to 26

Alloy Composition

Carbon (C), % 0.22 to 0.28
0.7 to 0.8
Iron (Fe), % 99.03 to 99.48
98.3 to 98.8
Manganese (Mn), % 0.3 to 0.6
0.5 to 0.8
Phosphorus (P), % 0 to 0.040
0 to 0.040
Sulfur (S), % 0 to 0.050
0 to 0.050

Comparable Variants