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SAE-AISI 1025 Steel vs. AISI 418 Stainless Steel

Both SAE-AISI 1025 steel and AISI 418 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1025 steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 28
17
Fatigue Strength, MPa 190 to 280
520
Poisson's Ratio 0.29
0.28
Reduction in Area, % 45 to 57
50
Shear Modulus, GPa 73
77
Shear Strength, MPa 290 to 310
680
Tensile Strength: Ultimate (UTS), MPa 450 to 500
1100
Tensile Strength: Yield (Proof), MPa 250 to 420
850

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
770
Melting Completion (Liquidus), °C 1460
1500
Melting Onset (Solidus), °C 1420
1460
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.4
2.9
Embodied Energy, MJ/kg 18
41
Embodied Water, L/kg 45
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 110
170
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 470
1830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
38
Strength to Weight: Bending, points 17 to 18
29
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 14 to 16
40

Alloy Composition

Carbon (C), % 0.22 to 0.28
0.15 to 0.2
Chromium (Cr), % 0
12 to 14
Iron (Fe), % 99.03 to 99.48
78.5 to 83.6
Manganese (Mn), % 0.3 to 0.6
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0 to 0.050
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5