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SAE-AISI 4027 Steel vs. S35125 Stainless Steel

Both SAE-AISI 4027 steel and S35125 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 42% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4027 steel and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23
39
Fatigue Strength, MPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 320
370
Tensile Strength: Ultimate (UTS), MPa 500
540
Tensile Strength: Yield (Proof), MPa 260
230

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 49
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
36
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.5
6.4
Embodied Energy, MJ/kg 19
89
Embodied Water, L/kg 47
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 97
170
Resilience: Unit (Modulus of Resilience), kJ/m3 190
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
18
Thermal Diffusivity, mm2/s 13
3.1
Thermal Shock Resistance, points 16
12

Alloy Composition

Carbon (C), % 0.25 to 0.3
0 to 0.1
Chromium (Cr), % 0
20 to 23
Iron (Fe), % 98.1 to 98.7
36.2 to 45.8
Manganese (Mn), % 0.7 to 0.9
1.0 to 1.5
Molybdenum (Mo), % 0.2 to 0.3
2.0 to 3.0
Nickel (Ni), % 0
31 to 35
Niobium (Nb), % 0
0.25 to 0.6
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.015