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SAE-AISI 5120 Steel vs. EN 1.4125 Stainless Steel

Both SAE-AISI 5120 steel and EN 1.4125 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 82% of their average alloy composition in common. There are 31 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 5120 steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
19
Fatigue Strength, MPa 210
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 310
500
Tensile Strength: Ultimate (UTS), MPa 500
800
Tensile Strength: Yield (Proof), MPa 320
470

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
870
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 47
15
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.3
Embodied Energy, MJ/kg 19
32
Embodied Water, L/kg 49
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71
130
Resilience: Unit (Modulus of Resilience), kJ/m3 280
570
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
29
Strength to Weight: Bending, points 18
25
Thermal Diffusivity, mm2/s 13
4.1
Thermal Shock Resistance, points 16
29

Alloy Composition

Carbon (C), % 0.17 to 0.22
1.0 to 1.2
Chromium (Cr), % 0.7 to 0.9
16 to 18
Iron (Fe), % 97.6 to 98.3
78 to 82.7
Manganese (Mn), % 0.7 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015