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SAE-AISI 4130 Steel vs. EN 1.4125 Stainless Steel

Both SAE-AISI 4130 steel and EN 1.4125 stainless steel are iron alloys. They have 83% 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 4130 steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 300
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13 to 26
19
Fatigue Strength, MPa 320 to 660
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 340 to 640
500
Tensile Strength: Ultimate (UTS), MPa 530 to 1040
800
Tensile Strength: Yield (Proof), MPa 440 to 980
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 43
15
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.3
Embodied Energy, MJ/kg 20
32
Embodied Water, L/kg 50
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 180
130
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 2550
570
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19 to 37
29
Strength to Weight: Bending, points 19 to 29
25
Thermal Diffusivity, mm2/s 12
4.1
Thermal Shock Resistance, points 16 to 31
29

Alloy Composition

Carbon (C), % 0.28 to 0.33
1.0 to 1.2
Chromium (Cr), % 0.8 to 1.1
16 to 18
Iron (Fe), % 97.3 to 98.2
78 to 82.7
Manganese (Mn), % 0.4 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.25
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