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EN 1.4361 Stainless Steel vs. SAE-AISI 4140 Steel

Both EN 1.4361 stainless steel and SAE-AISI 4140 steel are iron alloys. They have 64% of their average alloy composition in common. There are 31 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 EN 1.4361 stainless steel and the bottom bar is SAE-AISI 4140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 43
11 to 26
Fatigue Strength, MPa 220
360 to 650
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 440
410 to 660
Tensile Strength: Ultimate (UTS), MPa 630
690 to 1080
Tensile Strength: Yield (Proof), MPa 250
590 to 990

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Maximum Temperature: Mechanical, °C 940
420
Melting Completion (Liquidus), °C 1370
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 14
43
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.4
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.5
Embodied Energy, MJ/kg 52
20
Embodied Water, L/kg 150
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
74 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 160
920 to 2590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
25 to 38
Strength to Weight: Bending, points 21
22 to 30
Thermal Diffusivity, mm2/s 3.7
12
Thermal Shock Resistance, points 15
20 to 32

Alloy Composition

Carbon (C), % 0 to 0.015
0.38 to 0.43
Chromium (Cr), % 16.5 to 18.5
0.8 to 1.1
Iron (Fe), % 58.7 to 65.8
96.8 to 97.8
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.2
0.15 to 0.25
Nickel (Ni), % 14 to 16
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 3.7 to 4.5
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040