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EN 1.4821 Stainless Steel vs. SAE-AISI 4140 Steel

Both EN 1.4821 stainless steel and SAE-AISI 4140 steel are iron alloys. They have 70% 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 EN 1.4821 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 200
190
Elongation at Break, % 18
11 to 26
Fatigue Strength, MPa 280
360 to 650
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 450
410 to 660
Tensile Strength: Ultimate (UTS), MPa 730
690 to 1080
Tensile Strength: Yield (Proof), MPa 450
590 to 990

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 17
43
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.4
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.5
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 160
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
74 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 500
920 to 2590
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 26
25 to 38
Strength to Weight: Bending, points 23
22 to 30
Thermal Diffusivity, mm2/s 4.6
12
Thermal Shock Resistance, points 21
20 to 32

Alloy Composition

Carbon (C), % 0.1 to 0.2
0.38 to 0.43
Chromium (Cr), % 24.5 to 26.5
0.8 to 1.1
Iron (Fe), % 64.2 to 71.1
96.8 to 97.8
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 3.5 to 5.5
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0.8 to 1.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040