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SAE-AISI 4621 Steel vs. EN 1.4432 Stainless Steel

Both SAE-AISI 4621 steel and EN 1.4432 stainless 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 (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4621 steel and the bottom bar is EN 1.4432 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 27
44
Fatigue Strength, MPa 270
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 320
420
Tensile Strength: Ultimate (UTS), MPa 500
610
Tensile Strength: Yield (Proof), MPa 360
250

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 410
960
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 3.3
19
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.6
3.9
Embodied Energy, MJ/kg 22
54
Embodied Water, L/kg 50
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 340
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
21
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0.18 to 0.23
0 to 0.030
Chromium (Cr), % 0
16.5 to 18.5
Iron (Fe), % 96.1 to 97.1
62.3 to 70.5
Manganese (Mn), % 0.7 to 0.9
0 to 2.0
Molybdenum (Mo), % 0.2 to 0.3
2.5 to 3.0
Nickel (Ni), % 1.7 to 2.0
10.5 to 13
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015