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SAE-AISI 4621 Steel vs. EN 1.4313 Stainless Steel

Both SAE-AISI 4621 steel and EN 1.4313 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 1.4313 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 27
12 to 17
Fatigue Strength, MPa 270
340 to 510
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 320
460 to 600
Tensile Strength: Ultimate (UTS), MPa 500
750 to 1000
Tensile Strength: Yield (Proof), MPa 360
580 to 910

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 410
780
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 46
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.3
10
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
2.4
Embodied Energy, MJ/kg 22
34
Embodied Water, L/kg 50
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 340
870 to 2100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
27 to 36
Strength to Weight: Bending, points 18
23 to 28
Thermal Diffusivity, mm2/s 12
6.7
Thermal Shock Resistance, points 15
27 to 36

Alloy Composition

Carbon (C), % 0.18 to 0.23
0 to 0.050
Chromium (Cr), % 0
12 to 14
Iron (Fe), % 96.1 to 97.1
78.5 to 84.2
Manganese (Mn), % 0.7 to 0.9
0 to 1.5
Molybdenum (Mo), % 0.2 to 0.3
0.3 to 0.7
Nickel (Ni), % 1.7 to 2.0
3.5 to 4.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 0.7
Sulfur (S), % 0 to 0.040
0 to 0.015