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EN 1.4415 Stainless Steel vs. EN 1.4421 Stainless Steel

Both EN 1.4415 stainless steel and EN 1.4421 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4415 stainless steel and the bottom bar is EN 1.4421 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 20
11 to 17
Fatigue Strength, MPa 470 to 510
380 to 520
Impact Strength: V-Notched Charpy, J 91 to 110
30 to 67
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 830 to 930
880 to 1100
Tensile Strength: Yield (Proof), MPa 730 to 840
620 to 950

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 790
870
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 19
16
Thermal Expansion, µm/m-K 9.9
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.6
2.6
Embodied Energy, MJ/kg 51
36
Embodied Water, L/kg 120
130

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 160
120 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 1350 to 1790
960 to 2270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 33
31 to 39
Strength to Weight: Bending, points 25 to 27
26 to 30
Thermal Diffusivity, mm2/s 5.1
4.4
Thermal Shock Resistance, points 30 to 34
31 to 39

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.060
Chromium (Cr), % 11.5 to 13.5
15.5 to 17.5
Iron (Fe), % 75.9 to 82.4
74.4 to 80.5
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.5
0 to 0.7
Nickel (Ni), % 4.5 to 6.5
4.0 to 5.5
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.5
0 to 0.8
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.1 to 0.5
0