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EN 1.4415 Stainless Steel vs. EN 1.4550 Stainless Steel

Both EN 1.4415 stainless steel and EN 1.4550 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 33 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 1.4550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 20
42
Fatigue Strength, MPa 470 to 510
210
Impact Strength: V-Notched Charpy, J 91 to 110
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 520 to 570
430
Tensile Strength: Ultimate (UTS), MPa 830 to 930
620
Tensile Strength: Yield (Proof), MPa 730 to 840
230

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
480
Maximum Temperature: Mechanical, °C 790
940
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 19
15
Thermal Expansion, µm/m-K 9.9
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
18
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.6
3.6
Embodied Energy, MJ/kg 51
51
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 160
210
Resilience: Unit (Modulus of Resilience), kJ/m3 1350 to 1790
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 33
22
Strength to Weight: Bending, points 25 to 27
21
Thermal Diffusivity, mm2/s 5.1
4.0
Thermal Shock Resistance, points 30 to 34
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 11.5 to 13.5
17 to 19
Iron (Fe), % 75.9 to 82.4
64.9 to 74
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 1.5 to 2.5
0
Nickel (Ni), % 4.5 to 6.5
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.1 to 0.5
0