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EN 1.4539 Stainless Steel vs. EN 1.4446 Stainless Steel

Both EN 1.4539 stainless steel and EN 1.4446 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 84% 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 1.4539 stainless steel and the bottom bar is EN 1.4446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 38
23
Fatigue Strength, MPa 220
160
Impact Strength: V-Notched Charpy, J 90
56
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
79
Tensile Strength: Ultimate (UTS), MPa 630
490
Tensile Strength: Yield (Proof), MPa 260
240

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
14
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 31
22
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 5.7
4.5
Embodied Energy, MJ/kg 78
60
Embodied Water, L/kg 200
160

Common Calculations

PREN (Pitting Resistance) 36
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
93
Resilience: Unit (Modulus of Resilience), kJ/m3 160
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
17
Strength to Weight: Bending, points 20
17
Thermal Diffusivity, mm2/s 3.2
3.6
Thermal Shock Resistance, points 14
11

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.030
Chromium (Cr), % 19 to 21
16.5 to 18.5
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 43.1 to 51.8
59.7 to 66.9
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 4.0 to 5.0
4.0 to 4.5
Nickel (Ni), % 24 to 26
12.5 to 14.5
Nitrogen (N), % 0 to 0.15
0.12 to 0.22
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030