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EN 1.4446 Stainless Steel vs. EN 1.4443 Stainless Steel

Both EN 1.4446 stainless steel and EN 1.4443 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4446 stainless steel and the bottom bar is EN 1.4443 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
34
Fatigue Strength, MPa 160
170
Impact Strength: V-Notched Charpy, J 56
67
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 490
490
Tensile Strength: Yield (Proof), MPa 240
210

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 980
1000
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 22
20
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.5
4.0
Embodied Energy, MJ/kg 60
54
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 34
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 3.6
3.9
Thermal Shock Resistance, points 11
11

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 16.5 to 18.5
18 to 20
Iron (Fe), % 59.7 to 66.9
60.4 to 69.5
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 4.0 to 4.5
2.5 to 3.0
Nickel (Ni), % 12.5 to 14.5
10 to 13
Nitrogen (N), % 0.12 to 0.22
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030