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EN 1.4347 Stainless Steel vs. AISI 444 Stainless Steel

Both EN 1.4347 stainless steel and AISI 444 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 31 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 EN 1.4347 stainless steel and the bottom bar is AISI 444 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
23
Fatigue Strength, MPa 320
210
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 660
470
Tensile Strength: Yield (Proof), MPa 480
310

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
580
Maximum Temperature: Mechanical, °C 1100
930
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 15
23
Thermal Expansion, µm/m-K 13
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 16
15
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.1
3.4
Embodied Energy, MJ/kg 44
47
Embodied Water, L/kg 170
130

Common Calculations

PREN (Pitting Resistance) 28
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
95
Resilience: Unit (Modulus of Resilience), kJ/m3 570
240
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
17
Strength to Weight: Bending, points 22
17
Thermal Diffusivity, mm2/s 4.0
6.2
Thermal Shock Resistance, points 19
16

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.025
Chromium (Cr), % 25 to 27
17.5 to 19.5
Iron (Fe), % 62.2 to 69.4
73.3 to 80.8
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 5.5 to 7.5
0 to 1.0
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0.1 to 0.2
0 to 0.035
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8