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EN 1.4404 Stainless Steel vs. AISI 329 Stainless Steel

Both EN 1.4404 stainless steel and AISI 329 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4404 stainless steel and the bottom bar is AISI 329 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
240
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 43
17
Fatigue Strength, MPa 220 to 320
330
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
80
Shear Strength, MPa 420 to 550
440
Tensile Strength: Ultimate (UTS), MPa 600 to 900
710
Tensile Strength: Yield (Proof), MPa 240 to 570
540

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 950
1100
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
16
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.8
3.1
Embodied Energy, MJ/kg 52
44
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 26
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 210
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
730
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 32
25
Strength to Weight: Bending, points 20 to 26
23
Thermal Diffusivity, mm2/s 4.0
4.3
Thermal Shock Resistance, points 13 to 20
19

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 16.5 to 18.5
23 to 28
Iron (Fe), % 62.8 to 71.5
63.1 to 74
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.0 to 2.5
1.0 to 2.0
Nickel (Ni), % 10 to 13
2.0 to 5.0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030