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AISI 329 Stainless Steel vs. S44401 Stainless Steel

Both AISI 329 stainless steel and S44401 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 90% of their average alloy composition in common. There are 32 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 AISI 329 stainless steel and the bottom bar is S44401 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
21
Fatigue Strength, MPa 330
200
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
78
Shear Strength, MPa 440
300
Tensile Strength: Ultimate (UTS), MPa 710
480
Tensile Strength: Yield (Proof), MPa 540
300

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 450
510
Maximum Temperature: Mechanical, °C 1100
930
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
22
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 16
12
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.9
Embodied Energy, MJ/kg 44
40
Embodied Water, L/kg 170
130

Common Calculations

PREN (Pitting Resistance) 30
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
90
Resilience: Unit (Modulus of Resilience), kJ/m3 730
230
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
17
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 4.3
5.9
Thermal Shock Resistance, points 19
17

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.025
Chromium (Cr), % 23 to 28
17.5 to 19.5
Iron (Fe), % 63.1 to 74
75.1 to 80.6
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.0 to 2.0
1.8 to 2.5
Nickel (Ni), % 2.0 to 5.0
0 to 1.0
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8