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S32808 Stainless Steel vs. AISI 329 Stainless Steel

Both S32808 stainless steel and AISI 329 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 91% of their average alloy composition in common.

For each property being compared, the top bar is S32808 stainless steel and the bottom bar is AISI 329 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
240
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
17
Fatigue Strength, MPa 350
330
Poisson's Ratio 0.27
0.27
Rockwell C Hardness 28
24
Shear Modulus, GPa 81
80
Shear Strength, MPa 480
440
Tensile Strength: Ultimate (UTS), MPa 780
710
Tensile Strength: Yield (Proof), MPa 570
540

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 460
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 24
16
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.0
3.1
Embodied Energy, MJ/kg 57
44
Embodied Water, L/kg 180
170

Common Calculations

PREN (Pitting Resistance) 40
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 790
730
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
25
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 3.8
4.3
Thermal Shock Resistance, points 21
19

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 27 to 27.9
23 to 28
Iron (Fe), % 58.1 to 62.8
63.1 to 74
Manganese (Mn), % 0 to 1.1
0 to 1.0
Molybdenum (Mo), % 0.8 to 1.2
1.0 to 2.0
Nickel (Ni), % 7.0 to 8.2
2.0 to 5.0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.030
Tungsten (W), % 2.1 to 2.5
0