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S32808 Stainless Steel vs. S31655 Stainless Steel

Both S32808 stainless steel and S31655 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. 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 S32808 stainless steel and the bottom bar is S31655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
210
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
39
Fatigue Strength, MPa 350
300
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
78
Shear Strength, MPa 480
490
Tensile Strength: Ultimate (UTS), MPa 780
710
Tensile Strength: Yield (Proof), MPa 570
350

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
430
Maximum Temperature: Mechanical, °C 1100
1010
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 24
17
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.0
3.3
Embodied Energy, MJ/kg 57
46
Embodied Water, L/kg 180
160

Common Calculations

PREN (Pitting Resistance) 40
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
230
Resilience: Unit (Modulus of Resilience), kJ/m3 790
310
Stiffness to Weight: Axial, points 14
14
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
4.0
Thermal Shock Resistance, points 21
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 27 to 27.9
19.5 to 21.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 58.1 to 62.8
63.2 to 71.9
Manganese (Mn), % 0 to 1.1
0 to 2.0
Molybdenum (Mo), % 0.8 to 1.2
0.5 to 1.5
Nickel (Ni), % 7.0 to 8.2
8.0 to 9.5
Nitrogen (N), % 0.3 to 0.4
0.14 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Tungsten (W), % 2.1 to 2.5
0