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S31803 Stainless Steel vs. S32808 Stainless Steel

Both S31803 stainless steel and S32808 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 90% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is S31803 stainless steel and the bottom bar is S32808 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
270
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 29
17
Fatigue Strength, MPa 370
350
Poisson's Ratio 0.27
0.27
Rockwell C Hardness 27
28
Shear Modulus, GPa 80
81
Shear Strength, MPa 460
480
Tensile Strength: Ultimate (UTS), MPa 710
780
Tensile Strength: Yield (Proof), MPa 500
570

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 430
460
Maximum Temperature: Mechanical, °C 1060
1100
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 17
24
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
4.0
Embodied Energy, MJ/kg 49
57
Embodied Water, L/kg 160
180

Common Calculations

PREN (Pitting Resistance) 34
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
120
Resilience: Unit (Modulus of Resilience), kJ/m3 630
790
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
27
Strength to Weight: Bending, points 23
24
Thermal Diffusivity, mm2/s 4.3
3.8
Thermal Shock Resistance, points 20
21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 21 to 23
27 to 27.9
Iron (Fe), % 63.7 to 71.9
58.1 to 62.8
Manganese (Mn), % 0 to 2.0
0 to 1.1
Molybdenum (Mo), % 2.5 to 3.5
0.8 to 1.2
Nickel (Ni), % 4.5 to 6.5
7.0 to 8.2
Nitrogen (N), % 0.080 to 0.2
0.3 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.010
Tungsten (W), % 0
2.1 to 2.5