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N08031 Stainless Steel vs. S31655 Stainless Steel

Both N08031 stainless steel and S31655 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 65% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is N08031 stainless steel and the bottom bar is S31655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 45
39
Fatigue Strength, MPa 290
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
78
Shear Strength, MPa 510
490
Tensile Strength: Ultimate (UTS), MPa 730
710
Tensile Strength: Yield (Proof), MPa 310
350

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 460
430
Maximum Temperature: Mechanical, °C 1100
1010
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 18
16

Otherwise Unclassified Properties

Base Metal Price, % relative 39
17
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 7.1
3.3
Embodied Energy, MJ/kg 96
46
Embodied Water, L/kg 240
160

Common Calculations

PREN (Pitting Resistance) 52
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
230
Resilience: Unit (Modulus of Resilience), kJ/m3 230
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25
25
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 3.1
4.0
Thermal Shock Resistance, points 14
16

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.030
Chromium (Cr), % 26 to 28
19.5 to 21.5
Copper (Cu), % 1.0 to 1.4
0 to 1.0
Iron (Fe), % 29 to 36.9
63.2 to 71.9
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 6.0 to 7.0
0.5 to 1.5
Nickel (Ni), % 30 to 32
8.0 to 9.5
Nitrogen (N), % 0.15 to 0.25
0.14 to 0.25
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015