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S31727 Stainless Steel vs. N08320 Stainless Steel

Both S31727 stainless steel and N08320 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is N08320 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
40
Fatigue Strength, MPa 240
190
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 83
84
Shear Modulus, GPa 78
78
Shear Strength, MPa 430
400
Tensile Strength: Ultimate (UTS), MPa 630
580
Tensile Strength: Yield (Proof), MPa 270
220

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 420
430
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1390
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 24
28
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 4.7
4.9
Embodied Energy, MJ/kg 64
69
Embodied Water, L/kg 180
200

Common Calculations

PREN (Pitting Resistance) 35
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
180
Resilience: Unit (Modulus of Resilience), kJ/m3 190
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
20
Strength to Weight: Bending, points 20
20
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 17.5 to 19
21 to 23
Copper (Cu), % 2.8 to 4.0
0
Iron (Fe), % 53.7 to 61.3
40.4 to 50
Manganese (Mn), % 0 to 1.0
0 to 2.5
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
25 to 27
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030