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S31727 Stainless Steel vs. AISI 308L Stainless Steel

Both S31727 stainless steel and AISI 308L stainless steel are iron alloys. Both are furnished in the annealed condition. They have 87% 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 AISI 308L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
34
Fatigue Strength, MPa 240
180
Poisson's Ratio 0.28
0.28
Reduction in Area, % 56
46
Shear Modulus, GPa 78
78
Shear Strength, MPa 430
380
Tensile Strength: Ultimate (UTS), MPa 630
580
Tensile Strength: Yield (Proof), MPa 270
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 420
430
Maximum Temperature: Mechanical, °C 1010
1010
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 24
16
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.7
3.2
Embodied Energy, MJ/kg 64
45
Embodied Water, L/kg 180
160

Common Calculations

PREN (Pitting Resistance) 35
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
160
Resilience: Unit (Modulus of Resilience), kJ/m3 190
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
21
Strength to Weight: Bending, points 20
20
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17.5 to 19
19.5 to 22
Copper (Cu), % 2.8 to 4.0
0
Iron (Fe), % 53.7 to 61.3
63.8 to 70.5
Manganese (Mn), % 0 to 1.0
1.0 to 2.5
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
9.0 to 11
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 1.0
0.25 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030