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S31727 Stainless Steel vs. AISI 314 Stainless Steel

Both S31727 stainless steel and AISI 314 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 86% 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 314 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
45
Fatigue Strength, MPa 240
210
Poisson's Ratio 0.28
0.28
Reduction in Area, % 56
57
Shear Modulus, GPa 78
78
Shear Strength, MPa 430
410
Tensile Strength: Ultimate (UTS), MPa 630
590
Tensile Strength: Yield (Proof), MPa 270
230

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1440
1380
Melting Onset (Solidus), °C 1390
1340
Specific Heat Capacity, J/kg-K 470
490
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 24
25
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 4.7
4.3
Embodied Energy, MJ/kg 64
62
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 35
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
210
Resilience: Unit (Modulus of Resilience), kJ/m3 190
130
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
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.25
Chromium (Cr), % 17.5 to 19
23 to 26
Copper (Cu), % 2.8 to 4.0
0
Iron (Fe), % 53.7 to 61.3
46.7 to 56.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
19 to 22
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 1.0
1.5 to 3.0
Sulfur (S), % 0 to 0.030
0 to 0.030