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S31655 Stainless Steel vs. S31727 Stainless Steel

Both S31655 stainless steel and S31727 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 S31655 stainless steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
40
Fatigue Strength, MPa 300
240
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 88
83
Shear Modulus, GPa 78
78
Shear Strength, MPa 490
430
Tensile Strength: Ultimate (UTS), MPa 710
630
Tensile Strength: Yield (Proof), MPa 350
270

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 430
420
Maximum Temperature: Mechanical, °C 1010
1010
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 17
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.3
4.7
Embodied Energy, MJ/kg 46
64
Embodied Water, L/kg 160
180

Common Calculations

PREN (Pitting Resistance) 27
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
200
Resilience: Unit (Modulus of Resilience), kJ/m3 310
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
22
Strength to Weight: Bending, points 23
20
Thermal Shock Resistance, points 16
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 19.5 to 21.5
17.5 to 19
Copper (Cu), % 0 to 1.0
2.8 to 4.0
Iron (Fe), % 63.2 to 71.9
53.7 to 61.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0.5 to 1.5
3.8 to 4.5
Nickel (Ni), % 8.0 to 9.5
14.5 to 16.5
Nitrogen (N), % 0.14 to 0.25
0.15 to 0.21
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030