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S31727 Stainless Steel vs. S32550 Stainless Steel

Both S31727 stainless steel and S32550 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is S32550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
21
Fatigue Strength, MPa 240
400
Poisson's Ratio 0.28
0.27
Reduction in Area, % 56
57
Shear Modulus, GPa 78
80
Shear Strength, MPa 430
540
Tensile Strength: Ultimate (UTS), MPa 630
860
Tensile Strength: Yield (Proof), MPa 270
620

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 24
20
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.7
3.8
Embodied Energy, MJ/kg 64
53
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 35
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
160
Resilience: Unit (Modulus of Resilience), kJ/m3 190
940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
31
Strength to Weight: Bending, points 20
26
Thermal Shock Resistance, points 14
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.040
Chromium (Cr), % 17.5 to 19
24 to 27
Copper (Cu), % 2.8 to 4.0
1.5 to 2.5
Iron (Fe), % 53.7 to 61.3
57.2 to 67
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 3.8 to 4.5
2.9 to 3.9
Nickel (Ni), % 14.5 to 16.5
4.5 to 6.5
Nitrogen (N), % 0.15 to 0.21
0.1 to 0.25
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