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S32750 Stainless Steel vs. S32550 Stainless Steel

Both S32750 stainless steel and S32550 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 97% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is S32750 stainless steel and the bottom bar is S32550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
260
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
21
Fatigue Strength, MPa 360
400
Poisson's Ratio 0.27
0.27
Rockwell C Hardness 28
28
Shear Modulus, GPa 81
80
Shear Strength, MPa 530
540
Tensile Strength: Ultimate (UTS), MPa 860
860
Tensile Strength: Yield (Proof), MPa 590
620

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 21
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
3.8
Embodied Energy, MJ/kg 56
53
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 43
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
160
Resilience: Unit (Modulus of Resilience), kJ/m3 860
940
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31
31
Strength to Weight: Bending, points 26
26
Thermal Diffusivity, mm2/s 4.0
4.4
Thermal Shock Resistance, points 25
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.040
Chromium (Cr), % 24 to 26
24 to 27
Copper (Cu), % 0 to 0.5
1.5 to 2.5
Iron (Fe), % 58.1 to 66.8
57.2 to 67
Manganese (Mn), % 0 to 1.2
0 to 1.5
Molybdenum (Mo), % 3.0 to 5.0
2.9 to 3.9
Nickel (Ni), % 6.0 to 8.0
4.5 to 6.5
Nitrogen (N), % 0.24 to 0.32
0.1 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030