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S44725 Stainless Steel vs. S32550 Stainless Steel

Both S44725 stainless steel and S32550 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 90% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S44725 stainless steel and the bottom bar is S32550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
21
Fatigue Strength, MPa 210
400
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 81
80
Shear Strength, MPa 320
540
Tensile Strength: Ultimate (UTS), MPa 500
860
Tensile Strength: Yield (Proof), MPa 310
620

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 500
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.8
Embodied Energy, MJ/kg 44
53
Embodied Water, L/kg 170
180

Common Calculations

PREN (Pitting Resistance) 33
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
160
Resilience: Unit (Modulus of Resilience), kJ/m3 240
940
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
31
Strength to Weight: Bending, points 18
26
Thermal Diffusivity, mm2/s 4.6
4.4
Thermal Shock Resistance, points 16
23

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.040
Chromium (Cr), % 25 to 28.5
24 to 27
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 67.6 to 73.5
57.2 to 67
Manganese (Mn), % 0 to 0.4
0 to 1.5
Molybdenum (Mo), % 1.5 to 2.5
2.9 to 3.9
Nickel (Ni), % 0 to 0.3
4.5 to 6.5
Niobium (Nb), % 0 to 0.26
0
Nitrogen (N), % 0 to 0.018
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.040
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0 to 0.26
0