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S43940 Stainless Steel vs. S32550 Stainless Steel

Both S43940 stainless steel and S32550 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 81% 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 S43940 stainless steel and the bottom bar is S32550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 21
21
Fatigue Strength, MPa 180
400
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Shear Strength, MPa 310
540
Tensile Strength: Ultimate (UTS), MPa 490
860
Tensile Strength: Yield (Proof), MPa 280
620

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 540
450
Maximum Temperature: Mechanical, °C 890
1100
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
16
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.6
3.8
Embodied Energy, MJ/kg 38
53
Embodied Water, L/kg 120
180

Common Calculations

PREN (Pitting Resistance) 18
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
160
Resilience: Unit (Modulus of Resilience), kJ/m3 200
940
Stiffness to Weight: Axial, points 14
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 6.8
4.4
Thermal Shock Resistance, points 18
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.040
Chromium (Cr), % 17.5 to 18.5
24 to 27
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 78.2 to 82.1
57.2 to 67
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0
2.9 to 3.9
Nickel (Ni), % 0
4.5 to 6.5
Niobium (Nb), % 0.3 to 0.6
0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0.1 to 0.6
0