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S32750 Stainless Steel vs. AISI 440B Stainless Steel

Both S32750 stainless steel and AISI 440B stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 31 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 S32750 stainless steel and the bottom bar is AISI 440B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
3.0 to 18
Fatigue Strength, MPa 360
260 to 850
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
460 to 1110
Tensile Strength: Ultimate (UTS), MPa 860
740 to 1930
Tensile Strength: Yield (Proof), MPa 590
430 to 1860

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 1100
870
Melting Completion (Liquidus), °C 1450
1480
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
23
Thermal Expansion, µm/m-K 12
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 21
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.1
2.2
Embodied Energy, MJ/kg 56
31
Embodied Water, L/kg 180
120

Common Calculations

PREN (Pitting Resistance) 43
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
57 to 110
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31
27 to 70
Strength to Weight: Bending, points 26
24 to 45
Thermal Diffusivity, mm2/s 4.0
6.1
Thermal Shock Resistance, points 25
27 to 70

Alloy Composition

Carbon (C), % 0 to 0.030
0.75 to 1.0
Chromium (Cr), % 24 to 26
16 to 18
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 58.1 to 66.8
78.2 to 83.3
Manganese (Mn), % 0 to 1.2
0 to 1.0
Molybdenum (Mo), % 3.0 to 5.0
0 to 0.75
Nickel (Ni), % 6.0 to 8.0
0
Nitrogen (N), % 0.24 to 0.32
0
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 0.015