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AISI 440A Stainless Steel vs. S32750 Stainless Steel

Both AISI 440A stainless steel and S32750 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 AISI 440A stainless steel and the bottom bar is S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 5.0 to 20
17
Fatigue Strength, MPa 270 to 790
360
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
81
Shear Strength, MPa 450 to 1040
530
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
860
Tensile Strength: Yield (Proof), MPa 420 to 1650
590

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 400
450
Maximum Temperature: Mechanical, °C 760
1100
Melting Completion (Liquidus), °C 1480
1450
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
15
Thermal Expansion, µm/m-K 10
12

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 18
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
130
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 65
31
Strength to Weight: Bending, points 23 to 43
26
Thermal Diffusivity, mm2/s 6.2
4.0
Thermal Shock Resistance, points 26 to 65
25

Alloy Composition

Carbon (C), % 0.6 to 0.75
0 to 0.030
Chromium (Cr), % 16 to 18
24 to 26
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 78.4 to 83.4
58.1 to 66.8
Manganese (Mn), % 0 to 1.0
0 to 1.2
Molybdenum (Mo), % 0 to 0.75
3.0 to 5.0
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.015
0 to 0.020