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AISI 440A Stainless Steel vs. Grade VDC Steel

Both AISI 440A stainless steel and grade VDC steel are iron alloys. They have 82% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is grade VDC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
1700

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 760
400
Melting Completion (Liquidus), °C 1480
1450
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 23
51
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.4
Embodied Energy, MJ/kg 31
19
Embodied Water, L/kg 120
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26 to 65
60
Strength to Weight: Bending, points 23 to 43
40
Thermal Diffusivity, mm2/s 6.2
14
Thermal Shock Resistance, points 26 to 65
50

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.6 to 0.75
Chromium (Cr), % 16 to 18
0 to 0.3
Copper (Cu), % 0
0 to 0.060
Iron (Fe), % 78.4 to 83.4
98.3 to 99.35
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0 to 0.75
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.3
Sulfur (S), % 0 to 0.015
0 to 0.020