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EN 1.4740 Stainless Steel vs. AISI 446 Stainless Steel

Both EN 1.4740 stainless steel and AISI 446 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 92% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is EN 1.4740 stainless steel and the bottom bar is AISI 446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
23
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 900
1180
Melting Completion (Liquidus), °C 1420
1510
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 490
490
Thermal Conductivity, W/m-K 18
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.3
2.4
Embodied Energy, MJ/kg 32
35
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 18
27
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Thermal Diffusivity, mm2/s 4.8
4.6

Alloy Composition

Carbon (C), % 0.3 to 0.5
0 to 0.2
Chromium (Cr), % 16 to 19
23 to 27
Iron (Fe), % 75.4 to 82.7
69.2 to 77
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
0 to 0.75
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030