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EN 1.4740 Stainless Steel vs. EN 1.4821 Stainless Steel

Both EN 1.4740 stainless steel and EN 1.4821 stainless steel are iron alloys. They have 87% 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 EN 1.4740 stainless steel and the bottom bar is EN 1.4821 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
18
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1370
1370
Specific Heat Capacity, J/kg-K 490
490
Thermal Conductivity, W/m-K 18
17
Thermal Expansion, µm/m-K 10
12

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
15
Density, g/cm3 7.6
7.6
Embodied Carbon, kg CO2/kg material 2.3
2.9
Embodied Energy, MJ/kg 32
41
Embodied Water, L/kg 120
160

Common Calculations

PREN (Pitting Resistance) 18
26
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
0.1 to 0.2
Chromium (Cr), % 16 to 19
24.5 to 26.5
Iron (Fe), % 75.4 to 82.7
64.2 to 71.1
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
3.5 to 5.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0.8 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.015