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EN 1.4418 Stainless Steel vs. EN 1.4821 Stainless Steel

Both EN 1.4418 stainless steel and EN 1.4821 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4418 stainless steel and the bottom bar is EN 1.4821 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 20
18
Fatigue Strength, MPa 350 to 480
280
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79
Shear Strength, MPa 530 to 620
450
Tensile Strength: Ultimate (UTS), MPa 860 to 1000
730
Tensile Strength: Yield (Proof), MPa 540 to 790
450

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 870
1100
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
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 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
15
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 2.8
2.9
Embodied Energy, MJ/kg 39
41
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 20
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
110
Resilience: Unit (Modulus of Resilience), kJ/m3 730 to 1590
500
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 31 to 36
26
Strength to Weight: Bending, points 26 to 28
23
Thermal Diffusivity, mm2/s 4.0
4.6
Thermal Shock Resistance, points 31 to 36
21

Alloy Composition

Carbon (C), % 0 to 0.060
0.1 to 0.2
Chromium (Cr), % 15 to 17
24.5 to 26.5
Iron (Fe), % 73.2 to 80.2
64.2 to 71.1
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0.8 to 1.5
0
Nickel (Ni), % 4.0 to 6.0
3.5 to 5.5
Nitrogen (N), % 0 to 0.020
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.7
0.8 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.015