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EN 1.4818 Stainless Steel vs. EN 1.4521 Stainless Steel

Both EN 1.4818 stainless steel and EN 1.4521 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4818 stainless steel and the bottom bar is EN 1.4521 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
23
Fatigue Strength, MPa 280
230
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 480
330
Tensile Strength: Ultimate (UTS), MPa 700
520
Tensile Strength: Yield (Proof), MPa 330
340

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 420
500
Maximum Temperature: Mechanical, °C 1050
930
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
23
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 16
12
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.1
2.8
Embodied Energy, MJ/kg 44
39
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 22
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
100
Resilience: Unit (Modulus of Resilience), kJ/m3 270
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 4.5
6.2
Thermal Shock Resistance, points 15
18

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.025
Cerium (Ce), % 0.030 to 0.080
0
Chromium (Cr), % 18 to 20
17 to 20
Iron (Fe), % 65.6 to 71.8
74.6 to 81.1
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 9.0 to 11
0
Nitrogen (N), % 0.12 to 0.2
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 1.0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.8