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EN 1.4520 Stainless Steel vs. EN 1.4818 Stainless Steel

Both EN 1.4520 stainless steel and EN 1.4818 stainless steel are iron alloys. They have 86% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4520 stainless steel and the bottom bar is EN 1.4818 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 26
40
Fatigue Strength, MPa 160
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 310
480
Tensile Strength: Ultimate (UTS), MPa 480
700
Tensile Strength: Yield (Proof), MPa 220
330

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 500
420
Maximum Temperature: Mechanical, °C 870
1050
Melting Completion (Liquidus), °C 1440
1410
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 20
17
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
16
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.2
3.1
Embodied Energy, MJ/kg 32
44
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 17
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
230
Resilience: Unit (Modulus of Resilience), kJ/m3 120
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
25
Strength to Weight: Bending, points 18
23
Thermal Diffusivity, mm2/s 5.4
4.5
Thermal Shock Resistance, points 17
15

Alloy Composition

Carbon (C), % 0 to 0.025
0.040 to 0.080
Cerium (Ce), % 0
0.030 to 0.080
Chromium (Cr), % 16 to 18
18 to 20
Iron (Fe), % 80.1 to 83.9
65.6 to 71.8
Manganese (Mn), % 0 to 0.5
0 to 1.0
Nickel (Ni), % 0
9.0 to 11
Nitrogen (N), % 0 to 0.015
0.12 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.5
1.0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0.15 to 0.8
0