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EN 1.4406 Stainless Steel vs. EN 1.4618 Stainless Steel

Both EN 1.4406 stainless steel and EN 1.4618 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4406 stainless steel and the bottom bar is EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 42
51
Fatigue Strength, MPa 280
240 to 250
Impact Strength: V-Notched Charpy, J 90
90 to 91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 470
480 to 500
Tensile Strength: Ultimate (UTS), MPa 680
680 to 700
Tensile Strength: Yield (Proof), MPa 320
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 950
900
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 18
13
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.7
2.7
Embodied Energy, MJ/kg 51
39
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 28
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 260
160 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
24 to 25
Strength to Weight: Bending, points 22
22 to 23
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 15
15 to 16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 16.5 to 18.5
16.5 to 18.5
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 63.2 to 71.4
62.7 to 72.5
Manganese (Mn), % 0 to 2.0
5.5 to 9.5
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 12.5
4.5 to 5.5
Nitrogen (N), % 0.12 to 0.22
0 to 0.15
Phosphorus (P), % 0 to 0.045
0 to 0.070
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010