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EN 1.4618 Stainless Steel vs. EN 1.4424 Stainless Steel

Both EN 1.4618 stainless steel and EN 1.4424 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4618 stainless steel and the bottom bar is EN 1.4424 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
28
Fatigue Strength, MPa 240 to 250
350 to 370
Impact Strength: V-Notched Charpy, J 90 to 91
90 to 91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 480 to 500
520
Tensile Strength: Ultimate (UTS), MPa 680 to 700
800
Tensile Strength: Yield (Proof), MPa 250 to 260
480 to 500

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 900
960
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1360
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
15
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.7
3.4
Embodied Energy, MJ/kg 39
46
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 19
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
190 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
580 to 640
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 25
29
Strength to Weight: Bending, points 22 to 23
25
Thermal Diffusivity, mm2/s 4.0
3.5
Thermal Shock Resistance, points 15 to 16
23

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 16.5 to 18.5
18 to 19
Copper (Cu), % 1.0 to 2.5
0
Iron (Fe), % 62.7 to 72.5
68.6 to 72.4
Manganese (Mn), % 5.5 to 9.5
1.2 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 4.5 to 5.5
4.5 to 5.2
Nitrogen (N), % 0 to 0.15
0.050 to 0.1
Phosphorus (P), % 0 to 0.070
0 to 0.035
Silicon (Si), % 0 to 1.0
1.4 to 2.0
Sulfur (S), % 0 to 0.010
0 to 0.015

Comparable Variants