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EN 1.4418 Stainless Steel vs. EN 1.4423 Stainless Steel

Both EN 1.4418 stainless steel and EN 1.4423 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4418 stainless steel and the bottom bar is EN 1.4423 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 20
17
Fatigue Strength, MPa 350 to 480
380
Impact Strength: V-Notched Charpy, J 62 to 90
110
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 530 to 620
520
Tensile Strength: Ultimate (UTS), MPa 860 to 1000
850
Tensile Strength: Yield (Proof), MPa 540 to 790
630

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 870
780
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 10
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 13
14
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
3.2
Embodied Energy, MJ/kg 39
43
Embodied Water, L/kg 130
120

Common Calculations

PREN (Pitting Resistance) 20
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
130
Resilience: Unit (Modulus of Resilience), kJ/m3 730 to 1590
1000
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 36
30
Strength to Weight: Bending, points 26 to 28
25
Thermal Diffusivity, mm2/s 4.0
4.3
Thermal Shock Resistance, points 31 to 36
31

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.020
Chromium (Cr), % 15 to 17
11 to 13
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 73.2 to 80.2
73.8 to 80.5
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0.8 to 1.5
2.3 to 2.8
Nickel (Ni), % 4.0 to 6.0
6.0 to 7.0
Nitrogen (N), % 0 to 0.020
0 to 0.020
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.0030