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EN 1.4424 Stainless Steel vs. EN 1.4547 Stainless Steel

Both EN 1.4424 stainless steel and EN 1.4547 stainless steel are iron alloys. They have 81% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4424 stainless steel and the bottom bar is EN 1.4547 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 28
39
Fatigue Strength, MPa 350 to 370
290
Impact Strength: V-Notched Charpy, J 90 to 91
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
80
Shear Strength, MPa 520
510
Tensile Strength: Ultimate (UTS), MPa 800
750
Tensile Strength: Yield (Proof), MPa 480 to 500
340

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 960
1090
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 13
14
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
28
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.4
5.6
Embodied Energy, MJ/kg 46
75
Embodied Water, L/kg 140
190

Common Calculations

PREN (Pitting Resistance) 29
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 200
240
Resilience: Unit (Modulus of Resilience), kJ/m3 580 to 640
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
26
Strength to Weight: Bending, points 25
23
Thermal Diffusivity, mm2/s 3.5
3.8
Thermal Shock Resistance, points 23
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 18 to 19
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 68.6 to 72.4
51 to 56.3
Manganese (Mn), % 1.2 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.0
6.0 to 7.0
Nickel (Ni), % 4.5 to 5.2
17.5 to 18.5
Nitrogen (N), % 0.050 to 0.1
0.18 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 1.4 to 2.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.010