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EN 1.4024 Stainless Steel vs. AISI 409 Stainless Steel

Both EN 1.4024 stainless steel and AISI 409 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4024 stainless steel and the bottom bar is AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 15 to 22
24
Fatigue Strength, MPa 220 to 300
140
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
75
Shear Strength, MPa 370 to 460
270
Tensile Strength: Ultimate (UTS), MPa 590 to 750
420
Tensile Strength: Yield (Proof), MPa 330 to 510
200

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 760
710
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
25
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
6.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.0
Embodied Energy, MJ/kg 27
28
Embodied Water, L/kg 100
94

Common Calculations

PREN (Pitting Resistance) 13
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
83
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 660
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 27
15
Strength to Weight: Bending, points 20 to 24
16
Thermal Diffusivity, mm2/s 8.1
6.7
Thermal Shock Resistance, points 21 to 26
15

Alloy Composition

Carbon (C), % 0.12 to 0.17
0 to 0.080
Chromium (Cr), % 12 to 14
10.5 to 11.7
Iron (Fe), % 83.8 to 87.9
84.9 to 89.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.75