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EN 1.4903 Stainless Steel vs. EN 1.4424 Stainless Steel

Both EN 1.4903 stainless steel and EN 1.4424 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4903 stainless steel and the bottom bar is EN 1.4424 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
28
Fatigue Strength, MPa 320 to 330
350 to 370
Impact Strength: V-Notched Charpy, J 42 to 46
90 to 91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Shear Strength, MPa 420
520
Tensile Strength: Ultimate (UTS), MPa 670 to 680
800
Tensile Strength: Yield (Proof), MPa 500
480 to 500

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Corrosion, °C 380
420
Maximum Temperature: Mechanical, °C 650
960
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
13
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.6
3.4
Embodied Energy, MJ/kg 36
46
Embodied Water, L/kg 88
140

Common Calculations

PREN (Pitting Resistance) 13
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
190 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 650
580 to 640
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
29
Strength to Weight: Bending, points 22
25
Thermal Diffusivity, mm2/s 7.0
3.5
Thermal Shock Resistance, points 23
23

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.080 to 0.12
0 to 0.030
Chromium (Cr), % 8.0 to 9.5
18 to 19
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.1 to 90.5
68.6 to 72.4
Manganese (Mn), % 0.3 to 0.6
1.2 to 2.0
Molybdenum (Mo), % 0.85 to 1.1
2.5 to 3.0
Nickel (Ni), % 0 to 0.4
4.5 to 5.2
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0.050 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
1.4 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.18 to 0.25
0