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EN 1.4424 Stainless Steel vs. EN 1.4303 Stainless Steel

Both EN 1.4424 stainless steel and EN 1.4303 stainless steel are iron alloys. They have a moderately high 93% 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 1.4303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
190 to 270
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 28
13 to 49
Fatigue Strength, MPa 350 to 370
220 to 320
Impact Strength: V-Notched Charpy, J 90 to 91
91 to 98
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 520
420 to 540
Tensile Strength: Ultimate (UTS), MPa 800
590 to 900
Tensile Strength: Yield (Proof), MPa 480 to 500
230 to 560

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 960
940
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 15
17
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
3.2
Embodied Energy, MJ/kg 46
46
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 29
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 200
110 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 580 to 640
140 to 800
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
21 to 32
Strength to Weight: Bending, points 25
20 to 26
Thermal Diffusivity, mm2/s 3.5
4.0
Thermal Shock Resistance, points 23
13 to 20

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.060
Chromium (Cr), % 18 to 19
17 to 19
Iron (Fe), % 68.6 to 72.4
64.8 to 72
Manganese (Mn), % 1.2 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 4.5 to 5.2
11 to 13
Nitrogen (N), % 0.050 to 0.1
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 1.4 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015