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EN 1.4003 Stainless Steel vs. EN 1.4406 Stainless Steel

Both EN 1.4003 stainless steel and EN 1.4406 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 1.4003 stainless steel and the bottom bar is EN 1.4406 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
220
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
42
Fatigue Strength, MPa 210
280
Impact Strength: V-Notched Charpy, J 67
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Shear Strength, MPa 340
470
Tensile Strength: Ultimate (UTS), MPa 540
680
Tensile Strength: Yield (Proof), MPa 320
320

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 720
950
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
18
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.9
3.7
Embodied Energy, MJ/kg 27
51
Embodied Water, L/kg 97
150

Common Calculations

PREN (Pitting Resistance) 12
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
240
Resilience: Unit (Modulus of Resilience), kJ/m3 260
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 10.5 to 12.5
16.5 to 18.5
Iron (Fe), % 83.9 to 89.2
63.2 to 71.4
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 0.3 to 1.0
10 to 12.5
Nitrogen (N), % 0 to 0.030
0.12 to 0.22
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 0.015