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EN 1.4404 Stainless Steel vs. EN 1.4008 Stainless Steel

Both EN 1.4404 stainless steel and EN 1.4008 stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4404 stainless steel and the bottom bar is EN 1.4008 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14 to 43
17
Fatigue Strength, MPa 220 to 320
300
Impact Strength: V-Notched Charpy, J 91 to 93
31
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 600 to 900
670
Tensile Strength: Yield (Proof), MPa 240 to 570
500

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 950
760
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 16
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 19
8.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.8
2.1
Embodied Energy, MJ/kg 52
30
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 26
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 210
100
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 32
24
Strength to Weight: Bending, points 20 to 26
22
Thermal Diffusivity, mm2/s 4.0
6.7
Thermal Shock Resistance, points 13 to 20
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 16.5 to 18.5
12 to 13.5
Iron (Fe), % 62.8 to 71.5
81.8 to 86.8
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.0 to 2.5
0.2 to 0.5
Nickel (Ni), % 10 to 13
1.0 to 2.0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025