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EN 1.4417 Stainless Steel vs. EN 1.4008 Stainless Steel

Both EN 1.4417 stainless steel and EN 1.4008 stainless steel are iron alloys. They have 77% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4417 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, % 25
17
Fatigue Strength, MPa 380
300
Impact Strength: V-Notched Charpy, J 56
31
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 730
670
Tensile Strength: Yield (Proof), MPa 550
500

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 1100
760
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 17
25
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 21
8.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.1
2.1
Embodied Energy, MJ/kg 57
30
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 41
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
100
Resilience: Unit (Modulus of Resilience), kJ/m3 730
630
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
24
Strength to Weight: Bending, points 23
22
Thermal Diffusivity, mm2/s 4.6
6.7
Thermal Shock Resistance, points 20
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 24 to 26
12 to 13.5
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 56.7 to 66.9
81.8 to 86.8
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0.2 to 0.5
Nickel (Ni), % 6.0 to 8.5
1.0 to 2.0
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.025
Tungsten (W), % 0 to 1.0
0