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EN 1.4590 Stainless Steel vs. EN 1.4008 Stainless Steel

Both EN 1.4590 stainless steel and EN 1.4008 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 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 1.4590 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, % 26
17
Fatigue Strength, MPa 190
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 480
670
Tensile Strength: Yield (Proof), MPa 270
500

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 470
390
Maximum Temperature: Mechanical, °C 860
760
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
25
Thermal Expansion, µm/m-K 10
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 11
8.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.5
2.1
Embodied Energy, MJ/kg 37
30
Embodied Water, L/kg 120
100

Common Calculations

PREN (Pitting Resistance) 17
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 190
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
24
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 7.0
6.7
Thermal Shock Resistance, points 17
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 16 to 17.5
12 to 13.5
Iron (Fe), % 79.7 to 83.7
81.8 to 86.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0.2 to 0.5
Nickel (Ni), % 0
1.0 to 2.0
Niobium (Nb), % 0.35 to 0.55
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025
Zirconium (Zr), % 0 to 0.15
0