EN 1.4590 (X2CrNbZr17) Stainless Steel
EN 1.4590 stainless steel is a ferritic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 1.4590 is the EN numeric designation for this material. X2CrNbZr17 is the EN chemical designation.
It has a fairly high ductility and a moderately high thermal conductivity among wrought ferritic stainless steels.
The graph bars on the material properties cards below compare EN 1.4590 stainless steel to: wrought ferritic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
200 GPa 28 x 106 psi
Elongation at Break
26 %
Fatigue Strength
190 MPa 28 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
77 GPa 11 x 106 psi
Shear Strength
310 MPa 44 x 103 psi
Tensile Strength: Ultimate (UTS)
480 MPa 69 x 103 psi
Tensile Strength: Yield (Proof)
270 MPa 40 x 103 psi
Thermal Properties
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
470 °C 880 °F
Maximum Temperature: Mechanical
860 °C 1580 °F
Melting Completion (Liquidus)
1440 °C 2630 °F
Melting Onset (Solidus)
1400 °C 2550 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
26 W/m-K 15 BTU/h-ft-°F
Thermal Expansion
10 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
3.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
11 % relative
Density
7.7 g/cm3 480 lb/ft3
Embodied Carbon
2.5 kg CO2/kg material
Embodied Energy
37 MJ/kg 16 x 103 BTU/lb
Embodied Water
120 L/kg 14 gal/lb
Common Calculations
PREN (Pitting Resistance)
17
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m3
Resilience: Unit (Modulus of Resilience)
190 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
18 points
Thermal Diffusivity
7.0 mm2/s
Thermal Shock Resistance
17 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4590 stainless steel is notable for including zirconium (Zr) and niobium (Nb). Zirconium is used to improve ductility and oxidation resistance. Niobium is primarily used to improve yield strength, particularly at elevated temperatures.
| Fe | 79.7 to 83.7 | |
| Cr | 16 to 17.5 | |
| Mn | 0 to 1.0 | |
| Si | 0 to 1.0 | |
| Nb | 0.35 to 0.55 | |
| Zr | 0 to 0.15 | |
| P | 0 to 0.040 | |
| C | 0 to 0.030 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
EN 10088-1: Stainless steels - Part 1: List of stainless steels
Corrosion of Stainless Steels, A. John Sedriks, 1996
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010