EN 1.4655 (X2CrNiCuN23-4) Stainless Steel
EN 1.4655 stainless steel is a duplex stainless steel formulated for primary forming into wrought products. 1.4655 is the EN numeric designation for this material. X2CrNiCuN23-4 is the EN chemical designation.
The properties of EN 1.4655 stainless steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4655 stainless steel to: wrought duplex 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 29 x 106 psi
Elongation at Break
23 to 25 %
Fatigue Strength
320 MPa 46 to 47 x 103 psi
Poisson's Ratio
0.27
Shear Modulus
78 GPa 11 x 106 psi
Shear Strength
460 MPa 67 x 103 psi
Tensile Strength: Ultimate (UTS)
720 to 730 MPa 100 to 110 x 103 psi
Tensile Strength: Yield (Proof)
450 to 480 MPa 66 to 69 x 103 psi
Thermal Properties
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
440 °C 820 °F
Maximum Temperature: Mechanical
1050 °C 1930 °F
Melting Completion (Liquidus)
1420 °C 2590 °F
Melting Onset (Solidus)
1370 °C 2510 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
15 W/m-K 8.7 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
15 % relative
Density
7.7 g/cm3 480 lb/ft3
Embodied Carbon
2.9 kg CO2/kg material
Embodied Energy
41 MJ/kg 18 x 103 BTU/lb
Embodied Water
160 L/kg 19 gal/lb
Common Calculations
PREN (Pitting Resistance)
26
Resilience: Ultimate (Unit Rupture Work)
150 to 160 MJ/m3
Resilience: Unit (Modulus of Resilience)
510 to 580 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
23 points
Thermal Diffusivity
4.0 mm2/s
Thermal Shock Resistance
20 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4655 stainless steel is notable for containing a comparatively high amount of chromium (Cr) and including copper (Cu). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance. Copper is used to improve resistance to acids, and to improve formability.
| Fe | 63.6 to 73.4 | |
| Cr | 22 to 24 | |
| Ni | 3.5 to 5.5 | |
| Cu | 1.0 to 3.0 | |
| Mn | 0 to 2.0 | |
| Si | 0 to 1.0 | |
| Mo | 0.1 to 0.6 | |
| N | 0.050 to 0.2 | |
| P | 0 to 0.035 | |
| 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
Duplex Stainless Steels, Iris Alvarez-Armas and Suzanne Degallaix-Moreuil (editors), 2009
Duplex Stainless Steels: Microstructure, Properties and Applications, Robert N. Gunn (editor), 1997
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