EN 1.4507 (X2CrNiMoCuN25-6-3) Stainless Steel
EN 1.4507 stainless steel is a duplex stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed (AT) condition. 1.4507 is the EN numeric designation for this material. X2CrNiMoCuN25-6-3 is the EN chemical designation.
It has a moderately high base cost among wrought duplex stainless steels. In addition, it has a moderately high embodied energy and a moderately high tensile strength.
The graph bars on the material properties cards below compare EN 1.4507 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
Brinell Hardness
230
Elastic (Young's, Tensile) Modulus
200 GPa 30 x 106 psi
Elongation at Break
25 %
Fatigue Strength
410 MPa 60 x 103 psi
Impact Strength: V-Notched Charpy
90 J 67 ft-lb
Poisson's Ratio
0.27
Shear Modulus
80 GPa 12 x 106 psi
Shear Strength
530 MPa 78 x 103 psi
Tensile Strength: Ultimate (UTS)
840 MPa 120 x 103 psi
Tensile Strength: Yield (Proof)
590 MPa 85 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
450 °C 840 °F
Maximum Temperature: Mechanical
1100 °C 2010 °F
Melting Completion (Liquidus)
1440 °C 2620 °F
Melting Onset (Solidus)
1390 °C 2540 °F
Specific Heat Capacity
470 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
21 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
4.0 kg CO2/kg material
Embodied Energy
55 MJ/kg 24 x 103 BTU/lb
Embodied Water
180 L/kg 22 gal/lb
Common Calculations
PREN (Pitting Resistance)
41
Resilience: Ultimate (Unit Rupture Work)
190 MJ/m3
Resilience: Unit (Modulus of Resilience)
850 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
30 points
Strength to Weight: Bending
25 points
Thermal Diffusivity
4.0 mm2/s
Thermal Shock Resistance
23 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4507 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 | 56.4 to 65.8 | |
| Cr | 24 to 26 | |
| Ni | 6.0 to 8.0 | |
| Mo | 3.0 to 4.0 | |
| Cu | 1.0 to 2.5 | |
| Mn | 0 to 2.0 | |
| Si | 0 to 0.7 | |
| N | 0.2 to 0.3 | |
| 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
EN 10272: Stainless steel bars for pressure purposes
EN 10250-4: Open die steel forgings for general engineering purposes - Part 4: Stainless steels
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 10088-3: Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products 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