EN 1.4872 (X25CrMnNiN25-9-7) Stainless Steel
EN 1.4872 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed (AT) condition. 1.4872 is the EN numeric designation for this material. X25CrMnNiN25-9-7 is the EN chemical designation.
It has a fairly high tensile strength and a fairly low ductility among wrought austenitic stainless steels.
The graph bars on the material properties cards below compare EN 1.4872 stainless steel to: wrought austenitic 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
270
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
28 %
Fatigue Strength
410 MPa 59 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
79 GPa 11 x 106 psi
Shear Strength
620 MPa 89 x 103 psi
Tensile Strength: Ultimate (UTS)
950 MPa 140 x 103 psi
Tensile Strength: Yield (Proof)
560 MPa 81 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
440 °C 830 °F
Maximum Temperature: Mechanical
1150 °C 2100 °F
Melting Completion (Liquidus)
1390 °C 2530 °F
Melting Onset (Solidus)
1340 °C 2450 °F
Specific Heat Capacity
490 J/kg-K 0.12 BTU/lb-°F
Thermal Conductivity
15 W/m-K 8.4 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.7 % IACS
Otherwise Unclassified Properties
Base Metal Price
17 % relative
Density
7.6 g/cm3 480 lb/ft3
Embodied Carbon
3.3 kg CO2/kg material
Embodied Energy
47 MJ/kg 20 x 103 BTU/lb
Embodied Water
180 L/kg 22 gal/lb
Common Calculations
PREN (Pitting Resistance)
30
Resilience: Ultimate (Unit Rupture Work)
230 MJ/m3
Resilience: Unit (Modulus of Resilience)
780 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
26 points
Strength to Weight: Axial
35 points
Strength to Weight: Bending
28 points
Thermal Diffusivity
3.9 mm2/s
Thermal Shock Resistance
21 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4872 stainless steel is notable for containing comparatively high amounts of manganese (Mn) and chromium (Cr). Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible. Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance.
| Fe | 54.2 to 61.6 | |
| Cr | 24 to 26 | |
| Mn | 8.0 to 10 | |
| Ni | 6.0 to 8.0 | |
| Si | 0 to 1.0 | |
| N | 0.2 to 0.4 | |
| C | 0.2 to 0.3 | |
| P | 0 to 0.045 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10095: Heat resisting steels and nickel alloys
Metallic Materials: Physical, Mechanical, and Corrosion Properties, Philip A. Schweitzer, 2003
EN 10088-1: Stainless steels - Part 1: List of stainless steels
Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012
Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring, H. S. Khatak and B. Raj (editors), 2002
Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010