EN 1.4854 (X6NiCrSiNCe35-25) Stainless Steel
EN 1.4854 stainless steel is a superaustenitic (highly alloyed) stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed (AT) condition. 1.4854 is the EN numeric designation for this material. X6NiCrSiNCe35-25 is the EN chemical designation.
It has a fairly low thermal conductivity among wrought superaustenitic stainless steels. In addition, it has a moderately high ductility and a moderately high tensile strength.
The graph bars on the material properties cards below compare EN 1.4854 stainless steel to: wrought superaustenitic 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
180
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
45 %
Fatigue Strength
310 MPa 45 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
78 GPa 11 x 106 psi
Shear Strength
520 MPa 76 x 103 psi
Tensile Strength: Ultimate (UTS)
750 MPa 110 x 103 psi
Tensile Strength: Yield (Proof)
340 MPa 49 x 103 psi
Thermal Properties
Latent Heat of Fusion
330 J/g
Maximum Temperature: Corrosion
450 °C 830 °F
Maximum Temperature: Mechanical
1170 °C 2140 °F
Melting Completion (Liquidus)
1370 °C 2510 °F
Melting Onset (Solidus)
1330 °C 2420 °F
Specific Heat Capacity
480 J/kg-K 0.12 BTU/lb-°F
Thermal Conductivity
11 W/m-K 6.4 BTU/h-ft-°F
Thermal Expansion
15 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.0 % IACS
Otherwise Unclassified Properties
Base Metal Price
34 % relative
Density
7.9 g/cm3 500 lb/ft3
Embodied Carbon
5.7 kg CO2/kg material
Embodied Energy
81 MJ/kg 35 x 103 BTU/lb
Embodied Water
220 L/kg 26 gal/lb
Common Calculations
PREN (Pitting Resistance)
28
Resilience: Ultimate (Unit Rupture Work)
270 MJ/m3
Resilience: Unit (Modulus of Resilience)
280 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
2.9 mm2/s
Thermal Shock Resistance
18 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4854 stainless steel is notable for including cerium (Ce) and containing a comparatively high amount of silicon (Si). Cerium is used to improve high temperature oxidation resistance. Silicon content is typically governed by metallurgical processing concerns, but it can also be added for the purpose of improving oxidation resistance.
| Fe | 33.6 to 40.6 | |
| Ni | 34 to 36 | |
| Cr | 24 to 26 | |
| Si | 1.2 to 2.0 | |
| Mn | 0 to 2.0 | |
| N | 0.12 to 0.2 | |
| C | 0.040 to 0.080 | |
| Ce | 0.030 to 0.080 | |
| P | 0 to 0.040 | |
| 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
EN 10088-1: Stainless steels - Part 1: List of stainless steels
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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015