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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.

Iron (Fe) 33.6 to 40.6
Nickel (Ni) 34 to 36
Chromium (Cr) 24 to 26
Silicon (Si) 1.2 to 2.0
Manganese (Mn) 0 to 2.0
Nitrogen (N) 0.12 to 0.2
Carbon (C) 0.040 to 0.080
Cerium (Ce) 0.030 to 0.080
Phosphorus (P) 0 to 0.040
Sulfur (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