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EN 1.4823 (GX40CrNiSi27-4) Cast Stainless Steel

EN 1.4823 stainless steel is a duplex stainless steel formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 1.4823 is the EN numeric designation for this material. GX40CrNiSi27-4 is the EN chemical designation.

It has a moderately low base cost among cast duplex stainless steels. In addition, it has the lowest ductility and the lowest embodied energy.

The graph bars on the material properties cards below compare EN 1.4823 stainless steel to: cast 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

3.4 %

Fatigue Strength

130 MPa 19 x 103 psi

Poisson's Ratio

0.27

Shear Modulus

79 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

620 MPa 89 x 103 psi

Tensile Strength: Yield (Proof)

290 MPa 41 x 103 psi

Thermal Properties

Latent Heat of Fusion

320 J/g

Maximum Temperature: Corrosion

450 °C 830 °F

Maximum Temperature: Mechanical

1100 °C 2010 °F

Melting Completion (Liquidus)

1400 °C 2550 °F

Melting Onset (Solidus)

1360 °C 2470 °F

Specific Heat Capacity

490 J/kg-K 0.12 BTU/lb-°F

Thermal Conductivity

17 W/m-K 9.7 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.4 % IACS

Otherwise Unclassified Properties

Base Metal Price

16 % relative

Density

7.6 g/cm3 470 lb/ft3

Embodied Carbon

3.0 kg CO2/kg material

Embodied Energy

43 MJ/kg 19 x 103 BTU/lb

Embodied Water

170 L/kg 20 gal/lb

Common Calculations

PREN (Pitting Resistance)

27

Resilience: Ultimate (Unit Rupture Work)

17 MJ/m3

Resilience: Unit (Modulus of Resilience)

200 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

26 points

Strength to Weight: Axial

23 points

Strength to Weight: Bending

21 points

Thermal Diffusivity

4.5 mm2/s

Thermal Shock Resistance

17 points

Alloy Composition

Among cast stainless steels, the composition of EN 1.4823 stainless steel is notable for containing comparatively high amounts of chromium (Cr) and silicon (Si). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion 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) 60.9 to 70.7
Chromium (Cr) 25 to 28
Nickel (Ni) 3.0 to 6.0
Silicon (Si) 1.0 to 2.5
Manganese (Mn) 0 to 1.5
Carbon (C) 0.3 to 0.5
Molybdenum (Mo) 0 to 0.5
Phosphorus (P) 0 to 0.040
Sulfur (S) 0 to 0.030

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

EN 10295: Heat Resistant Steel Castings

Duplex Stainless Steels, Iris Alvarez-Armas and Suzanne Degallaix-Moreuil (editors), 2009

Duplex Stainless Steels: Microstructure, Properties and Applications, Robert N. Gunn (editor), 1997

Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016

Corrosion of Stainless Steels, A. John Sedriks, 1996

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010