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EN 1.4487 (GX2CrNiN19-11) Cast Stainless Steel

EN 1.4487 stainless steel is a duplex stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.4487 is the EN numeric designation for this material. GX2CrNiN19-11 is the EN chemical designation.

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

The graph bars on the material properties cards below compare EN 1.4487 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

34 %

Fatigue Strength

210 MPa 30 x 103 psi

Impact Strength: V-Notched Charpy

90 J 66 ft-lb

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

560 MPa 81 x 103 psi

Tensile Strength: Yield (Proof)

260 MPa 38 x 103 psi

Thermal Properties

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

420 °C 790 °F

Maximum Temperature: Mechanical

960 °C 1760 °F

Melting Completion (Liquidus)

1420 °C 2590 °F

Melting Onset (Solidus)

1380 °C 2510 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

16 W/m-K 9.0 BTU/h-ft-°F

Thermal Expansion

12 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.2 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.6 % IACS

Otherwise Unclassified Properties

Base Metal Price

16 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

3.1 kg CO2/kg material

Embodied Energy

44 MJ/kg 19 x 103 BTU/lb

Embodied Water

150 L/kg 18 gal/lb

Common Calculations

PREN (Pitting Resistance)

22

Resilience: Ultimate (Unit Rupture Work)

160 MJ/m3

Resilience: Unit (Modulus of Resilience)

170 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

20 points

Strength to Weight: Bending

19 points

Thermal Diffusivity

4.2 mm2/s

Thermal Shock Resistance

16 points

Alloy Composition

Among cast stainless steels, the composition of EN 1.4487 stainless steel is notable for including nitrogen (N) and containing a comparatively high amount of nickel (Ni). Nitrogen has a substantial strengthening effect, but has a complex (frequently negative) relationship with corrosion resistance. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.

Iron (Fe) 64.7 to 72.9
Chromium (Cr) 18 to 20
Nickel (Ni) 9.0 to 12
Manganese (Mn) 0 to 1.5
Silicon (Si) 0 to 1.5
Nitrogen (N) 0.12 to 0.2
Phosphorus (P) 0 to 0.040
Carbon (C) 0 to 0.030
Sulfur (S) 0 to 0.030

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

Followup Questions

Similar Alloys

Further Reading

ISO 11972: Corrosion-resistant cast steels for general applications

ISO 4991: Steel castings for pressure purposes

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

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

Corrosion of Stainless Steels, A. John Sedriks, 1996

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