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EN 1.3960 (Gx2CrNiMoN18-140) Cast Stainless Steel

EN 1.3960 stainless steel is a duplex stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.3960 is the EN numeric designation for this material. Gx2CrNiMoN18-140 is the EN chemical designation.

It has a moderately high ductility among the cast duplex stainless steels in the database.

The graph bars on the material properties cards below compare EN 1.3960 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

220 MPa 32 x 103 psi

Impact Strength: V-Notched Charpy

90 J 66 ft-lb

Poisson's Ratio

0.28

Shear Modulus

78 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

590 MPa 86 x 103 psi

Tensile Strength: Yield (Proof)

270 MPa 40 x 103 psi

Thermal Properties

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

410 °C 780 °F

Maximum Temperature: Mechanical

970 °C 1770 °F

Melting Completion (Liquidus)

1440 °C 2630 °F

Melting Onset (Solidus)

1400 °C 2550 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

15 W/m-K 8.4 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

21 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

4.1 kg CO2/kg material

Embodied Energy

57 MJ/kg 24 x 103 BTU/lb

Embodied Water

160 L/kg 19 gal/lb

Common Calculations

PREN (Pitting Resistance)

30

Resilience: Ultimate (Unit Rupture Work)

170 MJ/m3

Resilience: Unit (Modulus of Resilience)

190 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

21 points

Strength to Weight: Bending

20 points

Thermal Diffusivity

3.9 mm2/s

Thermal Shock Resistance

17 points

Alloy Composition

Among cast stainless steels, the composition of EN 1.3960 stainless steel is notable for containing a comparatively high amount of nickel (Ni) and including nitrogen (N). Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion. Nitrogen has a substantial strengthening effect, but has a complex (frequently negative) relationship with corrosion resistance.

Iron (Fe) 60.2 to 67.9
Chromium (Cr) 16.5 to 18.5
Nickel (Ni) 13 to 15
Molybdenum (Mo) 2.5 to 3.0
Manganese (Mn) 0 to 2.0
Silicon (Si) 0 to 1.0
Nitrogen (N) 0.15 to 0.25
Phosphorus (P) 0 to 0.035
Carbon (C) 0 to 0.030
Sulfur (S) 0 to 0.020

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

Followup Questions

Similar Alloys

Further Reading

ISO 19960: Cast steels and alloys with special physical properties

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

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

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