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EN 1.3967 (GX2CrNiMnMoNNb21-16-5-3) Cast Stainless Steel

EN 1.3967 stainless steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.3967 is the EN numeric designation for this material. GX2CrNiMnMoNNb21-16-5-3 is the EN chemical designation.

It has a very high tensile strength among the cast austenitic stainless steels in the database.

The graph bars on the material properties cards below compare EN 1.3967 stainless steel to: cast austenitic 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

200

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

22 %

Fatigue Strength

240 MPa 34 x 103 psi

Impact Strength: V-Notched Charpy

74 J 55 ft-lb

Poisson's Ratio

0.28

Shear Modulus

79 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

690 MPa 99 x 103 psi

Tensile Strength: Yield (Proof)

350 MPa 51 x 103 psi

Thermal Properties

Latent Heat of Fusion

300 J/g

Maximum Temperature: Corrosion

440 °C 830 °F

Maximum Temperature: Mechanical

1070 °C 1950 °F

Melting Completion (Liquidus)

1430 °C 2600 °F

Melting Onset (Solidus)

1380 °C 2520 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Expansion

16 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

25 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

4.8 kg CO2/kg material

Embodied Energy

66 MJ/kg 28 x 103 BTU/lb

Embodied Water

180 L/kg 22 gal/lb

Common Calculations

PREN (Pitting Resistance)

36

Resilience: Ultimate (Unit Rupture Work)

130 MJ/m3

Resilience: Unit (Modulus of Resilience)

310 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

22 points

Thermal Shock Resistance

15 points

Alloy Composition

Among cast stainless steels, the composition of EN 1.3967 stainless steel is notable for containing a comparatively high amount of manganese (Mn) and including niobium (Nb). Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible. Niobium is primarily used to improve yield strength, particularly at elevated temperatures.

Iron (Fe) 50.3 to 57.8
Chromium (Cr) 20 to 21.5
Nickel (Ni) 15 to 17
Manganese (Mn) 4.0 to 6.0
Molybdenum (Mo) 3.0 to 3.5
Silicon (Si) 0 to 1.0
Nitrogen (N) 0.2 to 0.35
Niobium (Nb) 0 to 0.25
Carbon (C) 0 to 0.030
Phosphorus (P) 0 to 0.025
Sulfur (S) 0 to 0.010

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

Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984

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