EN 1.4409 (GX2CrNiMo19-11-2) Cast Stainless Steel
EN 1.4409 stainless steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.4409 is the EN numeric designation for this material. GX2CrNiMo19-11-2 is the EN chemical designation.
It has a moderately low tensile strength and a moderately low embodied energy among cast austenitic stainless steels.
The graph bars on the material properties cards below compare EN 1.4409 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
140
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
34 %
Fatigue Strength
180 MPa 26 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)
490 MPa 71 x 103 psi
Tensile Strength: Yield (Proof)
220 MPa 32 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
420 °C 790 °F
Maximum Temperature: Mechanical
990 °C 1810 °F
Melting Completion (Liquidus)
1440 °C 2620 °F
Melting Onset (Solidus)
1390 °C 2540 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
15 W/m-K 8.8 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.1 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
19 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
3.7 kg CO2/kg material
Embodied Energy
52 MJ/kg 22 x 103 BTU/lb
Embodied Water
160 L/kg 18 gal/lb
Common Calculations
PREN (Pitting Resistance)
28
Resilience: Ultimate (Unit Rupture Work)
140 MJ/m3
Resilience: Unit (Modulus of Resilience)
120 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
18 points
Thermal Diffusivity
4.1 mm2/s
Thermal Shock Resistance
11 points
Alloy Composition
Among cast stainless steels, the composition of EN 1.4409 stainless steel is notable for including nitrogen (N) and containing a comparatively high amount of molybdenum (Mo). Nitrogen has a substantial strengthening effect, but has a complex (frequently negative) relationship with corrosion resistance. Molybdenum is used to facilitate tempering. In addition, it offers modest bonuses to a wide range of material properties.
| Fe | 61.7 to 71 | |
| Cr | 18 to 20 | |
| Ni | 9.0 to 12 | |
| Mo | 2.0 to 2.5 | |
| Mn | 0 to 2.0 | |
| Si | 0 to 1.5 | |
| N | 0 to 0.2 | |
| P | 0 to 0.035 | |
| C | 0 to 0.030 | |
| S | 0 to 0.025 |
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
EN 10283: Corrosion resistant steel castings
Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984
Corrosion of Stainless Steels, A. John Sedriks, 1996
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