EN 1.4446 (GX2CrNiMoN17-13-4) Cast Stainless Steel
EN 1.4446 stainless steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.4446 is the EN numeric designation for this material. GX2CrNiMoN17-13-4 is the EN chemical designation.
It has a moderately high electrical conductivity and a moderately low tensile strength among cast austenitic stainless steels.
The graph bars on the material properties cards below compare EN 1.4446 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
23 %
Fatigue Strength
160 MPa 23 x 103 psi
Impact Strength: V-Notched Charpy
56 J 41 ft-lb
Poisson's Ratio
0.28
Shear Modulus
79 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
490 MPa 71 x 103 psi
Tensile Strength: Yield (Proof)
240 MPa 35 x 103 psi
Thermal Properties
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
410 °C 780 °F
Maximum Temperature: Mechanical
980 °C 1800 °F
Melting Completion (Liquidus)
1460 °C 2650 °F
Melting Onset (Solidus)
1410 °C 2570 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
14 W/m-K 7.8 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
22 % relative
Density
7.9 g/cm3 500 lb/ft3
Embodied Carbon
4.5 kg CO2/kg material
Embodied Energy
60 MJ/kg 26 x 103 BTU/lb
Embodied Water
160 L/kg 19 gal/lb
Common Calculations
PREN (Pitting Resistance)
34
Resilience: Ultimate (Unit Rupture Work)
93 MJ/m3
Resilience: Unit (Modulus of Resilience)
140 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
17 points
Thermal Diffusivity
3.6 mm2/s
Thermal Shock Resistance
11 points
Alloy Composition
Among cast stainless steels, the composition of EN 1.4446 stainless steel is notable for containing comparatively high amounts of molybdenum (Mo) and nickel (Ni). Molybdenum is used to facilitate tempering. In addition, it offers modest bonuses to a wide range of material properties. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.
| Fe | 59.7 to 66.9 | |
| Cr | 16.5 to 18.5 | |
| Ni | 12.5 to 14.5 | |
| Mo | 4.0 to 4.5 | |
| Mn | 0 to 1.5 | |
| Si | 0 to 1.0 | |
| N | 0.12 to 0.22 | |
| P | 0 to 0.040 | |
| C | 0 to 0.030 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10283: Corrosion resistant steel castings
Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016
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