EN 1.4527 (GX4NiCrCuMo30-20-4) Cast Stainless Steel
EN 1.4527 stainless steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.4527 is the EN numeric designation for this material. GX4NiCrCuMo30-20-4 is the EN chemical designation.
It has a fairly low tensile strength among cast austenitic stainless steels. In addition, it has a moderately high ductility and a moderately high base cost.
The graph bars on the material properties cards below compare EN 1.4527 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
40 %
Fatigue Strength
170 MPa 24 x 103 psi
Impact Strength: V-Notched Charpy
67 J 50 ft-lb
Poisson's Ratio
0.28
Shear Modulus
77 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
480 MPa 70 x 103 psi
Tensile Strength: Yield (Proof)
190 MPa 28 x 103 psi
Thermal Properties
Latent Heat of Fusion
310 J/g
Maximum Temperature: Corrosion
430 °C 800 °F
Maximum Temperature: Mechanical
1100 °C 2010 °F
Melting Completion (Liquidus)
1410 °C 2570 °F
Melting Onset (Solidus)
1360 °C 2480 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
15 W/m-K 8.7 BTU/h-ft-°F
Thermal Expansion
15 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
32 % relative
Density
8.1 g/cm3 500 lb/ft3
Embodied Carbon
5.6 kg CO2/kg material
Embodied Energy
78 MJ/kg 34 x 103 BTU/lb
Embodied Water
210 L/kg 25 gal/lb
Common Calculations
PREN (Pitting Resistance)
29
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m3
Resilience: Unit (Modulus of Resilience)
95 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
17 points
Thermal Diffusivity
4.0 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
Among cast stainless steels, the composition of EN 1.4527 stainless steel is notable for containing a comparatively high amount of nickel (Ni) and including copper (Cu). Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion. Copper is primarily used to improve resistance to acids.
| Fe | 37.4 to 48.5 | |
| Ni | 27.5 to 30.5 | |
| Cr | 19 to 22 | |
| Cu | 3.0 to 4.0 | |
| Mo | 2.0 to 3.0 | |
| Mn | 0 to 1.5 | |
| Si | 0 to 1.5 | |
| C | 0 to 0.060 | |
| P | 0 to 0.040 | |
| 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