EN 1.3975 (GX3CrNiMnSi17-9-8) Cast Stainless Steel
EN 1.3975 stainless steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.3975 is the EN numeric designation for this material. GX3CrNiMnSi17-9-8 is the EN chemical designation.
It has a very low base cost among cast austenitic stainless steels. In addition, it has a fairly high tensile strength and a moderately low embodied energy.
The graph bars on the material properties cards below compare EN 1.3975 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
190
Elastic (Young's, Tensile) Modulus
190 GPa 28 x 106 psi
Elongation at Break
27 %
Fatigue Strength
230 MPa 34 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
76 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
660 MPa 96 x 103 psi
Tensile Strength: Yield (Proof)
320 MPa 47 x 103 psi
Thermal Properties
Latent Heat of Fusion
340 J/g
Maximum Temperature: Corrosion
410 °C 770 °F
Maximum Temperature: Mechanical
910 °C 1660 °F
Melting Completion (Liquidus)
1360 °C 2480 °F
Melting Onset (Solidus)
1320 °C 2410 °F
Specific Heat Capacity
500 J/kg-K 0.12 BTU/lb-°F
Thermal Expansion
16 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
15 % relative
Density
7.5 g/cm3 470 lb/ft3
Embodied Carbon
3.3 kg CO2/kg material
Embodied Energy
47 MJ/kg 20 x 103 BTU/lb
Embodied Water
150 L/kg 18 gal/lb
Common Calculations
PREN (Pitting Resistance)
21
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m3
Resilience: Unit (Modulus of Resilience)
270 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
26 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 1.3975 stainless steel is notable for containing comparatively high amounts of manganese (Mn) and silicon (Si). Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible. Silicon content is typically governed by metallurgical processing concerns, but it can also be added for the purpose of improving oxidation resistance.
| Fe | 58.2 to 65.4 | |
| Cr | 16 to 18 | |
| Ni | 8.0 to 9.0 | |
| Mn | 7.0 to 9.0 | |
| Si | 3.5 to 4.5 | |
| Mo | 0 to 1.0 | |
| N | 0.080 to 0.18 | |
| C | 0 to 0.050 | |
| P | 0 to 0.045 | |
| S | 0 to 0.030 |
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