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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.

Iron (Fe) 58.2 to 65.4
Chromium (Cr) 16 to 18
Nickel (Ni) 8.0 to 9.0
Manganese (Mn) 7.0 to 9.0
Silicon (Si) 3.5 to 4.5
Molybdenum (Mo) 0 to 1.0
Nitrogen (N) 0.080 to 0.18
Carbon (C) 0 to 0.050
Phosphorus (P) 0 to 0.045
Sulfur (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