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EN 1.4710 (GX30CrSi7) Cast Stainless Steel

EN 1.4710 stainless steel is a ferritic stainless steel formulated for casting. Cited properties are appropriate for the annealed condition. 1.4710 is the EN numeric designation for this material. GX30CrSi7 is the EN chemical designation.

It has the lowest base cost among cast ferritic stainless steels. In addition, it has the highest electrical conductivity and the lowest embodied energy.

The graph bars on the material properties cards below compare EN 1.4710 stainless steel to: cast ferritic 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

260

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

20 %

Poisson's Ratio

0.29

Shear Modulus

74 GPa 11 x 106 psi

Thermal Properties

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

360 °C 680 °F

Maximum Temperature: Mechanical

750 °C 1380 °F

Melting Completion (Liquidus)

1430 °C 2610 °F

Melting Onset (Solidus)

1390 °C 2530 °F

Specific Heat Capacity

480 J/kg-K 0.12 BTU/lb-°F

Thermal Conductivity

24 W/m-K 14 BTU/h-ft-°F

Thermal Expansion

9.9 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

6.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

7.5 % IACS

Otherwise Unclassified Properties

Base Metal Price

5.0 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

1.8 kg CO2/kg material

Embodied Energy

24 MJ/kg 10 x 103 BTU/lb

Embodied Water

76 L/kg 9.1 gal/lb

Common Calculations

PREN (Pitting Resistance)

7.2

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Thermal Diffusivity

6.5 mm2/s

Alloy Composition

Among cast stainless steels, the composition of EN 1.4710 stainless steel is notable for containing a comparatively high amount of silicon (Si). Silicon content is typically governed by metallurgical processing concerns, but it can also be added for the purpose of improving oxidation resistance.

Iron (Fe) 87.4 to 92.3
Chromium (Cr) 6.0 to 8.0
Silicon (Si) 1.0 to 2.5
Manganese (Mn) 0.5 to 1.0
Carbon (C) 0.2 to 0.35
Nickel (Ni) 0 to 0.5
Molybdenum (Mo) 0 to 0.15
Phosphorus (P) 0 to 0.035
Sulfur (S) 0 to 0.030

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

EN 10295: Heat Resistant Steel Castings

Creep-Resistant Steels, Fujio Abe et al. (editors), 2008

Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012

Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993

Corrosion of Stainless Steels, A. John Sedriks, 1996

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010