MakeItFrom.com
Menu (ESC)

EN 1.4451 (GX2CrNiMoCuN26-5-3-3) Cast Stainless Steel

EN 1.4451 stainless steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the solution annealed (AT) condition. 1.4451 is the EN numeric designation for this material. GX2CrNiMoCuN26-5-3-3 is the EN chemical designation.

It has the highest tensile strength among cast austenitic stainless steels. In addition, it has a fairly high thermal conductivity and a moderately high electrical conductivity.

The graph bars on the material properties cards below compare EN 1.4451 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

220

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

25 %

Fatigue Strength

370 MPa 54 x 103 psi

Poisson's Ratio

0.27

Shear Modulus

80 GPa 12 x 106 psi

Tensile Strength: Ultimate (UTS)

750 MPa 110 x 103 psi

Tensile Strength: Yield (Proof)

540 MPa 78 x 103 psi

Thermal Properties

Latent Heat of Fusion

300 J/g

Maximum Temperature: Corrosion

450 °C 840 °F

Maximum Temperature: Mechanical

1100 °C 2010 °F

Melting Completion (Liquidus)

1430 °C 2610 °F

Melting Onset (Solidus)

1380 °C 2520 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

17 W/m-K 9.6 BTU/h-ft-°F

Thermal Expansion

17 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

20 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

3.8 kg CO2/kg material

Embodied Energy

53 MJ/kg 23 x 103 BTU/lb

Embodied Water

190 L/kg 22 gal/lb

Common Calculations

PREN (Pitting Resistance)

39

Resilience: Ultimate (Unit Rupture Work)

170 MJ/m3

Resilience: Unit (Modulus of Resilience)

710 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

27 points

Strength to Weight: Bending

23 points

Thermal Diffusivity

4.5 mm2/s

Thermal Shock Resistance

16 points

Alloy Composition

Among cast stainless steels, the composition of EN 1.4451 stainless steel is notable for containing a comparatively high amount of chromium (Cr) and including copper (Cu). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance. Copper is primarily used to improve resistance to acids.

Iron (Fe) 56.2 to 64.6
Chromium (Cr) 25 to 27
Nickel (Ni) 5.0 to 7.0
Copper (Cu) 2.8 to 3.5
Molybdenum (Mo) 2.5 to 3.5
Manganese (Mn) 0 to 1.5
Silicon (Si) 0 to 1.0
Nitrogen (N) 0.12 to 0.22
Phosphorus (P) 0 to 0.035
Carbon (C) 0 to 0.030
Sulfur (S) 0 to 0.025

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

Followup Questions

Similar Alloys

Further Reading

ISO 4991: Steel castings for pressure purposes

Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984

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