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EN 1.4315 (X5CrNiN19-9) Stainless Steel

EN 1.4315 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed (AT) condition. 1.4315 is the EN numeric designation for this material. X5CrNiN19-9 is the EN chemical designation.

The graph bars on the material properties cards below compare EN 1.4315 stainless steel to: wrought 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

180

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

45 %

Fatigue Strength

290 MPa 41 x 103 psi

Impact Strength: V-Notched Charpy

90 J 67 ft-lb

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Shear Strength

440 MPa 64 x 103 psi

Tensile Strength: Ultimate (UTS)

630 MPa 91 x 103 psi

Tensile Strength: Yield (Proof)

310 MPa 45 x 103 psi

Thermal Properties

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

420 °C 790 °F

Maximum Temperature: Mechanical

960 °C 1760 °F

Melting Completion (Liquidus)

1420 °C 2590 °F

Melting Onset (Solidus)

1380 °C 2510 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

15 W/m-K 8.7 BTU/h-ft-°F

Thermal Expansion

16 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.7 % IACS

Otherwise Unclassified Properties

Base Metal Price

15 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

3.0 kg CO2/kg material

Embodied Energy

43 MJ/kg 19 x 103 BTU/lb

Embodied Water

150 L/kg 17 gal/lb

Common Calculations

PREN (Pitting Resistance)

22

Resilience: Ultimate (Unit Rupture Work)

240 MJ/m3

Resilience: Unit (Modulus of Resilience)

240 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

21 points

Thermal Diffusivity

4.0 mm2/s

Thermal Shock Resistance

14 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4315 stainless steel is notable for containing comparatively high amounts of chromium (Cr) and nickel (Ni). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.

Iron (Fe) 65.7 to 73.9
Chromium (Cr) 18 to 20
Nickel (Ni) 8.0 to 11
Manganese (Mn) 0 to 2.0
Silicon (Si) 0 to 1.0
Nitrogen (N) 0.12 to 0.22
Carbon (C) 0 to 0.060
Phosphorus (P) 0 to 0.045
Sulfur (S) 0 to 0.015

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

Followup Questions

Similar Alloys

Further Reading

EN 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes

EN 10088-3: Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes

EN 10088-1: Stainless steels - Part 1: List of stainless steels

Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring, H. S. Khatak and B. Raj (editors), 2002

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

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015