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EN 1.4335 (X1CrNi25-21) Stainless Steel

EN 1.4335 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed (AT) condition. 1.4335 is the EN numeric designation for this material. X1CrNi25-21 is the EN chemical designation.

It has a moderately low electrical conductivity among wrought austenitic stainless steels. In addition, it has a moderately high base cost and a fairly low tensile strength.

The graph bars on the material properties cards below compare EN 1.4335 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

170

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

45 %

Fatigue Strength

210 MPa 30 x 103 psi

Impact Strength: V-Notched Charpy

90 J 67 ft-lb

Poisson's Ratio

0.27

Shear Modulus

79 GPa 11 x 106 psi

Shear Strength

400 MPa 58 x 103 psi

Tensile Strength: Ultimate (UTS)

570 MPa 83 x 103 psi

Tensile Strength: Yield (Proof)

230 MPa 33 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)

1410 °C 2570 °F

Melting Onset (Solidus)

1370 °C 2490 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

14 W/m-K 8.1 BTU/h-ft-°F

Thermal Expansion

16 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

25 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

4.4 kg CO2/kg material

Embodied Energy

62 MJ/kg 27 x 103 BTU/lb

Embodied Water

190 L/kg 23 gal/lb

Common Calculations

PREN (Pitting Resistance)

26

Resilience: Ultimate (Unit Rupture Work)

210 MJ/m3

Resilience: Unit (Modulus of Resilience)

130 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

20 points

Strength to Weight: Bending

19 points

Thermal Diffusivity

3.7 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4335 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) 49.4 to 56
Chromium (Cr) 24 to 26
Nickel (Ni) 20 to 22
Manganese (Mn) 0 to 2.0
Silicon (Si) 0 to 0.25
Molybdenum (Mo) 0 to 0.2
Nitrogen (N) 0 to 0.1
Phosphorus (P) 0 to 0.025
Carbon (C) 0 to 0.020
Sulfur (S) 0 to 0.010

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

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

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