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EN 1.4571 (X6CrNiMoTi17-12-2) Stainless Steel

EN 1.4571 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. 1.4571 is the EN numeric designation for this material. X6CrNiMoTi17-12-2 is the EN chemical designation.

The properties of EN 1.4571 stainless steel include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4571 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

190 to 270

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

14 to 40 %

Fatigue Strength

200 to 330 MPa 29 to 47 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

78 GPa 11 x 106 psi

Shear Strength

410 to 550 MPa 60 to 79 x 103 psi

Tensile Strength: Ultimate (UTS)

600 to 900 MPa 87 to 130 x 103 psi

Tensile Strength: Yield (Proof)

230 to 570 MPa 34 to 83 x 103 psi

Thermal Properties

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

480 °C 890 °F

Maximum Temperature: Mechanical

950 °C 1750 °F

Melting Completion (Liquidus)

1440 °C 2630 °F

Melting Onset (Solidus)

1400 °C 2550 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

15 W/m-K 8.7 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.3 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.6 % IACS

Otherwise Unclassified Properties

Base Metal Price

19 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

3.9 kg CO2/kg material

Embodied Energy

54 MJ/kg 23 x 103 BTU/lb

Embodied Water

150 L/kg 18 gal/lb

Common Calculations

PREN (Pitting Resistance)

25

Resilience: Ultimate (Unit Rupture Work)

110 to 190 MJ/m3

Resilience: Unit (Modulus of Resilience)

130 to 820 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

21 to 32 points

Strength to Weight: Bending

20 to 26 points

Thermal Diffusivity

4.0 mm2/s

Thermal Shock Resistance

13 to 20 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4571 stainless steel is notable for including titanium (Ti). Titanium is used to broadly improve mechanical properties.

Iron (Fe)Fe 61.7 to 71
Chromium (Cr)Cr 16.5 to 18.5
Nickel (Ni)Ni 10.5 to 13.5
Molybdenum (Mo)Mo 2.0 to 2.5
Manganese (Mn)Mn 0 to 2.0
Silicon (Si)Si 0 to 1.0
Titanium (Ti)Ti 0 to 0.7
Carbon (C)C 0 to 0.080
Phosphorus (P)P 0 to 0.045
Sulfur (S)S 0 to 0.015

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

Followup Questions

Similar Alloys

Further Reading

EN 10222-5: Steel forgings for pressure purposes - Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels

EN 10272: Stainless steel bars for pressure purposes

EN 10250-4: Open die steel forgings for general engineering purposes - Part 4: Stainless steels

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