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EN 1.4941 (X6CrNiTiB18-10) Stainless Steel

EN 1.4941 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed (AT) condition. 1.4941 is the EN numeric designation for this material. X6CrNiTiB18-10 is the EN chemical designation.

It has a moderately low ductility among the wrought austenitic stainless steels in the database.

The graph bars on the material properties cards below compare EN 1.4941 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 28 x 106 psi

Elongation at Break

39 %

Fatigue Strength

180 MPa 26 x 103 psi

Impact Strength: V-Notched Charpy

98 J 72 ft-lb

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Shear Strength

400 MPa 58 x 103 psi

Tensile Strength: Ultimate (UTS)

590 MPa 85 x 103 psi

Tensile Strength: Yield (Proof)

210 MPa 31 x 103 psi

Thermal Properties

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

520 °C 970 °F

Maximum Temperature: Mechanical

940 °C 1720 °F

Melting Completion (Liquidus)

1430 °C 2600 °F

Melting Onset (Solidus)

1380 °C 2520 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

16 W/m-K 9.3 BTU/h-ft-°F

Thermal Expansion

16 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.8 % IACS

Otherwise Unclassified Properties

Base Metal Price

16 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

3.3 kg CO2/kg material

Embodied Energy

47 MJ/kg 20 x 103 BTU/lb

Embodied Water

140 L/kg 17 gal/lb

Common Calculations

PREN (Pitting Resistance)

18

Resilience: Ultimate (Unit Rupture Work)

180 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

21 points

Strength to Weight: Bending

20 points

Thermal Diffusivity

4.3 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4941 stainless steel is notable for including boron (B) and titanium (Ti). Boron is used to improve hardenability. It has a substantial effect when added in even tiny amounts. It can also facilitate sintering. Titanium is used to broadly improve mechanical properties.

Iron (Fe)Fe 65.1 to 73.6
Chromium (Cr)Cr 17 to 19
Nickel (Ni)Ni 9.0 to 12
Manganese (Mn)Mn 0 to 2.0
Titanium (Ti)Ti 0.4 to 0.8
Silicon (Si)Si 0 to 1.0
Carbon (C)C 0.040 to 0.080
Phosphorus (P)P 0 to 0.035
Sulfur (S)S 0 to 0.015
Boron (B)B 0.0015 to 0.0050

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 10302: Creep resisting steels, nickel and cobalt alloys

EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

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