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EN 1.4762 (X10CrAlSi25) Stainless Steel

EN 1.4762 stainless steel is a ferritic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 1.4762 is the EN numeric designation for this material. X10CrAlSi25 is the EN chemical designation.

It has the lowest electrical conductivity among wrought ferritic stainless steels. In addition, it has the lowest ductility and a moderately low thermal conductivity.

The graph bars on the material properties cards below compare EN 1.4762 stainless steel to: wrought ferritic 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

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

13 %

Fatigue Strength

180 MPa 26 x 103 psi

Poisson's Ratio

0.27

Shear Modulus

78 GPa 11 x 106 psi

Shear Strength

370 MPa 54 x 103 psi

Tensile Strength: Ultimate (UTS)

620 MPa 90 x 103 psi

Tensile Strength: Yield (Proof)

310 MPa 45 x 103 psi

Thermal Properties

Latent Heat of Fusion

300 J/g

Maximum Temperature: Corrosion

440 °C 830 °F

Maximum Temperature: Mechanical

1150 °C 2100 °F

Melting Completion (Liquidus)

1410 °C 2570 °F

Melting Onset (Solidus)

1370 °C 2490 °F

Specific Heat Capacity

490 J/kg-K 0.12 BTU/lb-°F

Thermal Conductivity

17 W/m-K 9.8 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

1.6 % IACS

Electrical Conductivity: Equal Weight (Specific)

1.9 % IACS

Otherwise Unclassified Properties

Base Metal Price

12 % relative

Density

7.6 g/cm3 470 lb/ft3

Embodied Carbon

2.5 kg CO2/kg material

Embodied Energy

37 MJ/kg 16 x 103 BTU/lb

Embodied Water

170 L/kg 20 gal/lb

Common Calculations

PREN (Pitting Resistance)

25

Resilience: Ultimate (Unit Rupture Work)

67 MJ/m3

Resilience: Unit (Modulus of Resilience)

250 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

26 points

Strength to Weight: Axial

23 points

Strength to Weight: Bending

21 points

Thermal Diffusivity

4.6 mm2/s

Thermal Shock Resistance

22 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4762 stainless steel is notable for containing a comparatively high amount of silicon (Si) and including aluminum (Al). Silicon content is typically governed by metallurgical processing concerns, but it can also be added for the purpose of improving oxidation resistance. Aluminum is used to improve oxidation resistance. It can also enhance the effects of heat treatment.

Iron (Fe) 69.7 to 75.1
Chromium (Cr) 23 to 26
Aluminum (Al) 1.2 to 1.7
Silicon (Si) 0.7 to 1.4
Manganese (Mn) 0 to 1.0
Carbon (C) 0 to 0.12
Phosphorus (P) 0 to 0.040
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 10095: Heat resisting steels and nickel alloys

Creep-Resistant Steels, Fujio Abe et al. (editors), 2008

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

Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993

Corrosion of Stainless Steels, A. John Sedriks, 1996

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