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EN 1.4542 (X5CrNiCuNb16-4) Stainless Steel

EN 1.4542 stainless steel is a precipitation-hardening stainless steel formulated for primary forming into wrought products. 1.4542 is the EN numeric designation for this material. X5CrNiCuNb16-4 is the EN chemical designation.

It has the highest electrical conductivity and a moderately low embodied energy among wrought precipitation-hardening stainless steels.

The properties of EN 1.4542 stainless steel include five 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 1.4542 stainless steel to: wrought precipitation-hardening 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

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

5.7 to 20 %

Fatigue Strength

370 to 640 MPa 54 to 93 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

76 GPa 11 x 106 psi

Shear Strength

550 to 860 MPa 79 to 120 x 103 psi

Tensile Strength: Ultimate (UTS)

880 to 1470 MPa 130 to 210 x 103 psi

Tensile Strength: Yield (Proof)

580 to 1300 MPa 84 to 190 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Maximum Temperature: Corrosion

440 °C 820 °F

Maximum Temperature: Mechanical

860 °C 1580 °F

Melting Completion (Liquidus)

1430 °C 2600 °F

Melting Onset (Solidus)

1380 °C 2520 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

16 W/m-K 9.3 BTU/h-ft-°F

Thermal Expansion

11 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

13 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

2.7 kg CO2/kg material

Embodied Energy

39 MJ/kg 17 x 103 BTU/lb

Embodied Water

130 L/kg 16 gal/lb

Common Calculations

PREN (Pitting Resistance)

17

Resilience: Ultimate (Unit Rupture Work)

62 to 160 MJ/m3

Resilience: Unit (Modulus of Resilience)

880 to 4360 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

31 to 52 points

Strength to Weight: Bending

26 to 37 points

Thermal Diffusivity

4.3 mm2/s

Thermal Shock Resistance

29 to 49 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4542 stainless steel is notable for including niobium (Nb) and copper (Cu). Niobium is primarily used to improve yield strength, particularly at elevated temperatures. Copper is used to improve resistance to acids, and to improve formability.

Iron (Fe) 69.6 to 79
Chromium (Cr) 15 to 17
Nickel (Ni) 3.0 to 5.0
Copper (Cu) 3.0 to 5.0
Manganese (Mn) 0 to 1.5
Silicon (Si) 0 to 0.7
Molybdenum (Mo) 0 to 0.6
Niobium (Nb) 0 to 0.45
Carbon (C) 0 to 0.070
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 10250-4: Open die steel forgings for general engineering purposes - Part 4: Stainless steels

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 Stainless Steels, A. John Sedriks, 1996

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