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EN 1.4313 (X3CrNiMo13-4) Stainless Steel

EN 1.4313 stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. 1.4313 is the EN numeric designation for this material. X3CrNiMo13-4 is the EN chemical designation.

This material is well established: the Further Reading section below cites a number of published standards, and that list is not necessarily exhaustive.

It has a moderately high base cost among the wrought martensitic stainless steels in the database.

The properties of EN 1.4313 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 1.4313 stainless steel to: wrought martensitic 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

200 GPa 28 x 106 psi

Elongation at Break

12 to 17 %

Fatigue Strength

340 to 510 MPa 50 to 73 x 103 psi

Impact Strength: V-Notched Charpy

55 to 70 J 41 to 51 ft-lb

Poisson's Ratio

0.28

Shear Modulus

76 GPa 11 x 106 psi

Shear Strength

460 to 600 MPa 66 to 87 x 103 psi

Tensile Strength: Ultimate (UTS)

750 to 1000 MPa 110 to 150 x 103 psi

Tensile Strength: Yield (Proof)

580 to 910 MPa 84 to 130 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Maximum Temperature: Corrosion

390 °C 740 °F

Maximum Temperature: Mechanical

780 °C 1430 °F

Melting Completion (Liquidus)

1450 °C 2630 °F

Melting Onset (Solidus)

1400 °C 2560 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

25 W/m-K 14 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.9 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

2.4 kg CO2/kg material

Embodied Energy

34 MJ/kg 14 x 103 BTU/lb

Embodied Water

110 L/kg 13 gal/lb

Common Calculations

PREN (Pitting Resistance)

15

Resilience: Ultimate (Unit Rupture Work)

110 to 150 MJ/m3

Resilience: Unit (Modulus of Resilience)

870 to 2100 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

27 to 36 points

Strength to Weight: Bending

23 to 28 points

Thermal Diffusivity

6.7 mm2/s

Thermal Shock Resistance

27 to 36 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4313 stainless steel is notable for containing comparatively high amounts of nickel (Ni) and chromium (Cr). Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion. Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance.

Iron (Fe)Fe 78.5 to 84.2
Chromium (Cr)Cr 12 to 14
Nickel (Ni)Ni 3.5 to 4.5
Manganese (Mn)Mn 0 to 1.5
Molybdenum (Mo)Mo 0.3 to 0.7
Silicon (Si)Si 0 to 0.7
Carbon (C)C 0 to 0.050
Phosphorus (P)P 0 to 0.040
Nitrogen (N)N 0 to 0.020
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 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes

Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016

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