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.
| Fe | 78.5 to 84.2 | |
| Cr | 12 to 14 | |
| Ni | 3.5 to 4.5 | |
| Mn | 0 to 1.5 | |
| Mo | 0.3 to 0.7 | |
| Si | 0 to 0.7 | |
| C | 0 to 0.050 | |
| P | 0 to 0.040 | |
| N | 0 to 0.020 | |
| 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