EN 1.4371 (X2CrMnNiN17-7-5) Stainless Steel
EN 1.4371 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. 1.4371 is the EN numeric designation for this material. X2CrMnNiN17-7-5 is the EN chemical designation.
It has a moderately high electrical conductivity among wrought austenitic stainless steels. In addition, it has a moderately low base cost and a moderately low embodied energy.
The properties of EN 1.4371 stainless steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4371 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
220 to 230
Elastic (Young's, Tensile) Modulus
200 GPa 28 x 106 psi
Elongation at Break
45 to 51 %
Fatigue Strength
290 to 340 MPa 42 to 49 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
77 GPa 11 x 106 psi
Shear Strength
520 to 540 MPa 75 to 78 x 103 psi
Tensile Strength: Ultimate (UTS)
740 to 750 MPa 110 x 103 psi
Tensile Strength: Yield (Proof)
320 to 340 MPa 46 to 50 x 103 psi
Thermal Properties
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
410 °C 770 °F
Maximum Temperature: Mechanical
880 °C 1610 °F
Melting Completion (Liquidus)
1410 °C 2570 °F
Melting Onset (Solidus)
1370 °C 2490 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
15 W/m-K 8.7 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.5 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.9 % IACS
Otherwise Unclassified Properties
Base Metal Price
12 % relative
Density
7.7 g/cm3 480 lb/ft3
Embodied Carbon
2.6 kg CO2/kg material
Embodied Energy
38 MJ/kg 16 x 103 BTU/lb
Embodied Water
140 L/kg 17 gal/lb
Common Calculations
PREN (Pitting Resistance)
20
Resilience: Ultimate (Unit Rupture Work)
270 to 310 MJ/m3
Resilience: Unit (Modulus of Resilience)
250 to 300 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
27 points
Strength to Weight: Bending
24 points
Thermal Diffusivity
4.0 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4371 stainless steel is notable for containing a comparatively high amount of manganese (Mn). Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible.
| Fe | 66.7 to 74.4 | |
| Cr | 16 to 17.5 | |
| Mn | 6.0 to 8.0 | |
| Ni | 3.5 to 5.5 | |
| Si | 0 to 1.0 | |
| Cu | 0 to 1.0 | |
| N | 0.15 to 0.25 | |
| P | 0 to 0.045 | |
| C | 0 to 0.030 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
EN 10088-1: Stainless steels - Part 1: List of stainless steels
Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012
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