EN 1.4980 (X6NiCrTiMoVB25-15-2) Stainless Steel
EN 1.4980 stainless steel is a precipitation-hardening stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the aged (precipitation hardened) condition. 1.4980 is the EN numeric designation for this material. X6NiCrTiMoVB25-15-2 is the EN chemical designation.
It has a moderately high base cost among wrought precipitation-hardening stainless steels. In addition, it has the lowest thermal conductivity and a moderately high embodied energy.
The graph bars on the material properties cards below compare EN 1.4980 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
17 %
Fatigue Strength
410 MPa 60 x 103 psi
Impact Strength: V-Notched Charpy
57 J 42 ft-lb
Poisson's Ratio
0.29
Shear Modulus
75 GPa 11 x 106 psi
Shear Strength
630 MPa 92 x 103 psi
Tensile Strength: Ultimate (UTS)
1030 MPa 150 x 103 psi
Tensile Strength: Yield (Proof)
680 MPa 98 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
780 °C 1430 °F
Maximum Temperature: Mechanical
920 °C 1690 °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
13 W/m-K 7.5 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.1 % IACS
Otherwise Unclassified Properties
Base Metal Price
26 % relative
Density
7.9 g/cm3 500 lb/ft3
Embodied Carbon
6.0 kg CO2/kg material
Embodied Energy
87 MJ/kg 37 x 103 BTU/lb
Embodied Water
170 L/kg 20 gal/lb
Common Calculations
PREN (Pitting Resistance)
19
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m3
Resilience: Unit (Modulus of Resilience)
1180 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
36 points
Strength to Weight: Bending
28 points
Thermal Diffusivity
3.5 mm2/s
Thermal Shock Resistance
22 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4980 stainless steel is notable for including boron (B) and vanadium (V). Boron is used to improve hardenability. It has a substantial effect when added in even tiny amounts. It can also facilitate sintering. Vanadium has a strong hardening effect, but this effect is particularly sensitive to the type of tempering.
| Fe | 49.2 to 58.5 | |
| Ni | 24 to 27 | |
| Cr | 13.5 to 16 | |
| Ti | 1.9 to 2.3 | |
| Mn | 1.0 to 2.0 | |
| Mo | 1.0 to 1.5 | |
| Si | 0 to 1.0 | |
| V | 0.1 to 0.5 | |
| Al | 0 to 0.35 | |
| C | 0.030 to 0.080 | |
| P | 0 to 0.025 | |
| S | 0 to 0.015 | |
| B | 0.0030 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10302: Creep resisting steels, nickel and cobalt alloys
EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016
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