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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.

Iron (Fe) 49.2 to 58.5
Nickel (Ni) 24 to 27
Chromium (Cr) 13.5 to 16
Titanium (Ti) 1.9 to 2.3
Manganese (Mn) 1.0 to 2.0
Molybdenum (Mo) 1.0 to 1.5
Silicon (Si) 0 to 1.0
Vanadium (V) 0.1 to 0.5
Aluminum (Al) 0 to 0.35
Carbon (C) 0.030 to 0.080
Phosphorus (P) 0 to 0.025
Sulfur (S) 0 to 0.015
Boron (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