EN 1.4612 (X1CrNiMoAlTi12-11-2) Stainless Steel
EN 1.4612 stainless steel is a precipitation-hardening stainless steel formulated for primary forming into wrought products. 1.4612 is the EN numeric designation for this material. X1CrNiMoAlTi12-11-2 is the EN chemical designation.
It can have a fairly high tensile strength among the wrought precipitation-hardening stainless steels in the database.
The properties of EN 1.4612 stainless steel include three 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 1.4612 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
11 %
Fatigue Strength
860 to 950 MPa 120 to 140 x 103 psi
Impact Strength: V-Notched Charpy
11 to 22 J 8.3 to 17 ft-lb
Poisson's Ratio
0.28
Shear Modulus
76 GPa 11 x 106 psi
Shear Strength
1010 to 1110 MPa 150 to 160 x 103 psi
Tensile Strength: Ultimate (UTS)
1690 to 1850 MPa 250 to 270 x 103 psi
Tensile Strength: Yield (Proof)
1570 to 1730 MPa 230 to 250 x 103 psi
Thermal Properties
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
450 °C 840 °F
Maximum Temperature: Mechanical
790 °C 1450 °F
Melting Completion (Liquidus)
1450 °C 2640 °F
Melting Onset (Solidus)
1400 °C 2560 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
11 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
16 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
3.6 kg CO2/kg material
Embodied Energy
50 MJ/kg 21 x 103 BTU/lb
Embodied Water
140 L/kg 17 gal/lb
Common Calculations
PREN (Pitting Resistance)
19
Resilience: Ultimate (Unit Rupture Work)
190 to 210 MJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
60 to 65 points
Strength to Weight: Bending
40 to 43 points
Thermal Shock Resistance
58 to 63 points
Alloy Composition
Among wrought stainless steels, the composition of EN 1.4612 stainless steel is notable for including aluminum (Al) and titanium (Ti). Aluminum is used to improve oxidation resistance. It can also enhance the effects of heat treatment. Titanium is used to broadly improve mechanical properties.
| Fe | 71.5 to 75.5 | |
| Cr | 11 to 12.5 | |
| Ni | 10.2 to 11.3 | |
| Mo | 1.8 to 2.3 | |
| Al | 1.4 to 1.8 | |
| Ti | 0.2 to 0.5 | |
| Mn | 0 to 0.1 | |
| Si | 0 to 0.1 | |
| C | 0 to 0.015 | |
| P | 0 to 0.010 | |
| N | 0 to 0.010 | |
| S | 0 to 0.0050 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
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
Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012
Corrosion of Stainless Steels, A. John Sedriks, 1996
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010