UNS N08135 Iron-Nickel-Chromium Alloy
N08135 stainless steel is a superaustenitic (highly alloyed) stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed (AT) condition.
It has a fairly high ductility among wrought superaustenitic stainless steels. In addition, it has a very high base cost and a fairly high embodied energy.
The graph bars on the material properties cards below compare N08135 stainless steel to: wrought superaustenitic 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 30 x 106 psi
Elongation at Break
46 %
Fatigue Strength
220 MPa 32 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
80 GPa 12 x 106 psi
Shear Strength
400 MPa 58 x 103 psi
Tensile Strength: Ultimate (UTS)
570 MPa 83 x 103 psi
Tensile Strength: Yield (Proof)
240 MPa 35 x 103 psi
Thermal Properties
Latent Heat of Fusion
310 J/g
Maximum Temperature: Corrosion
430 °C 810 °F
Maximum Temperature: Mechanical
1100 °C 2010 °F
Melting Completion (Liquidus)
1440 °C 2630 °F
Melting Onset (Solidus)
1390 °C 2540 °F
Specific Heat Capacity
460 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
16 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
39 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
6.8 kg CO2/kg material
Embodied Energy
94 MJ/kg 41 x 103 BTU/lb
Embodied Water
220 L/kg 27 gal/lb
Common Calculations
PREN (Pitting Resistance)
38
Resilience: Ultimate (Unit Rupture Work)
210 MJ/m3
Resilience: Unit (Modulus of Resilience)
140 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
19 points
Thermal Shock Resistance
13 points
Alloy Composition
Among wrought stainless steels, the composition of N08135 stainless steel is notable for including tungsten (W) and containing a comparatively high amount of nickel (Ni). Tungsten interacts with other alloying elements to a greater extent than usual, which makes it hard to broadly characterize its effects. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.
| Fe | 30.2 to 42.3 | |
| Ni | 33 to 38 | |
| Cr | 20.5 to 23.5 | |
| Mo | 4.0 to 5.0 | |
| Mn | 0 to 1.0 | |
| W | 0.2 to 0.8 | |
| Si | 0 to 0.75 | |
| Cu | 0 to 0.7 | |
| C | 0 to 0.030 | |
| P | 0 to 0.030 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B622: Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube
Nickel Alloys, Ulrich Heubner (editor), 1998
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
Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010