UNS S35140 Stainless Steel
S35140 stainless steel is a superaustenitic (highly alloyed) stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition.
It has a fairly high thermal conductivity among wrought superaustenitic stainless steels. In addition, it has a moderately low ductility and a moderately low base cost.
The graph bars on the material properties cards below compare S35140 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
Brinell Hardness
210
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
34 %
Fatigue Strength
250 MPa 36 x 103 psi
Poisson's Ratio
0.28
Rockwell B Hardness
88
Shear Modulus
78 GPa 11 x 106 psi
Shear Strength
460 MPa 67 x 103 psi
Tensile Strength: Ultimate (UTS)
690 MPa 100 x 103 psi
Tensile Strength: Yield (Proof)
310 MPa 45 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
500 °C 930 °F
Maximum Temperature: Mechanical
1100 °C 2000 °F
Melting Completion (Liquidus)
1420 °C 2590 °F
Melting Onset (Solidus)
1370 °C 2500 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
14 W/m-K 8.0 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
1.9 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.0 g/cm3 500 lb/ft3
Embodied Carbon
5.5 kg CO2/kg material
Embodied Energy
78 MJ/kg 33 x 103 BTU/lb
Embodied Water
190 L/kg 23 gal/lb
Common Calculations
PREN (Pitting Resistance)
28
Resilience: Ultimate (Unit Rupture Work)
190 MJ/m3
Resilience: Unit (Modulus of Resilience)
250 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
22 points
Thermal Diffusivity
3.7 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
Among wrought stainless steels, the composition of S35140 stainless steel is notable for containing a comparatively high amount of manganese (Mn) and including niobium (Nb). Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible. Niobium is primarily used to improve yield strength, particularly at elevated temperatures.
| Fe | 44.1 to 52.7 | |
| Ni | 25 to 27 | |
| Cr | 20 to 22 | |
| Mn | 1.0 to 3.0 | |
| Mo | 1.0 to 2.0 | |
| Nb | 0.25 to 0.75 | |
| Si | 0 to 0.75 | |
| N | 0.080 to 0.2 | |
| C | 0 to 0.1 | |
| P | 0 to 0.045 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
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
Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011
Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010