UNS S20910 (22-13-5, 1.3964, XM-19) Stainless Steel
S20910 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. XM-19 is the ASTM designation for this material. 1.3964 is the EN numeric designation. S20910 is the UNS number. And 22-13-5 is the common industry name.
It has a moderately low thermal conductivity among wrought austenitic stainless steels. In addition, it has a moderately high embodied energy and can have a moderately low ductility.
The properties of S20910 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 S20910 stainless steel to: wrought austenitic 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
230 to 290
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
14 to 39 %
Fatigue Strength
310 to 460 MPa 45 to 67 x 103 psi
Poisson's Ratio
0.28
Reduction in Area
56 to 62 %
Shear Modulus
79 GPa 11 x 106 psi
Shear Strength
500 to 570 MPa 72 to 83 x 103 psi
Tensile Strength: Ultimate (UTS)
780 to 940 MPa 110 to 140 x 103 psi
Tensile Strength: Yield (Proof)
430 to 810 MPa 62 to 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
460 °C 860 °F
Maximum Temperature: Mechanical
1080 °C 1970 °F
Melting Completion (Liquidus)
1420 °C 2590 °F
Melting Onset (Solidus)
1380 °C 2510 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
13 W/m-K 7.7 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
22 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
4.8 kg CO2/kg material
Embodied Energy
68 MJ/kg 29 x 103 BTU/lb
Embodied Water
180 L/kg 22 gal/lb
Common Calculations
PREN (Pitting Resistance)
34
Resilience: Ultimate (Unit Rupture Work)
120 to 260 MJ/m3
Resilience: Unit (Modulus of Resilience)
460 to 1640 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
28 to 33 points
Strength to Weight: Bending
24 to 27 points
Thermal Diffusivity
3.6 mm2/s
Thermal Shock Resistance
17 to 21 points
Alloy Composition
Among wrought stainless steels, the composition of S20910 stainless steel is notable for including vanadium (V) and containing a comparatively high amount of manganese (Mn). Vanadium has a strong hardening effect, but this effect is particularly sensitive to the type of tempering. Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible.
| Fe | 52.1 to 62.1 | |
| Cr | 20.5 to 23.5 | |
| Ni | 11.5 to 13.5 | |
| Mn | 4.0 to 6.0 | |
| Mo | 1.5 to 3.0 | |
| Si | 0 to 0.75 | |
| N | 0.2 to 0.4 | |
| Nb | 0.1 to 0.3 | |
| V | 0.1 to 0.3 | |
| C | 0 to 0.060 | |
| P | 0 to 0.040 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A479: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005
ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
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