Stainless Steel - Grade 317 / 1.4449
Description
Stainless Steel Grade 317/1.4449 is an austenitic stainless steel known for its high strength and excellent corrosion resistance, particularly in environments exposed to chlorides. It is primarily used in applications where resistance to pitting and crevice corrosion is essential.
Chemical Composition
The typical chemical composition of Grade 317 is as follows:
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.03 Max |
| Silicon (Si) | 0.75 Max |
| Manganese (Mn) | 2.0 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.03 Max |
| Chromium (Cr) | 18.0 - 20.0 |
| Molybdenum (Mo) | 3.0 - 4.0 |
| Nickel (Ni) | 11.0 - 15.0 |
| Nitrogen (N) | 0.10 Max |
| Iron (Fe) | Balance |
Mechanical Properties
The mechanical properties of Grade 317 are as follows:
| Property | Value |
|---|---|
| Ultimate Tensile Strength (ksi) | 75 Min |
| 0.2% Yield Strength (ksi) | 30 Min |
| Elongation (%) | 35% |
| Hardness (Brinell) | 217 Max |
Thermal & Physical Properties
Other Designations
Fabrication and Heat Treatment
Grade 317 can be fabricated using standard techniques such as welding, machining, and forming. It is readily weldable using conventional methods, but it is recommended to use filler metals with a higher molybdenum content for optimal results. Heat treatment is not typically required for this grade, but annealing can be performed at temperatures between 1010-1120°C.
Applications
Common applications of Grade 317 include:
Supplied Forms
Grade 317 is available in various forms, including:
Features
This datasheet provides a comprehensive overview of Stainless Steel Grade 317, including its properties, applications, and specifications.