In austenitic stainless steel, molybdenum is added to provide the components a stronger resistance to pitting and crevice corrosion. With just a minor increase in the amount of molybdenum in its alloy, an ASME SA269 TP317 Stainless Steel Tubes' chemistry is comparable to that of grade 316. When there is a significant concentration of chloride and sulfur ions in the medium, using this alloy is especially beneficial. Typically, steel alloys are quickly attacked by both sulfur and chloride. The alloys do not give way under strain, nevertheless, as molybdenum content in astm a269 tp 317 increases. ASTM A269 TP 317L Stainless Steel Seamless Pipes have higher creep qualities than the majority of traditional stainless steel grades, including grade 316.
Additionally, the alloy gives resistance to general corrosion at both extremes of temperature. The metal oxidizes, causing general or uniform corrosion, which accelerates at higher temperatures. In comparison to alloys 304 and 316, ASTM A269 TP317L stainless steel seamless tubes have a greater PREN value, which measures the alloy's resistance to pitting.
The astm a269 tp 317l Tubes are the low carbon, nitrogen-containing alloy of grade 317. The addition of nitrogen increases the yield strength and pitting resistance of ASTM A269 TP 317L Stainless Steel Tubes, much like it does with other austenitic stainless steel alloys. Alloy 317l and ASTM A269 TP317 Stainless Steel Pipe have a propensity for sharing mechanical and corrosion resistance characteristics. While intergranular corrosion would otherwise occur in the ASME SA269 TP317L Stainless Steel Tubes, the reduced carbon content of 317L prevents the production of carbide precipitates.
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Specification:
| Specification | Description |
| Standard | ASTM A269 |
| Material Grade | TP 317L (Austenitic Stainless Steel) |
| Tube Type | Seamless and Welded |
| Application | Corrosion-Resisting, High-Temperature Service |
| Corrosion Resistance | Excellent |
| Temperature Range | High-Temperature Service |
| Common Uses | Chemical and Petrochemical Processing, Power Plants, etc. |
| Cross-Sectional Shape | Round |
Chemical Composition of ASTM A269 TP 317L STAINLESS STEEL TUBES
| Element | Composition Range (%) |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 11.0 - 15.0 |
| Molybdenum (Mo) | 3.0 - 4.0 |
| Carbon (C) | Maximum 0.03 |
| Manganese (Mn) | Maximum 2.00 |
| Silicon (Si) | Maximum 0.75 |
| Phosphorus (P) | Maximum 0.045 |
| Sulfur (S) | Maximum 0.03 |
Mechanical Properties of ASTM A269 TP 317L STAINLESS STEEL TUBES
| Property | Value |
| Tensile Strength | 75,000 psi (515 MPa) minimum |
| Yield Strength | 30,000 psi (205 MPa) minimum |
| Elongation | 35% minimum |
| Hardness (Brinell) | 217 maximum (for annealed condition) |
Advantages of ASTM A269 TP 317L STAINLESS STEEL TUBES
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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