The low carbon variant of 316 stainless steel is ASTM A269 TP 316/316L Stainless Steel Pipes & Tubes. Because of the steel's resistance to boundary carbide precipitation (sensitisation), it is frequently used in situations with severe corrosion. Weld annealing is only necessary when the material will be utilized in high stress situations; the material is commonly employed in large gauge welded components. Due to its strong corrosion resistance, 316L has a wide range of applications, particularly in maritime applications.
ASTM A269 TP 316/316L Stainless Steel Tubes represent a specific category of stainless steel tubing that conforms to the ASTM A269 standard. This widely recognized standard, established by the American Society for Testing and Materials (ASTM), defines the requirements for both seamless and welded austenitic stainless steel tubes. These tubes are engineered to exhibit remarkable resistance to general corrosion and to perform effectively across a broad spectrum of temperature settings.
The designation "TP 316/316L" signifies that these tubes fall within the "Tube, Pipe" category and are composed of stainless steel grades 316 and 316L. Stainless steel grade 316, renowned for its high chromium and nickel content, is celebrated for its exceptional corrosion resistance, rendering it particularly suitable for applications exposed to corrosive substances, including chlorides and acids. The inclusion of molybdenum enhances its resistance to certain aggressive environments. In contrast, grade 316L, featuring reduced carbon content compared to 316, not only maintains the robust corrosion resistance but also excels in preserving corrosion resistance in welded structures due to its minimized susceptibility to sensitization.
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Specification:
| Specification | Description |
| Standard | ASTM A269 |
| Material Grade | TP 316 (Austenitic Stainless Steel) |
| TP 316L (Austenitic Stainless Steel) | null |
| Tube Type | Seamless and Welded |
| Application | General Corrosion-Resisting, Wide Temperature Range |
| Corrosion Resistance | Excellent |
| Temperature Range | Low- and High-Temperature Service |
| Common Uses | Chemical Processing, Petrochemical, Marine, etc. |
| Cross-Sectional Shape | Round |
Chemical Composition of ASTM A269 TP 316/316L STAINLESS STEEL TUBES
| Element | Composition Range (%) |
| Chromium (Cr) | 16.0 - 18.0 |
| Nickel (Ni) | 10.0 - 14.0 |
| Molybdenum (Mo) | 2.0 - 3.0 |
| Carbon (C) | Maximum 0.08 |
| Manganese (Mn) | Maximum 2.00 |
| Silicon (Si) | Maximum 1.00 |
| Phosphorus (P) | Maximum 0.045 |
| Sulfur (S) | Maximum 0.030 |
| Iron (Fe) | Balance (remainder) |
Mechanical Properties of ASTM A269 TP 316/316L STAINLESS STEEL TUBES
| Property | Value |
| Tensile Strength | 70,000 psi (485 MPa) minimum |
| Yield Strength | 25,000 psi (170 MPa) minimum |
| Elongation | 40% minimum |
| Hardness (Brinell) | 217 maximum (for annealed condition) |
Advantages of ASTM A269 TP 316/316L 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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Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
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