ASTM A358 TP316L Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
ASTM A358 TP316L Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
With over 35 years of industrial expertise and a global supply network spanning 85 countries, YUHONG Group is a leading specialist in advanced stainless steel tubing solutions. We are dedicated to engineering products that meet the most stringent international standards for critical applications. Our ASTM A358 TP316L Electric-Fusion-Welded (EFW) Austenitic Stainless Steel Pipe exemplifies this commitment, combining superior molybdenum-enhanced corrosion resistance with the reliable, high-integrity construction of the EFW process. Designed for demanding service in chemical processing, marine environments, and high-purity systems, our pipes deliver the durability, safety, and performance required for your most challenging projects. Trust in our experience, quality certifications, and global logistical support for a seamless supply of premium piping components.
Welding Filler Metal Reference for Grade 316L (UNS S31603)
| ASTM Plate Specification No. and Grade | A240/A240M Type 316L | Base metal specification |
| Filler Metal per AWS A5.4/A5.4M | Classification: E316L | Covered electrodes (Stick welding) |
| UNS: W31613 | ||
| Filler Metal per AWS A5.9/A5.9M | Classification: ER316L | Bare wire (TIG, MIG welding) |
| UNS: S31683 | ||
| Filler Metal per AWS A5.22/A5.22M | Classification: E316LT | Flux-cored electrodes |
| UNS: W31635 | ||
| Filler Metal per AWS A5.30/A5.30M | Classification: IN316L | Bare rods and electrodes |
| UNS: S31683 |
Typical Solution Annealing Requirements for 316L (UNS S31603)
| Parameter | Typical Requirement | Purpose / Notes |
| Grade | 316L (UNS S31603) | Austenitic Stainless Steel |
| Process | Solution Anneal | To dissolve carbides and obtain a uniform austenitic microstructure. |
| Temperature Range | 1040 - 1150 °C (1900 - 2100 °F) | Must achieve full solution of alloying elements. |
| Cooling Method | Rapid Cooling (Water Quench or equivalent) | To prevent the reprecipitation of carbides (especially chromium carbides) during cooling, which is critical for maintaining corrosion resistance. |
| Key Verification | Capability to pass intergranular corrosion test (e.g., ASTM A262 Practice E) | Ensures the material is in a non-sensitized condition. |
Testing Requirements for 316L (UNS S31603) per ASTM A358
| Test Category | Specific Test | Class 1 | Class 2 | Class 3 | Class 4 | Class 5 |
| Welding Process | - | Double-sided, filler metal | Double-sided, filler metal | Single-sided, filler metal | Single-sided (may be without internal filler) | Double-sided, filler metal |
| Nondestructive Examination (NDE) | Radiographic Testing (RT) | 100% | Not Required | 100% | 100% | Spot |
| Ultrasonic Testing (UT) | (Alternative or supplementary to RT) | (Alternative or supplementary to RT) | (Alternative or supplementary to RT) | (Alternative or supplementary to RT) | (Alternative or supplementary to RT) | |
| Mandatory Tests for All Classes | Hydrostatic Test or Nondestructive Electric Test | Yes (Each pipe) | Yes (Each pipe) | Yes (Each pipe) | Yes (Each pipe) | Yes (Each pipe) |
| Transverse Tension Test | Yes (Per lot) | Yes (Per lot) | Yes (Per lot) | Yes (Per lot) | Yes (Per lot) | |
| Transverse Guided-Bend Test | Yes (Per lot) | Yes (Per lot) | Yes (Per lot) | Yes (Per lot) | Yes (Per lot) | |
| Supplementary Tests (Optional) | Intergranular Corrosion Test | Optional | Optional | Optional | Optional | Optional |
| Product Analysis | Optional | Optional | Optional | Optional | Optional | |
| Hardness Test | Optional | Optional | Optional | Optional | Optional |
Application Advantages of ASTM A358 TP316L Electric-Fusion-Welded Stainless Steel Pipe
- Excellent Corrosion Resistance, Especially to Chlorides: The TP316L grade contains 2-3% Molybdenum, which provides superior resistance to pitting and crevice corrosion in environments containing chlorides (e.g., seawater, chemical brines) compared to standard 304 grades. This makes it ideal for chemical processing and marine applications.
- Cost-Effective for Large Diameter Piping: The Electric-Fusion-Welding (EFW) process allows for the economical production of large-diameter pipes (OD 1/2" to 24" as per ASTM A358) that are difficult or very costly to manufacture as seamless tubes, offering a great balance of performance and value for big pipeline projects.
- High Integrity Welded Construction: The longitudinal weld seam created by the EFW process is of high quality and consistency. When combined with full solution annealing heat treatment, it results in a pipe with reliable mechanical properties and corrosion resistance along the weld, suitable for pressure applications.
- Suitable for Hygienic and High-Purity Systems: The austenitic structure and smooth internal surface (which can be electropolished) make this pipe suitable for industries with high hygiene standards, such as pharmaceutical, food & beverage, and bioprocessing, where cleanability and corrosion resistance are critical.
- Proven Performance to International Standards: Manufactured in strict compliance with ASTM A358/ASME SA358, ensuring consistent material quality, dimensions, and performance. This guarantees reliability and simplifies approval for use in global industrial projects.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.