Seamless Stainless Steel 314 Pipe utilizes a high chromium-nickel austenitic alloy renowned for its outstanding resistance to oxidation and high temperature strength. This material performs exceptionally well in extreme thermal environments, resisting scale and maintaining structural integrity, while its high chromium content provides superior corrosion resistance for demanding applications.
Chemical Composition
| Grade | C | Mn | P | S | Si | Cr | Ni |
| 314 | ≤0.25 | ≤2.00 | ≤0.045 | ≤0.030 | 1.50－3.00 | 23.00－26.00 | 19.00－22.00 |
Overview
The austenitic microstructure provides non-magnetic properties and excellent ductility, making TP304 suitable for both low and moderate temperature applications. While not optimized for extreme high-temperature service, it excels in general corrosion resistance across a wide range of environments, making it a staple in industries where reliability and versatility are paramount.
Features
General-Purpose Corrosion Resistance: Resistant to atmospheric corrosion, mild acids (e.g., nitric acid), alkalis, and organic compounds. While not ideal for chloride-rich environments like seawater, it outperforms carbon steel in most aqueous solutions.
Excellent Formability & Weldability: Easily cold-formed into complex shapes without cracking and weldable using all standard methods (GTAW, GMAW, SMAW) without post-weld heat treatment, though low-carbon fillers (e.g., 308L) are recommended for critical applications.
Temperature Resistance: Operates reliably from -196°C (cryogenic) up to 870°C in intermittent service, with good oxidation resistance below 650°C. Cold working can enhance tensile strength without compromising ductility.
Hygienic & Aesthetic Properties: Smooth surface finish resists bacterial adhesion and is easy to clean, making it suitable for food contact and architectural applications.
Application
Food & Beverage: Used in processing equipment, storage tanks, and pipelines for dairy, brewing, and meat processing, meeting strict hygiene standards (FDA, 3-A Sanitary).
Architectural & Construction: Employed in decorative railings, facades, and roofing due to its corrosion resistance and attractive appearance, especially in urban environments with moderate pollution.
Chemical Processing: Handles non-chlorinated organic acids and alkalis in reactors, heat exchangers, and pumps, though upgraded grades like 316L are preferred for aggressive chlorides.
Medical Devices: Used in surgical instruments and hospital equipment due to biocompatibility and ease of sterilization.
