Teerasil Fittings and Plates, Thailand-based, is a reliable producer and supplier of high-performance piping products, such as **Stainless Steel 348/348H forged fittings**. These forged fittings are specifically made for high-temperature, high-pressure, and corrosive services where superior mechanical strength and resistance to intergranular corrosion are demanded. Stainless Steel 348/348H is a niobium-stabilized austenitic stainless steel, analogous to 347/347H, and is ideally suitable for continuous heating and welding applications. Teerasil produces all the fittings to international standards like ASTM A182, offering reliable solutions to industries like power generation, chemical processing, oil and gas, and aerospace.
Specifications : ASTM A403 / ASME SA403
Dimensions : ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size : 1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
Type : Seamless / Welded / Fabricated
Bending Radius : R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Thickness : Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS
Stainless Steel 348/348H forged fittings contain 17–20% chromium and 9–13% nickel, which are stabilized with niobium (columbium) to avoid carbide precipitation on welding and prolonged exposure to heat. Grade 348H has a higher content of carbon (0.04–0.10%) for greater creep strength and thermal stability. These fittings provide tensile strength of around 515 MPa and yield strength of 205 MPa. Forging improves grain structure, which leads to better fatigue resistance, mechanical integrity, and pressure performance—making it suitable for severe operating conditions.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 348/348H | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 10 | – |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Teerasil Fittings is a leading supplier of Stainless Steel 348/348H Forged Fittings in Bangkok, Thailand. We offer an extensive range of Stainless Steel 348/348H Forged Fittings, renowned for their excellent corrosion resistance and high strength, which makes them perfect for demanding industrial applications like chemical processing, marine environments, and high-temperature systems. With a commitment to quality and reliable delivery, we ensure our clients receive top-tier products tailored to meet the specific needs of various industries.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choose Stainless Steel 348/348H Forged Fittings from Teerasil Fittings for superior quality, exceptional corrosion resistance, and reliable performance in extreme conditions. We offer customized solutions backed by expert support and industry experience.
Stainless steel 348/348H forged fittings offer many advantages, including superior resistance to intergranular corrosion especially in high temperature environments Stable alloy and niobium ensure improved strength and weldability, making it ideal for rugged applications as power plants and petrochemical industries without losing its mechanical properties are designed to withstand temperatures up to 1600°F (870°C) temperature. High tensile strength, excellent durability, and resistance to oxidation and scaling make it durable and reliable. Furthermore, its corrosion resistance enhances durability and maintenance-free operation in harsh industrial environments.
Yes, custom sizes for Stainless Steel 348/348H Forged Fittings are available at Teerasil Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@teerasilfittings.com
Stainless Steel 348/348H forged fittings find extensive applications in harsh industrial processes where higher temperature, thermal cycling, and corrosive environment exist. In power plants, they are utilized in boilers, superheaters, and heat exchangers. In the chemical and petrochemical industries, they deal with hostile media in high-pressure applications. They are also used in refineries, aerospace equipment, and exhaust systems where oxidation resistance and thermal stability play vital roles. These engineered fittings provide leak-free, long-term operation in piping systems that operate under extreme heat, pressure, and corrosive conditions.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.
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