Ferdi Fittings, located in Istanbul, Turkey, stands out as a top manufacturer and supplier of high-quality Alloy Steel WP91 Buttweld Fittings. With years of experience in the industrial fittings arena, Ferdi Fittings is dedicated to providing products that not only meet international standards but also guarantee durability, precision, and reliability. Their WP91 Buttweld Fittings are crafted for seamless integration into piping systems, serving various industries like power generation, oil and gas, petrochemical, and chemical processing. By merging cutting-edge manufacturing techniques with rigorous quality control, Ferdi Fittings ensures that each product delivers optimal performance even under high-pressure and high-temperature conditions.
| Specifications | : | ASTM A234 / ASME SA234 |
| Size | : | 1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated) |
| Standards | : | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Thickness | : | Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS |
| Type | : | Seamless / Welded / Fabricated |
Alloy Steel WP91 Buttweld Fittings are mainly made up of chromium (8–9%), molybdenum (0.9–1.0%), along with small amounts of vanadium, niobium, and carbon, which contribute to their impressive strength and resistance to corrosion. These fittings boast remarkable mechanical properties, such as high tensile strength, yield strength, and hardness, making them perfect for extreme environments. Their outstanding resistance to creep and thermal fatigue guarantees long-lasting performance in high-temperature applications. The precision engineering involved in forging and heat treatment further enhances their dimensional stability, weldability, and impact resistance, making them a dependable choice for critical piping systems in demanding industrial sectors.
| Grade | C | Mn | Si | S | P | Cr | Mo |
| A234 WP91 | 0.08-0.12 | 0.3-0.6 | 0.2-0.5 | ≤0.02 | ≤0.015 | 8-9.5 | 0.85-1.05 |
| Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| A234 WP91 | ≥590 | ≥415 | ≥20 |
Ferdi Fittings one of the largest suppliers of Alloy Steel WP91 Buttweld Fittings in Istanbul, Turkey. We specialize in providing a wide range of high-quality, durable fittings for various industrial applications. Our inventory includes elbows, tees, reducers, couplings, and other essential fittings designed to offer exceptional corrosion resistance and strength. Alloy Steel WP91 is known for its cost-effectiveness and excellent mechanical properties, making it ideal for industries such as construction, chemical processing, and food processing. With a commitment to customer satisfaction, timely delivery, and competitive pricing, we are the trusted choice for Alloy Steel WP91 Buttweld Fittings in the Turkey.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Alloy Steel WP91 Buttweld Fittings from Ferdi Fittings offer exceptional corrosion resistance, especially in seawater and harsh environments. They are known for their high strength, durability, and resistance to pitting and crevice corrosion, ensuring long-lasting performance. We provide precise manufacturing, quality control, and reliable service for diverse industrial applications.
Alloy Steel WP91 Buttweld Fittings offer numerous advantages, especially in high-temperature and high-pressure applications. Their composition, featuring chromium and molybdenum, provides outstanding resistance to oxidation, corrosion, and thermal fatigue. WP91 fittings are known for their excellent weldability, strength, and durability, ensuring long-term performance in demanding industries like power generation, petrochemical, and oil & gas. They maintain structural integrity even under extreme conditions, reducing the risk of failure. Additionally, WP91 Fittings require minimal maintenance and offer cost-effective solutions due to their longevity, making them a reliable choice for critical systems in challenging environments.
Yes, custom sizes are available for Alloy Steel WP91 Buttweld Fittings to meet specific requirements. We offer tailored solutions to ensure precise fit and performance for various applications. For more information, please contact us at sales@ferdifittings.com.
Alloy Steel WP91 Buttweld Fittings are extensively utilized in industries that require robust, corrosion-resistant piping solutions. They are particularly well-suited for high-pressure pipelines in power plants, chemical processing facilities, and oil and gas operations. Their ability to resist oxidation and scaling at elevated temperatures makes them ideal for steam lines, heat exchangers, and boiler systems. Moreover, they find applications in refineries and petrochemical plants for transporting aggressive fluids and gases. The durability of these fittings, along with their capacity to maintain integrity under thermal stress, ensures safety and reliability in various industrial applications.
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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