Heer Fittings is a trusted Alloy Steel WP91 Buttweld Fittings manufacturer and supplier located in Delhi, India, with high-performance piping fittings designed for harsh pressure and temperature conditions. The fittings, which come in the form of elbows, tees, reducers, caps, and crosses, are manufactured in compliance with ASTM A234 and ASME B16.9 standards. Alloy Steel WP91 is a high-strength, creep-resistant alloy having higher amounts of chromium and molybdenum for high thermal stability and oxidation resistance. Heer Fittings maintains precision, durability, and quality control in all product lines with applications in industries like power generation, petrochemicals, and oil & gas.
| 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 is mostly made up of 8–9.5% chromium and 0.85–1.05% molybdenum, along with other vanadium, niobium, and nitrogen for better mechanical performance. It provides about 585 MPa tensile strength, minimum yield strength of 415 MPa, and elongation of 20–25%. The alloy maintains strength and creep resistance until the temperature of 650°C (1200°F), making it applicable for long-term operation in high-temperature and high-pressure conditions. WP91 is also very weldable and structurally sound when thermal cycling.
| 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 |
Heer Fittings one of the largest suppliers of Alloy Steel WP91 Buttweld Fittings in Delhi, India. 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 India.
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 Heer 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.
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@heerfittings.com.
Alloy Steel WP91 Buttweld Fittings are used comprehensively in high-temperature and high-pressure steam systems, such as superheaters, reheaters, boiler tubes, heat exchangers, and nuclear power systems. These fittings are perfect for those applications that require extended service in a state of extreme stress and temperature where oxidation, thermal fatigue, and creep deformation resistance is required. Their high mechanical characteristics and metallurgical stability provide safety and extended service life in demanding power and process piping systems and render them a system of choice for sophisticated thermal 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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