Latham Steel, based in the industrial heart of Hamilton, New Zealand, has built its reputation on a foundation of resilience and precision, much like the high-performance materials it supplies. We are proud to offer Alloy Steel WP91 Pipe Fittings, a product engineered to meet the extreme demands of modern industry. Sourced from trusted manufacturers, these components reflect our commitment to providing Hamilton’s key sectors with solutions that deliver uncompromising strength and reliability where it matters most.
The strength of WP91 comes from its sophisticated composition, which includes chromium, molybdenum, and vanadium, with a key addition of niobium. This specific blend gives the fittings exceptional mechanical properties, including very high tensile strength and remarkable toughness. Perhaps most importantly, it offers superior creep resistance, meaning it can maintain its integrity under immense pressure and intense heat over long periods without deforming, a critical feature for demanding applications.
Specifications : ASTM A234 / ASME SA234
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
| 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 |
| Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| A234 WP91 | ≥590 | ≥415 | ≥20 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
These robust properties make Alloy Steel WP91 Pipe Fittings ideal for the most challenging environments. You’ll typically find them in critical high-temperature and high-pressure systems, such as the power generation plants that form the backbone of our infrastructure. They are essential for constructing efficient fossil fuel and advanced thermal power systems, and they also play a vital role in the demanding petrochemical and refining industries, safely conveying steam and process fluids under extreme conditions.
Latham Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Hamilton, New Zealand.
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