Phehlukwayo Metals based in Cape Town, South Africa, is a firm manufacturer and supplier of quality metals, providing different alloys for assorted industrial purposes. Specializing in Super Duplex Steel Forgings , this metal is renowned to be one of the strongest steels, long-lasting, with high resistance against corrosion. As such, these particular steels from Phehlukwayo Metals best suit the critical applications in chemical processing, in offshore oil and gas platforms, and marine contexts. The company ensures prompt delivery of prime quality Super Duplex Steel products-which include forging, valves and fittings-to rigorous standards to accommodate critical applications globally across a multitude of industries.
Super Duplex Steel forgings contain 50–55% iron, 22–25% chromium, 4–7% nickel, 3–5% molybdenum, 0.1–0.5% nitrogen, and small quantities of copper, manganese, and silicon. The alloy is resistant to corrosion, especially in chloride-rich environments. The material has a tensile strength of 800-1000 MPa and a yield strength of 550-700 MPa. The hardness is between 250 to 350 HV. It also has good ductility and toughness, with elongation usually in the range of 25-40%. The high resistance of the steel to stress corrosion cracking and pitting improves its performance in extreme conditions.
| Standard | ASTM A182, ASME SA182 |
| Specification | DIN, ASTM, BS and all International Standards |
| Flat bar blocks | up to 27″ width and 15,000 lbs. |
| Cylinders and sleeves | up to 50″ maximum O.D. and 65″ maximum length |
| Discs and hubs | up to 50″ diameter and 20,000 lbs. |
| Rolled, hand forged or mandrel forged rings | up to 84″ maximum O.D. and 40″ maximum length |
| Rounds, shafts and step shafts | up to 144″ maximum length and 20,000 lbs. |
| Forging Types | Impression Die Forging, Open Die Forging, Seamless Rolled Forging, Hot Forging, Cold Forging, Open die hammer forging, Impression die drop forging, Closed Die Forging, Press Forging, Upset Forging, Compression Forging, Swaging, Rotary Forging, Roll forging. |
To verify the quality of Super Duplex Steel forgings, check for certifications like ASTM, ASME, or ISO standards. Conduct tests such as mechanical property testing, chemical composition analysis, and non-destructive testing (NDT) like ultrasonic or magnetic particle inspections.
Compatible welding processes for Super Duplex Steel forgings include Tungsten Inert Gas (TIG), Metal Inert Gas (MIG), Shielded Metal Arc Welding (SMAW), and Submerged Arc Welding (SAW), using appropriate filler materials.
Super Duplex Steel forgings are governed by standards such as ASTM A182, ASTM A240, ASME SA-182, ASME SA-240, and EN 10088-3, which define material properties, chemical composition, and mechanical requirements.
The critical applications in which strength and other corrosion resistance and toughness properties are paramount use Super Duplex Steel forgings . They are more commonly used in the oil and gas sector for its subsea equipment, pressure vessel, and offshore platforms while accounting for materials that are exposed to high levels of chlorides. The forgings exhibit resistance to pit, crevice corrosion, and stress corrosion cracking in chemical processing, desalination plants, and marine work. Super Duplex Steel is used in heat exchangers, valves, pumps, and pipelines to ensure the long-lasting performance of the application in aggressive environments. Its high mechanical properties combined with its strength to resist elevated temperatures and pressure make it useful and reliable for various demanding applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Phehlukwayo Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Cape Town, South Africa
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