For many decades, Special Quality Alloys has been the preferred supplier of round bar stock in nickel alloys and high‑grade stainless steels, trusted for use in the most demanding environments.
With a strong focus on the oil & gas, aerospace and defence sectors, our comprehensive understanding of material grades and industry specifications has earned us a reputation for trust and reliability. Customers operating in critical environments rely on our knowledge, consistency and proven performance.
Raw material quality and integrity are fundamental to everything we do. By maintaining long‑term partnerships with the world’s foremost speciality mills, we secure reliable access to critical material grades and guarantee the standards required for demanding applications.
An integrated company structure complements our commitment to superior service by removing barriers and enabling high‑efficiency support for industry requirements. By utilising our in‑house heat treatment, testing and machining capabilities, we maintain full control of the process and deliver a true metals management service.
Combining our strength in stock, metallurgical excellence and the support of our group companies, we operate from an elevated position in the global market — a position recognised and trusted by major OEMs across critical industries.
UNS NO7718, API6A CRA, NACE MR 0175/ISO15156, AMS 5662/5663, W2.4668
A versatile nickel‑chromium alloy offering high strength and exceptional corrosion resistance, proven in some of the world’s most demanding environments. Its performance makes it a trusted choice across the oil & gas and aerospace sectors.
Typical applications:
Primarily for the gate valve market, we convert our own Alloy 718 ingot inventory into forged flat bar which is fully compliant with API6A CRA and NACE MR0175 requirements. Our specialist teams will maintain extensive stock levels and manufacture to bespoke customer requirements.
Alloy 718 - Tubing/Casing Hangers
Utilising our strategic stock of pre‑qualified large diameter forged bar in Alloy 718, along with on‑site group machining capabilities, we can supply proof machined tubing and casing hangers to meet our customers’ specific requirements. Additional material grade options are also available.
UNS NO6625, ASTM B446/B564, AMS 5666, W2.4856
A nickel‑chromium alloy offering excellent corrosion resistance in the annealed condition. With superior weldability and proven reliability, it is widely used in the manufacture of critical components.
Typical applications:
UNS NO7725, ASTM B805, API6A CRA, NACE MR-0175/ISO15156
A nickel‑chromium‑molybdenum‑niobium alloy engineered to deliver the corrosion resistance of Alloy 625 while providing the high‑strength characteristics associated with Alloy 718.
Typical applications:
UNS NO9925, API6A CRA, NACE MR 0175/ISO15156
A nickel‑iron‑chromium alloy offering high strength and excellent corrosion resistance. Its proven performance makes it a reliable choice for demanding environments across the oil & gas sector and other critical industries.
Typical applications:
Primarily for the gate valve market, we convert our own Alloy 925 ingot inventory into forged flat bar which is fully compliant with API6A CRA and NACE MR0175 requirements. Our specialist teams will maintain extensive stock levels and manufacture to bespoke customer requirements.
UNS S31803, ASTM A182/A276, NORSOK M-630 MDS D47, W1.4501
A chemically resistant ferritic‑austenitic stainless steel offering superior seawater corrosion resistance and enhanced mechanical properties compared with standard austenitic grades.
Typical applications:
UNS S32760, ASTM A276/A479, NORSOK M-630 D57, W1.4507
A chemically resistant ferritic‑austenitic stainless steel offering superior seawater corrosion resistance and enhanced mechanical properties, outperforming F51 Duplex, 25% Cr UNS S32550 and 6% Mo UNS S31254 grades.
Typical applications:
UNS S17400, ASTM-A564 Grade 630 H1150D, NACE MR-0175/ISO15156, W1.4542
A martensitic stainless steel containing additions of Cu and Nb (Cb), enabling age hardening to achieve a wide range of yield strength and hardness combinations. It offers high strength, corrosion resistance, good impact properties and reliable weldability.
Typical applications:
UNS S41000, ASTM A276/A565, NACE MR-0175/ISO15156, W1.4006
A martensitic stainless steel capable of delivering good wear resistance alongside reliable corrosion resistance, making it suitable for a range of demanding applications.
Typical applications:
UNS S41500, NACE MR-0175/ISO15156, W1.4313
A martensitic stainless steel alloyed with nickel and molybdenum to deliver high strength and excellent sub‑zero impact properties. F6NM also provides a high level of corrosion resistance, supporting reliable performance in demanding environments.
Typical applications:
