Mitchell Stainless is a reputable manufacturer and supplier of Stainless Steel 439 Pipes based in Hamilton, New Zealand. They provide dependable solutions for industries that demand durability, heat resistance, and excellent corrosion performance. With a strong commitment to quality, precision manufacturing, and customer satisfaction, Mitchell Stainless creates pipes that adhere to international standards and cater to a variety of application needs. Stainless Steel 439, a ferritic stainless steel, is celebrated for its outstanding resistance to oxidation and stress corrosion cracking. With a team of technical experts and state-of-the-art facilities, Mitchell Stainless guarantees consistent product performance, timely delivery, and tailored piping solutions for industrial, commercial, and engineering projects throughout New Zealand and beyond.
Stainless Steel 439 Pipes are mainly made up of iron, chromium (around 17–19%), and stabilized elements like titanium, which improve weldability and help prevent carbide precipitation. The low carbon content enhances corrosion resistance and structural stability at high temperatures. In terms of mechanical properties, SS 439 boasts good tensile strength, moderate yield strength, and excellent resistance to thermal fatigue. Its ferritic structure offers superior resistance to stress corrosion cracking compared to austenitic grades, making it ideal for high-temperature and mildly corrosive environments that require long-lasting reliability.
| Specifications | ASTM A/ASME SA268/A731 CL |
| Dimensions | ASTM, ASME and API |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Wall Thickness | Sch 5s, 10s, 40s, 80s, 160, XXS |
| Size – Seamless 439 Pipes | 1/2″NB – 24″NB |
| ERW 439 Pipes | 1/2″ NB – 24″ NB |
| EFW 439 Pipes | 6″ NB – 100″ NB |
| Form | Round, Square, Rectangular, Hydraulic Etc |
| Types | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| End | Plain End, Beveled End, Treaded |
| Length | Single Random, Double Random & Cut Length. (Custom Sizes Available as per customers requirement) |
| Grade | C | Mn | Si | P | S | Cr | MO | Ni | CU | |
| 439 | Min | – | – | – | – | – | 12.0 | – | – | – |
| max | 0.15 | 1.00 | 1.00 | 0.04 | 0.03 | 14.0 | – | – | – | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| 439 | 95,000 | 50,000 | 25 | – | 175 |
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We ensures the highest quality standards for Stainless Steel 439 Pipes through rigorous testing and certification processes. Every pipe goes through extensive tests, including chemical analysis, mechanical testing, and dimensional inspection. In this regard, we provide suitable certificates like Mill Test Certificate (MTC) and ISO certifications to make sure every product stands as a reliable brand and follows the market norms.
Stainless Steel 439 Square Pipes offer excellent corrosion resistance and are used in applications requiring a robust structure. They typically come in sizes ranging from 1/2″ to 8″, with wall thicknesses varying based on the application.
These pipes offer superior corrosion resistance and are used in high-temperature environments. They are available in sizes from 1/4″ to 12″ in diameter, with wall thicknesses ranging from 0.5mm to 20mm.
Providing good corrosion resistance, these pipes are manufactured using the electric resistance welding process. They are available in sizes from 1″ to 12″ in diameter, with various wall thicknesses for different pressure ratings.
These pipes, known for their corrosion resistance, are produced by longitudinal submerged arc welding. Sizes typically range from 6″ to 48″ in diameter, with wall thicknesses from 5mm to 25mm.
Offering excellent corrosion resistance, these pipes are used in various industries. They come in sizes from 1/4″ to 12″ in diameter, with wall thicknesses ranging from 1mm to 15mm.
These pipes exhibit good corrosion resistance and are made by welding flat plates. They are available from 1″ to 24″ in diameter, with wall thicknesses tailored to specific pressure and temperature requirements.
The Stainless Steel 439 Pipes produced by Mitchell Stainless find extensive use in applications where heat resistance and oxidation protection are essential. They are commonly found in automotive exhaust systems, heat exchangers, boilers, condensers, and industrial furnaces. Additionally, these pipes are well-suited for petrochemical processing, power generation, and structural components that are exposed to high temperatures. Thanks to their excellent weldability and corrosion resistance, SS 439 pipes are a preferred choice in various industries, ensuring that they meet the demands of challenging environments.







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