If you're looking for Hastelloy C276 seamless tubing with a large outer diameter and thick walls-for example, a 219 mm outer diameter, 22 mm wall thickness, and a 1500 mm length-many chemical and high-temperature process engineers face the same question: Is this specification technically feasible?
This article will explore the manufacturing feasibility, minimum producible wall thickness, manufacturing methods, minimum order quantities, and key advantages of Hastelloy C276 seamless tubing. We'll also provide detailed technical data sheets and practical guidelines for industrial buyers.
What Is Hastelloy C276 pipe (JIS NW 0276)?
Hastelloy C276, designated as UNS N10276 / JIS NW 0276, is a nickel-molybdenum-chromium alloy with excellent corrosion resistance to strong oxidizing and reducing media. It performs well in chloride-containing environments, acidic solutions, and high-temperature oxidizing atmospheres.
Typical applications include:
Chemical process equipment (reactors, scrubbers, heat exchangers)
Flue gas desulfurization systems
Pulp and paper bleaching plants
Marine exhaust systems
Pollution control devices
Feasibility of Manufacturing 219mm × 22mm Hastelloy C276 Seamless Pipe
| Specification | Feasibility Status | Remarks |
|---|---|---|
| Outer Diameter: 219 mm | ✅ Feasible | Common large size for pressure vessels |
| Wall Thickness: 22 mm | ⚠️ Difficult but possible | Requires hot extrusion process |
| Length: 1500 mm | ✅ Feasible | Short length reduces risk of surface cracking |
Explanation:
A 22 mm wall thickness on a 219 mm OD Hastelloy C276 seamless pipe is technically possible but challenging due to the alloy's high strength and work-hardening tendency. Standard hot extrusion or piercing extrusion is recommended instead of cold drawing.
If the extrusion equipment is limited, a wall thickness between 16 mm and 20 mm is more practical for consistent quality and lower internal stress.
Recommended Manufacturing Methods
| Process | Description | Advantages | Applicable Range |
|---|---|---|---|
| Hot Extrusion (Pressing) | Billets heated to 1150–1180°C, extruded through dies | Ideal for thick-wall, large-diameter seamless pipes | OD 60–350 mm, WT up to 30 mm |
| Cold Drawing / Pilgering | Fine finishing after extrusion | Improves dimensional accuracy and surface finish | For WT < 10 mm |
| Cold Pilger + Annealing | Repeated reduction + solution annealing | Better microstructure uniformity | Used for special sizes and short lengths |
For your requested specification (219×22×1500mm), hot extrusion + solution annealing is the most suitable method.
Hastelloy C276 pipe (JIS NW 0276) Datasheet
| Item | Standard / Value |
|---|---|
| Material Grade | Hastelloy C276 / UNS N10276 / JIS NW0276 |
| Manufacturing Standard | ASTM B622 / ASME SB622 |
| Manufacturing Process | Hot Extrusion + Solution Annealing |
| Outer Diameter Range | 6 – 273 mm |
| Wall Thickness Range | 1 – 25 mm (22 mm available upon request) |
| Length | 1000 – 6000 mm (custom cut available) |
| Surface Finish | Pickled / Bright Annealed / Polished |
| Testing | 100% PMI, Eddy Current, Ultrasonic & Hydro Test |
| Certification | ISO 9001, EN 10204 3.1, SGS / BV |
Packaging and Delivery
Each pipe is capped at both ends, wrapped with VCI paper, and packed in fumigation-free wooden cases.
Export seaworthy packaging ensures safety during long-distance transport.
Delivery within 45–60 days, depending on batch size and process schedule.
Mail:es@gescosteel.com
