UNS N10276 Extruded Pipe

What is a UNS N10276 Extruded Pipe?

UNS N10276 extruded pipe is the standardized designation for seamless nickel-based alloy tubing manufactured from Alloy C-276 (Hastelloy C-276). The UNS (Unified Numbering System) designation defines the chemical composition and performance requirements of this corrosion-resistant alloy, ensuring consistent material properties for demanding industrial applications.

We produce UNS N10276 extruded pipes using a hot extrusion process, where a heated alloy billet is pressed through a specially designed die to form a seamless tubular structure in a single operation.

Unlike welded nickel alloy pipes, hot-extruded UNS N10276 pipes contain no longitudinal weld seam, eliminating potential weak points caused by welding heat input, residual stress, or weld corrosion. The result is a homogeneous pipe structure with consistent mechanical properties from the inner surface to the outer wall.

Key Features

1. Seamless Hot Extrusion Manufacturing

Ji lai da UNS N10276 extruded pipes are produced through hot extrusion rather than welded fabrication.

The extrusion process forms the pipe directly from a solid alloy billet, creating:

● No longitudinal weld seam
● No weld heat-affected zone
● More uniform metallurgical structure
● Improved pressure resistance
● Higher reliability in corrosive environments

This makes seamless extrusion especially valuable when a welded joint could become the first failure point in aggressive chemical service.

2. Outstanding Corrosion Resistance

Alloy C-276 is recognized for its exceptional resistance to both reducing and oxidizing corrosive media.

The high molybdenum content provides strong protection against reducing acids such as hydrochloric acid, while chromium and tungsten improve resistance against localized corrosion, including:

● Pitting corrosion
● Crevice corrosion
● Stress corrosion cracking

UNS N10276 extruded pipe is suitable for environments where stainless steel and conventional nickel alloys may experience premature failure.

3. Stable Performance in Extreme Industrial Conditions

UNS N10276 pipes are designed for harsh operating environments involving:

● Concentrated acids
● Wet chlorine gas
● Hydrogen sulfide (H₂S)
● High chloride concentrations
● Chemical process fluids

The alloy maintains excellent corrosion resistance even under changing chemical conditions where both reducing and oxidizing media may exist.

What the UNS Number Actually Guarantees?

The Unified Numbering System strips away brand names and trade claims. N10276 tells a metallurgist that this alloy carries enough molybdenum to resist concentrated hydrochloric acid at 70 °C, enough tungsten to stabilize the matrix against pitting in wet chlorine gas, and low enough carbon (≤ 0.01%) to avoid sensitization during welding. No other commercial nickel alloy matches this balance for reducing-acid service. Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. produces UNS N10276 extruded pipe in OD 6–89 mm with wall thickness 3–9 mm, hot-extruded in a single pass that eliminates longitudinal weld seams entirely.

Key Specification Parameters

Extrusion Over Welded Fabrication

C-276 is weldable — but the weld seam is always the first candidate for intergranular attack, especially when the service environment cycles between oxidizing and reducing states. Hot extrusion bypasses the problem entirely: the bore forms under die pressure, not arc heat. The pipe comes out seamless, with a homogeneous grain structure from inner wall to outer surface. Yield rate exceeds 95% and material waste stays below 5%, which matters when the raw alloy costs 15–20 times the price of stainless steel.

Where UNS N10276 Pipe Earns Its Keep

Scrubber outlets carrying wet SO₂ and HCl. Pharmaceutical reactor jackets where a single weld pit would scrap an entire batch. Offshore produced-water piping saturated with H₂S and chlorides at 80 °C. Chlor-alkali cell headers handling wet chlorine gas — one of the few environments where UNS N10276 extruded pipe is not just preferred but mandatory. Each length ships with MTC to EN 10204 3.1, and Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. supports factory-direct supply under FOB, CIF, or DDP terms from China.

Frequently Asked Questions

Q: Is UNS N10276 the same as Alloy C-276?

Yes. UNS N10276 is the formal designation; "Alloy C-276" and "Hastelloy C-276" are trade names for the same chemistry.

Q: What temperatures can this pipe handle?

N10276 maintains useful mechanical properties up to approximately 1000 °C in oxidizing atmospheres and performs well in reducing environments up to about 400 °C.

Q: Can you produce custom sizes outside the standard range?

Standard OD range is 6–89 mm, but custom dimensions can be discussed for project-specific requirements. Contact us with your RFQ.

Q: Does this pipe comply with NACE MR0175?

Yes. UNS N10276 is listed in NACE MR0175 / ISO 15156 for sour service in oil and gas production.

Q: What is the typical delivery time?

Lead time is 30–45 days from order confirmation depending on size and quantity. Factory-direct pricing available within 24 hours of RFQ.

Q: How does C-276 compare to C-22 for oxidizing acid service?

C-22 (UNS N06022) outperforms C-276 in strongly oxidizing acids. C-276 is stronger in pure reducing acids. For mixed or cycling environments, both are excellent — the choice depends on which side of the redox spectrum dominates.