C276 Extruded Square Pipe

C276 extruded square pipe from Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. eliminates that contradiction entirely — no seams, no welds, no heat-affected zones, no filler-metal dilution, and no residual tensile stress at a seam root. The pipe is formed by hot extrusion: a heated C276 billet pressed through a square die in a single stroke, producing a seamless hollow with uniform grain flow across all four walls and corners, so the microstructure at the corner radius matches the mid-wall. The result is clean internal corners that do not trap deposits, no need for radiographic or ultrasonic inspection of nonexistent seams, and as-extruded dimensional accuracy without post-weld straightening. Ji lai da is one of the few China manufacturers capable of extruding C276 into square profiles — the high deformation resistance and rapid die wear deter most mills, but dedicated tooling and process development make it available here. C276 extruded square pipe from Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. ships with EN 10204 3.1 MTC, ISO 9001 certification, and factory-direct pricing under FOB, CIF, or DDP terms. Custom cross-sections with equal or unequal wall, lengths to 6 000 mm, and surface options including pickled and polished are all supported. If you have been told seamless C276 square section is unavailable, send your RFQ — it is. Procurement teams sourcing direct from the China manufacturer receive a written quote and lead time the same working day.

Hot extrusion makes this possible.

A heated C276 billet is pressed through a square die in a single stroke, producing a seamless hollow with uniform grain flow following all four walls and corners. The microstructure at the corner radius is the same as at the mid-wall — same density, composition, and corrosion resistance. No heat-affected zone because there was no welding; no filler dilution because no filler was used; no residual tensile stress because no seam exists. For pressure-containing square sections in acid service, one-piece integrity is a design requirement, not a luxury.

Welded C276 square tube has problems beyond corrosion.

The inner corner weld bead disrupts flow and traps deposits that accelerate crevice attack. Weld inspection — radiography or ultrasonic — adds cost and still cannot guarantee absence of micro-fissures in nickel alloy welds. Distortion during welding makes it hard to hold dimensional tolerance. Extruded pipe avoids all of these: clean internal corners, no inspection of nonexistent seams, and as-extruded accuracy without post-weld straightening. If the application justifies C276, it justifies seamless construction.

Ji lai da is one of the few China manufacturers capable of extruding C276 into square profiles. C276's high deformation resistance and rapid square-die wear deter most mills — we invested in the tooling and process development because our core business is nickel alloy, not stainless commodity. C276 extruded square pipe from Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. ships with EN 10204 3.1 MTC, ISO 9001, and factory-direct pricing. If you have been told seamless C276 square section is unavailable, contact us for a quotation — it is.

FAQ

Q1: Why not just use welded C276 square tube?

C276 is specified for the most aggressive reducing-acid environments — wet chlorine, concentrated HCl, sulfuric acid at temperature. Welds are the weakest point and fail first in these conditions. C276 extruded square pipe has no welds, so there is no weak point. If the application justifies C276, it justifies seamless.

Q2: What about the corner radius — is it sharp?

A natural corner radius from the extrusion die — a few millimeters depending on section size. Not a defect but a structural advantage: it distributes stress and eliminates the crevice that a sharp welded corner creates.

Q3: Can you do unequal-wall C276 square profiles?

Yes. Same capability as our stainless and 625 square pipes — thick bottom, thin sides, or any combination. Custom die, custom quote.

Q4: How is your pricing for C276 square pipe?

Better than you'd expect for a product this rare. We're a China manufacturer with our own nickel-alloy extrusion line — no outsourcing, no trading margin. High material yield and dedicated C276 tooling keep costs down. Contact Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. for a quotation and compare.

Q5: Is this product truly seamless — no weld at all?

Absolutely none. One billet pressed through a shaped die — four walls, four corners, zero seams. The same process as C276 round pipe, just with a square die.