316 Extruded Square Pipe

Where 316 Fits Between Standard Steel and Nickel Alloys

Unlike 304 square tubing, 316 holds up in marine and mildly acidic conditions thanks to its molybdenum addition. Compared to C276 or N06625 nickel alloy square pipes, 316 doesn't match their extreme corrosion resistance, but it costs a fraction of the price — often 60–70% less. For projects that need better-than-basic corrosion performance without the premium of a nickel alloy, the 316 extruded square pipe is the practical middle ground. We supply this product factory-direct from China, cutting out distributor markups entirely.

Manufacturing Advantages

Every 316 extruded square pipe leaves our mill through hot extrusion, achieving a yield rate above 95% with material loss under 5%. The result is a uniform cross-section with smooth interior and exterior surfaces — no weld lines, no weak points. Our signature unequal-wall profile is available: left, right, and top walls at 3.3 mm with a 13 mm bottom wall, ideal for directional load-bearing or liquid cooling channels. Standard equal-wall configurations are also on offer. Ji lai da can accommodate custom dimensions and surface finishes (pickled, polished, or as-extruded) on request.

Product Parameter

FAQ

Q1: How does the price of your 316 extruded square pipe compare to others?

A: We offer some of the most competitive pricing in the market. Because Ji lai da is a direct manufacturer — not a trading company — you get factory-direct prices with no middleman. Our 316 extruded square pipe typically costs 30–50% less than what European or American mills quote for equivalent specifications, and it's dramatically cheaper than nickel alloy alternatives. Send us your RFQ and we'll prove it.

Q2: What's the difference between your seamless square pipe and a welded one?

A: Our 316 extruded square pipe is formed in one continuous piece through hot extrusion — there are no weld seams, no heat-affected zones, and no risk of weld-line corrosion. Welded square tubes are bent and seam-welded from flat plate, which introduces weak points along the corners. If your application involves pressure, corrosive media, or long service life, seamless is the safer bet.

Q3: Can you produce the unequal-wall version (3.3 mm / 13 mm)?

A: Yes, that's one of our core capabilities. The unequal-wall 316 extruded square pipe — 3.3 mm on three sides and 13 mm on the bottom — is a specialty product that most mills can't produce. It's popular for AI data center liquid cooling systems where the thicker bottom wall handles structural load while the thinner sides optimize thermal transfer. We can also adjust the wall ratio to your requirements.

Q4: What surface finishes do you offer?

A: We supply the 316 extruded square pipe in three standard surface conditions: pickled (acid-washed for clean, uniform appearance), polished (mirror or brush finish for decorative or sanitary use), and as-extruded (cost-effective option for structural applications). Custom surface treatments are available upon request.

Q5: Is 316 suitable for seawater applications?

A: 316 handles splash-zone and intermittent seawater exposure well, thanks to its molybdenum content. For continuous full immersion in seawater or highly concentrated chloride environments, we'd recommend stepping up to C276 or N06625. That said, for most near-shore and coastal installations, the 316 extruded square pipe delivers reliable performance at a much lower cost — and we're happy to discuss your specific conditions.