304 Extruded Square Pipe

From Factory Floors to Kitchen Sinks

Few materials cross the industrial–civilian boundary as smoothly as 304. On the industrial side, the 304 extruded square pipe serves as structural framing for conveyor systems, equipment enclosures, handrails, and chemical storage racks. On the civilian side, it shows up in architectural facades, kitchen furniture frames, shower enclosures, and decorative railings. The seamless extruded form means it handles pressure-bearing duties in light process piping just as well as it handles aesthetic demands in visible installations. Ji lai da supplies both standard equal-wall profiles and our signature unequal-wall configuration — left, right, and top walls at 3.3 mm with a 13 mm bottom — for applications that need directional strength or integrated cooling channels.

Why Buy 304 Square Pipe from Us

Ji lai da extrudes every 304 square pipe from solid billet, achieving a yield rate above 95% with material waste below 5%. The result is a uniform cross section with smooth interior and exterior surfaces — no weld lines, no corner thinning, no secondary processing needed. As a China manufacturer selling factory-direct, we eliminate distributor layers entirely, so the price you pay is the mill price. Whether you need a trial order of a few pieces or a container-load bulk shipment with MTC and EN 10204 documentation, we handle it. FOB, CIF, and DDP delivery terms available worldwide.

Product Parameter

FAQ

Q1: How much cheaper is 304 compared to 316 or nickel alloys?

A: Significantly. 304 stainless steel typically costs 20–30% less than 316 and 70–80% less than nickel-based alloys like C276 or N06625. If your environment doesn't involve chlorides or strong acids, you're paying for capability you don't need by going with a higher grade. The 304 extruded square pipe gives you seamless structural performance at the most economical price point in the stainless steel range.

Q2: Can I use 304 square pipe outdoors?

A: Yes, in most atmospheric conditions 304 performs well — that's why it's the default choice for outdoor railings, building facades, and street furniture. In coastal or high-chloride environments, surface tea-staining can appear over time; if that's a concern, 316 is the safer pick. For the vast majority of inland and covered outdoor uses, 304 is more than adequate.

Q3: What's the unequal-wall version for?

A: Our unequal-wall 304 extruded square pipe has three sides at 3.3 mm and the bottom at 13 mm. The thicker bottom handles structural loads or mounting hardware, while the thinner sides reduce weight and improve thermal transfer. It's especially popular for AI data center liquid cooling conduits and equipment frames where one face bears more stress than the others. We can also customize the wall ratio to your specs.

Q4: Is seamless really necessary for a square pipe?

A: Depends on your application. If the pipe is purely decorative or carries no pressure, a welded square tube may suffice. But if you need pressure containment, corrosion reliability, or long-term structural integrity — especially at corners where welded tubes are weakest — seamless is the way to go. Our 304 extruded square pipe is formed in one piece, so there are no seam failures waiting to happen.

Q5: What's the minimum order quantity?

A: Because 304 is our highest-volume grade, we're very flexible on MOQ. Small trial orders are welcome — we understand you may want to test dimensions and surface quality before committing to a bulk order. For standard sizes, lead times are short. For custom profiles or unequal-wall configurations, we'll provide a timeline with your quotation. Reach out with your RFQ and we'll work something out.