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Forms and finishes
Request stainless steel square tube pricing by side size, wall thickness, length, grade and surface finish.
Request a quoteTechnical reference
| Field | Order reference |
|---|---|
| Standard | A554 welded mechanical tubing when specified |
| Product or route | Equal outside sides with formed corners |
| Critical dimensions and fit | State the corner radius, visible faces and insert clearance |
| Supply enquiry | Confirm sizes, lengths, route, documentation and lead time for your order |
Drawing examples in millimetres. Enter the corner radius and the tolerances separately. Corner geometry affects clearance and weight.
| Outside side A (mm) | Outside side B (mm) | Nominal wall (mm) | Drawing checks |
|---|---|---|---|
| 25 | 25 | 1.5 | Corner radius, seam and cut length |
| 40 | 40 | 2 | Corner radius, seam and cut length |
| 50 | 50 | 3 | Corner radius, seam and cut length |
Use the drawing or approved assembly design for fit and service. Verify permitted loads or flow requirements and the acceptance criteria for the finished part.
The grade on the purchase line controls chemistry. Specify the grade with the finished product standard or drawing.
| Check | What to match |
|---|---|
| Grade and specification | TP or UNS on the quotation and material report |
| Heat analysis | Full limits and any stabilising or alloy additions under the ordered edition |
Reference ASTM steel standards
Use the ordered grade, delivery condition and product standard to review the actual tensile, yield, elongation or hardness results required by the order.
| Check | What to verify |
|---|---|
| Condition | Heat treatment or cold-work condition stated for the offered form |
| Acceptance | Project-specified dimensions and relevant test records |
Reference ASTM steel standards
Check outside sides, wall, corner shape and seam clearance against the drawing.
| When | What to check |
|---|---|
| Before ordering | Document the required test method, edition and any witness points |
| At delivery | Match the material report and heat or lot identification to the shipment |
Rectangular sections introduce a separate orientation requirement.
For the enquiry, state the corner radius, visible faces and insert clearance.
A554 welded mechanical tubing when specified · 25 × 25 × 1.5 mm. Add quantity, lengths, delivery city and the required reports.
Ordering guidance
State the outside side dimension, wall thickness and length. Include the required corner geometry, straightness or dimensional tolerance if it matters for a bracket, frame or assembly.
For a visible installation, specify the intended finish and which faces must meet it. Do not assume a polished finish, a particular corner radius or a structural application from the words square tube alone.
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Buyer’s guide
Square tube is ordered by outside side × outside side × wall. If a cap, bracket or insert must fit, add the required corner radius and actual clearance. The inside span cannot be treated as a perfect square reduced by twice the wall because formed corners and an inside seam can affect fit. Provide a drawing for nested sections or a press-fit insert.
For a display frame or guard, identify the show faces, finish and brushing direction. If the shop wants the seam on a concealed face, state the acceptable seam position and ask the supplier to confirm it before cutting. Tell the fabricator whether protective film, separated bundles or appearance matching across a batch is needed.
ASTM A554 addresses welded mechanical tubing and includes square sections. If the section is load-bearing, the drawing or engineer should give the required structural specification and properties. Ask for separate quotations if you need both welded mechanical sections and engineering-approved structural members.
Send a line such as 40 × 40 × 2 mm, six cut lengths per drawing, with brushed show faces and an insert detail. Identify the grade and specification separately and mark whether cut tolerance is critical.
Confirm the internal corner geometry, seam and tolerance. The same outside size can leave different clearance inside.
Technical references ASTM A554 mechanical tubing scope · ASTM steel standards directory
Prepare your enquiry
| Item | What to send |
|---|---|
| Product details | Side × side × wall · length · grade · finish · tolerance |
| Delivery | Quantity with units, delivery city and required date if known |
| Acceptance | Required certificates and inspection scope; attach the drawing revision where applicable |
Use the actual side and wall dimensions on the drawing rather than a nominal round pipe schedule.
Project enquiries
Send your dimensions, quantities and delivery city. Include any inspection or material certificate requirements so they can be quoted against the same line items.
Request a quote → Call +91 99204 92715