Aunov Tech manufactures the Custom 316 grade OD 4mm stainless steel one end closed tube with flange in stainless steel on a single production floor. In duty, the deep drawn tube carries fluid or motion through a closed drawn wall. Drawing, cutting and measurement sit on one floor, so the approved sample defines every later batch under one roof.
Product overview
What defines this stainless steel tube is, the formed envelope, flatness and hole location, each measured at first article and gauged on production batches.
Tooling and finishing for this stainless steel tube run under one roof, so the route from print to sample stays short, and the same die can be re-cut from the original data.
From coil to finished part
This is how the stainless steel tube is built: The drawn envelope is produced in stages with anneals between them; after drawing, critical faces are machined and the part is degreased and gauged.
Production batches of the -plated closed cup are gauged back to the signed first article, not to a memory of it. That record is what every -plated closed cup reorder is built on, so nothing changes silently between shipments.
Materials and finishing
Working stock covers SPCC / DC01 carbon steel, 304 / 316 stainless, aluminium, brass, copper and bronze and this stainless steel tube runs in 304 / 316 stainless steel.
The finish is chosen for the duty it will see: polishing, plating in zinc, nickel or chrome, anodising, powder coating, electrophoresis and passivation. The agreed finish for this stainless steel tube travels with the part number on every reorder.
Each shipment is verified against the master sample, with mill certificates filed per heat.
Quality control
The plant is ISO 9001 certified: certificates verify each incoming batch of material, first articles are measured on a CMM, and run inspections follow an agreed sampling plan. First article of the -plated closed cup carries wall thickness data. Tests for torque, leakage or pressure can be arranged when the service demands them, and results travel with the batch paperwork.
Applications
The stainless steel tube sits in industrial equipment and general assembly work for customers who own the drawing and the tooling.
A single design of this stainless steel tube is often reused across a product family, so the specification is set by the toughest of them, without a second tooling round.
Customization and options
Where designs usually differ
What customers usually vary on this stainless steel tube: coating, wall bands, flange profiles, threads and the degree of closure on the ends, and whether the programme starts as a sample or a full release.
The quotation for this stainless steel tube is explicit about what the die already covers, so you can see which options are free and which need new tooling. The -plated closed cup drawing revision, once signed, governs all later batches.
Specifications
| Item | Custom 316 grade OD 4mm stainless steel one end closed tube with flange |
|---|---|
| Brand | AUNOV |
| Designing | Your drawing sets the part – samples are reverse-measured into a controlled drawing; changes are priced before they are made. |
| Tooling | Our toolroom covers die design, wire-cut EDM and maintenance, so the die charge appears as its own quotation line, and the die remains dedicated to your part. |
| Samples | Samples are issued for approval before the run, and production starts only after written sign-off. |
| Materials | 304 / 316L stainless steel in 4 mm sheet for drawn and formed features, or bar stock for machined ones; mill certificate per heat on request. |
| Surface finish | Zinc, nickel or chrome plating, anodising, passivation or e-coat; masking and laser marking available where needed. |
| Processing | Precision tube drawing, cut to length and turned to the print; in-process checks sit between stages, not only at the end. |
| Equipment | Tube drawing lines with annealing and finish-turning cells, with in-house toolmaking to keep dies and fixtures maintained. |
| Tolerance | +/-0.05 mm on bore, wall thickness band confirmed at first article; finer bands confirmed from capability data before quoting. |
| Delivery terms | FOB, CIF or DDP per Incoterms 2020, T/T or L/C, with D/P accepted on repeat business; each volume tier carries its own quoted price. |
Packaging and delivery
The finish on this stainless steel tube dictates how it is packed: interleaves, polybags or formed trays are selected according to the coating, in sealed cartons on export pallets, with documents issued to your instructions.
