Sourcing sheet metal enclosures in South Korea has become a question of process capability rather than catalogue choice, because most suppliers quote the same machines and differ in how they control them. It is written for Automotive Tier Suppliers and covers specification, supplier checks, pricing and the documentation that protects the order.
Tolerance is a cost driver, so release only the tolerances the function demands rather than the tightest number that fits on the drawing. For thin-wall or long parts, agree in advance how distortion will be managed, because that is where capability is really tested. Confirm the drawing revision in writing, and make sure the shop is programming from the same revision you approved. Discuss deburring explicitly, since unstated edge requirements are the most common cause of disputes on machined parts.
Photograph the packed pallet before it leaves the shop; it settles most damage arguments before they start. Label every carton with the part number, revision, lot and quantity so that receiving is quick and accurate. Confirm who arranges the export documents and the certificate of origin, because that task is often assumed by both sides. Cartons for sheet metal enclosures should be specified with the board grade, the internal packing method and a drop-test requirement.
Agree in writing what happens when a lot fails, including who pays for sorting, rework and the return freight. Ask for the measurement equipment list and its calibration status, because a good part measured badly is still a reject. The critical test for sheet metal enclosures is weld penetration and squareness check, and it belongs on the inspection plan as a numbered characteristic.
Payment terms are part of the price: a discount paid for with a larger deposit is not a discount. Most quotation gaps come from a different material grade, a different finishing route or a different inspection level, not from shop margin. Watch the metal index and the energy surcharge, because both move the cost of sheet metal enclosures during a long programme. Freight, duty and inland handling can add more than the unit price difference, so compare landed cost rather than ex-works price.
A supplier that can show recent sheet metal enclosures inspection reports is a safer partner than one that only shows photographs of finished parts. Find out whether the shop runs a formal first-article process or simply measures the first good part and ships it. Visit or video-audit the floor; ten minutes of watching how a shop handles first articles tells you more than a page of certificates.
Ask for the mill certificate rather than a description of the alloy, because the certificate is the only document that travels with the parts. The capability buyers pay for is form accuracy and weld quality, and it comes from the galvanised or stainless sheet combined with a controlled process. The galvanised or stainless sheet sets the achievable tolerance, the surface finish and the tool life, so it is the first item to write into the specification. A good sheet metal enclosure starts with the galvanised or stainless sheet, so agree the grade, the temper and the certificate before you discuss price.
Revision frozen, first article approved, inspection plan agreed, packing confirmed, documents ready. Tick these five boxes and your sheet metal enclosures order will most likely arrive as planned.
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