Introduction
Um RFQ que so diz bobina SPCC laminada a frio, 0.8 x 1250, qualidade comercial nao congela uma bobina compravel. Uma usina cotiza SPCC-SD com oleo leve. Outra envia tira full-hard que trinca nos cantos do tubo. Uma terceira coloca DC01 na proforma e SPCC na etiqueta.
Este tear-down ajuda compradores de fabricas de moveis de aco e OEM tubo-chapa que compram bobina SPCC laminada a frio. Nao substitui a edicao pedida de JIS G 3141. Cruze com DC01 / ASTM A1008 via SPCC vs DC01 vs ASTM A1008. HR vs CR: bobina laminada a quente vs a frio.
Os campos da linha de moveis que tornam tres cotacoes SPCC incomparaveis
Quick technical summary:
Para bobina SPCC de moveis, congele grau JIS G 3141, temper (A / S / duro), espessura BMT com classe de tolerancia, largura slit e borda, superficie para powder coat ou tinta, oleo, embalagem anti-risco e linhas EN 10204 3.1 antes de ranquear FOB.
| Missing RFQ field | What the mill fills | Why furniture quotes cannot be ranked |
|---|---|---|
| Temper omitted | Stock S, A, or hard 8/4/2/1 | Soft panel and hard strip share one price |
| Surface / oil omitted | Heavy oil, light oil, or dry | Powder adhesion and rust risk diverge |
| BMT vs nominal thickness | Nominal only, no class A/B | Panel flatness and weld gap drift |
| Slit width open | Parent coil 1000-1500 mm | Unslit parent cannot feed tube mill |
| Packing left as export standard | Soft wrap without edge guards | Visible face scrap from coil rub |
| MTC lines not named | Heat chemistry only | Temper and size proof missing at PSI |
Temper, recozido e oleo: o que cada simbolo congela
Sob JIS G 3141, qualidade comercial e SPCC. Temper e simbolo separado. Acabamento padrao: D (fosco) ou B (brilhante). Exemplo: SPCC-SD. Fornecimento padrao oleado salvo unoiling.
| Temper symbol | Meaning on PO | Furniture-line implication |
|---|---|---|
| A | As-annealed | Soft, formable; coil break / edge wave possible |
| S | Standard temper (skin-passed) | Common default; better panel flatness |
| 8 / 4 / 2 / 1 | 1/8 to full hard | Higher hardness; bend/tube window shrinks |
| SPCCT | SPCC with tensile guarantee | When drawing needs tensile/elongation gate |
Limites quimicos comerciais citados para SPCC (confirme edicao JIS G 3141). Nao upgrade silencioso para SPCD / SPCE. Veja guia SPCC vs DC01.
| Element | Typical SPCC commercial max | Buyer note |
|---|---|---|
| C | 0.15 max | Weldability / formability |
| Mn | 0.60 max (some extracts up to 1.00) | Confirm edition |
| P | 0.100 max | Impurity gate |
| S | 0.035 max | Impurity gate |
Espessura BMT, classe de tolerancia e largura slit para tubo e estrutura
Plantas misturam bobina larga para gabinetes e bobina slit para tubo/frames. Exemplo comercial: nao basta escrever ±0.02 mm sem classe. Prefira espessura pedida + classe JIS G 3141 A/B. Alinhe com checklist tolerancia.
| Dimension field | Freeze on RFQ | Bid failure if open |
|---|---|---|
| BMT / nominal thickness | mm + JIS G 3141 class A or B | One mill class A; another wider commercial band |
| Parent coil width | 1000 / 1219 / 1250 / 1500 mm + edge | Nesting and scrap diverge |
| Slit width | Finished strip width, tol, burr, camber | Unslit parent cannot feed tube mill |
| Coil ID / max weight | Often 508 or 610 mm ID | Line stops when OD/weight exceeds decoiler |
| Flatness / camber | Sheet class; narrow-strip camber | Doors and long frames warp |
Classe de superficie para adesao de powder coat e tinta
A maioria dos moveis de aco recebe powder coat ou tinta apos conformacao e solda. Classe de superficie e entrada da pintura.
| Surface / prep field | Furniture intent | RFQ language |
|---|---|---|
| Finish D / B | Dull vs bright | SPCC-SD or SPCC-SB |
| Oil film | Rust protection vs degrease load | Light / heavy / dry |
| Critical face | Visible cabinet face | No rust, pits, deep scratches on outer wrap |
| Powder cleanliness | Phosphate / powder adhesion | Degrease compatibility note |
| Weld / grind zones | Tube frames | Separate from coil surface |
Checagem do comprador: oleo, riscos de embalagem e linhas MTC 3.1
Tres padroes de claim: (1) mismatch de oleo; (2) atrito sem edge guards; (3) MTC so quimica. Use pratica EN 10204 3.1 e template RFQ.
| Packing / QC item | Minimum furniture export ask |
|---|---|
| Anti-rust wrap | VCI paper + plastic film |
| Mechanical protection | Edge rings, side boards, steel straps |
| Stowage | Eye-to-sky or eye-to-wall; ~25-28 MT per 20GP |
| Marking | Grade, temper, size, heat/coil number |
| Documents | EN 10204 3.1 MTC + packing list by coil |
Bloco RFQ copiavel para bobina SPCC de moveis de aco
Cole e edite. Nao deixe parenteses abertos sem escolher.
Product: Cold-reduced carbon steel coil for steel furniture (panels / tube-frame strip)
Standard / grade: JIS G 3141 SPCC
Temper: S (or A / 8 / 4 / 2 / 1 - choose one). SPCCT tensile guarantee: Yes/No
Surface finish: SD (dull) or SB (bright)
Oiling: Light oiled / heavy oiled / dry (choose one); oil film compatible with powder-coat degrease
Thickness (BMT): __.__ mm; tolerance: JIS G 3141 class A or B (choose) + special +/-__ mm if needed
Parent coil width: ____ mm; edge: mill edge / slit edge
Slit program (if any): finished width ____ mm; width tol ____; max burr ____; camber ____; ID 508/610 mm
Coil weight: __-__ MT max per coil (decoiler limit)
Surface: critical face free of rust, pits, deep scratches; photo reject criteria attached
Packing: VCI + waterproof film + edge guards + steel straps; packing photos before container seal
Documents: EN 10204 3.1 MTC (standard, grade, temper if ordered, heat no., chemistry, dimensions); packing list by coil
Quantity: 1 x 20GP (25-28 MT) trial acceptable; total ____ MT
Delivery: FOB / CIF ____; target dispatch 7-15 days for standard sizes
Inspection: SGS / BV / buyer PSI welcome before loading
Application note: steel furniture panels / OEM tube-and-sheet (not structural plate; not galvanized RFQ)Conclusion
Compras SPCC para moveis falham por temper, oleo, BMT/slit e packing abertos—nao pela palavra SPCC. Congele simbolos JIS G 3141 e prova EN 10204 3.1 e rastreabilidade de heat.
Planejando um pedido ou precisa de verificacao tecnica?
Se voce compra bobina SPCC laminada a frio para paineis de moveis ou linhas OEM tubo-chapa:
- Cotação técnica rápida: pedidos-teste a partir de 1 x 20GP (25-28 MT) com despacho 7-15 dias. Envie via Formulário de cotação RFQ.
- Garantia de qualidade: cada pedido com EN 10204 3.1 Mill Test Certificates. Inspecoes SGS, BV, TUV bem-vindas.
- Consultas urgentes: WhatsApp +86 151 5311 2221.
