Introduction
RFQ yang hanya menulis kumparan SPCC canai dingin, 0.8 x 1250, commercial quality belum membekukan kumparan yang bisa dibeli. Satu pabrik menawarkan SPCC-SD minyak ringan. Lain mengirim strip full-hard yang retak di sudut tube. Ketiga menulis DC01 di proforma dan SPCC di tag.
Tear-down ini untuk pabrik furnitur baja dan OEM tube-sheet yang membeli kumparan SPCC canai dingin. Ini panduan pengadaan, bukan pengganti edisi JIS G 3141 yang dipesan. Untuk silang DC01 / ASTM A1008 lihat SPCC vs DC01 vs ASTM A1008. Konteks HR vs CR: kumparan hot-rolled vs cold-rolled.
Field lini furnitur yang membuat tiga penawaran SPCC tidak bisa dibandingkan
Quick technical summary:
Untuk kumparan SPCC furnitur, bekukan grade JIS G 3141, temper (A / S / hard), ketebalan BMT dengan kelas toleransi, lebar slit dan tepi, permukaan powder/cat, minyak, packing anti-gores, dan baris EN 10204 3.1 sebelum meranking harga 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, annealed, dan oiled: apa yang dibekukan setiap simbol
Di bawah JIS G 3141, kualitas komersial adalah SPCC. Temper adalah simbol terpisah. Finish standar: D (dull) atau B (bright). Contoh: SPCC-SD. Pasokan default oiled kecuali 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 |
Batas kimia komersial yang sering dikutip untuk SPCC (konfirmasi edisi JIS G 3141). Jangan upgrade diam-diam ke SPCD / SPCE. Lihat panduan 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 |
Ketebalan BMT, kelas toleransi, dan lebar slit untuk tube serta rangka
Pabrik mencampur kumparan lebar untuk kabinet dan kumparan slit untuk tube/frame. Contoh komersial: menulis ±0.02 mm tanpa kelas tidak cukup. Utamakan ketebalan pesan + kelas JIS G 3141 A/B. Selaraskan dengan checklist toleransi.
| 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 |
Kelas permukaan untuk adhesi powder coat dan cat
Sebagian besar furnitur baja di-powder atau dicat setelah forming dan welding. Kelas permukaan adalah input cat, bukan julukan pabrik.
| 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 |
Cek pembeli: film minyak, gores packing, dan baris MTC 3.1
Tiga pola klaim: (1) mismatch minyak; (2) gesekan tanpa edge guard; (3) MTC hanya kimia. Gunakan praktik EN 10204 3.1 dan 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 |
Blok RFQ siap tempel untuk kumparan SPCC furnitur baja
Tempel dan edit. Jangan biarkan opsi dalam tanda kurung tanpa memilih.
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
Pembelian SPCC furnitur gagal karena temper, minyak, BMT/slit, dan packing terbuka—bukan karena kata SPCC. Bekukan simbol JIS G 3141 dan bukti EN 10204 3.1.
Merencanakan order atau butuh verifikasi teknis?
Jika Anda mengadakan kumparan SPCC canai dingin untuk panel furnitur atau lini OEM tube-sheet:
- Penawaran teknis cepat: order uji dari 1 x 20GP (25-28 MT) dengan dispatch 7-15 hari. Kirim lewat Formulir RFQ.
- Jaminan mutu: setiap order dengan EN 10204 3.1 Mill Test Certificates. Inspeksi SGS, BV, TUV diterima.
- Pertanyaan mendesak: WhatsApp +86 151 5311 2221.
