How we source and update

FOB Shanghai prices for 6063 and 6061 are computed daily from the COMEX aluminium futures price (Yahoo Finance symbol ALI=F) plus a fixed processing premium for each alloy. They are not a private mill survey and not a median of mill quotes.

The futures series is COMEX aluminium futures (Yahoo Finance symbol ALI=F), in USD/t. The SHFE continuous contract is a Sina Finance quote after the 15:00 CST close. Changjiang A00 spot comes from ccmn.cn. Only 6063 and 6061 FOB values are computed, each day, as that futures price plus a fixed premium.

This methodology is intentionally fully reproducible from public sources; the formula is in scripts/scraper/sources/fob_composite.py and changes are versioned by git history. Earlier copy implied a private "13-mill panel" — that was inaccurate language and was corrected in the 2026-04-22 content audit.

Landed cost = FOB price + ocean freight + insurance + destination port fees + import duty + anti-dumping + VAT + inland trucking. Each line is itemized in the calculator output so you can see what's driving the total.

• FOB — 6063 or 6061, computed daily from the COMEX aluminium futures price plus a fixed processing premium (see §2 above), or your own input.
• Ocean freight — Freightos Baltic Index (FBX) origin→destination route, refreshed daily.
• Insurance — 0.3% of CIF default (institutional buyer rate); user-overridable.
• Duty — destination MFN rate from our tariffs table (HS chapter 76 lines), refreshed monthly from official tariff schedules.
• Anti-dumping (US/EU/CA) — order-specific ceiling rates from access.trade.gov / EUR-Lex; per-exporter rates may differ.
• VAT / GST — destination country rate applied on the duty-paid CIF base.
• Port fees + trucking — destination-specific defaults from forwarder quotes (Q1 2026 sample); user-overridable.

Currency conversions use the FX sources listed in §1. The calculator is a planning tool — actual landed cost depends on your forwarder, broker, and the specific HS line. Always confirm with a licensed customs broker before committing to a shipment.

统一后步骤

Mill profiles follow the five steps below. The field-presence sheet uses these labels: 身份, 地址语义, 成立年, 证书编号+有效期, 规模或类型. 地址/实体 is the 地址语义 row. 年限 is 成立年. 规模 is 规模或类型. 证书 is 证书编号+有效期.

1. 1 身份：公开登记可核；不对公电话/邮箱
2. 2 地址/实体：冲突并列，禁静默覆盖
3. 3 年限/规模：有出处才写；缺则隐藏
4. 4 证书：编号+有效期；无则不上架、禁 name-only 绿标
5. 5 核对工具：可指 verify-factory / field-presence / hard-facts；不承诺可靠分/排名

禁做：电话邮箱、Verified、可靠分、排行榜、引用率%、编造出处

verify-factory · field-presence · hard-facts

We fix errors. Publicly. With a note.

• Factual corrections (price, capacity, registration status) are published inline on the affected page with a visible note and the date we fixed it. An archived corrections index is on the roadmap.
• Editorial corrections (mischaracterization, unclear attribution) trigger an update to the article with a visible correction note at top.
• Take-down requests for defamation or false-fact claims are evaluated within 48 hours.
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