Melt and Pour Certificate Steel 2026: The Document That Drives Section 232 Origin

Section 232 on steel has been at 50 percent ad valorem since June 4 2025. The rule of origin for Section 232 purposes is melt-and-pour: where the steel was melted and where the molten metal was first poured into solid form. The country of final processing or country of export is irrelevant. For mid-market steel importers, the melt-and-pour certificate has become the single most important document at customs entry.

This guide covers the regulatory basis, the certificate format, the multi-tier processing chain documentation, the worked examples for typical lanes, and the CBP enforcement posture.

The regulatory basis

Section 232 steel proclamation 9705 (March 8 2018) and successive amendments (most recently June 4 2025 raising the rate to 50 percent) determine origin for steel via the melt-and-pour rule:

• The country where the steel was melted (in a BOF, EAF, induction furnace, or other primary steelmaking process).
• The country where the molten steel was first cast into a solid form (slab, billet, bloom, ingot).

CBP regulations at 19 CFR 132 (country of origin) and the Section 232 administrative framework codify this for tariff purposes.

The key distinction: for general country-of-origin purposes under 19 USC 1304 (marking), the "substantial transformation" test is the default. For Section 232 specifically, melt-and-pour is a more restrictive overlay.

Worked example: Chinese-melt steel processed in Mexico

A Mexican steel processor imports Chinese-melt hot-rolled coil (HRC), cold-rolls it into thinner gauge, and exports the finished cold-rolled coil to the US as Mexican-origin under the commercial invoice.

Without melt-and-pour certificate: CBP applies Mexican origin per the commercial invoice. Section 232 at 0 percent (Mexican TRQ within quota). Risk of audit and reliquidation later if the substrate origin is questioned.

With melt-and-pour certificate showing Chinese melt: CBP applies Chinese origin for Section 232. 50 percent of full invoice value. Plus Section 122 at 10 percent (if Chinese 122 framework applies). Significant duty difference.

The correct compliant treatment is the second one. The importer who claims Mexican origin without supporting melt-and-pour documentation is at risk of post-entry reliquidation, 1592 penalties, and potential criminal exposure for the truly egregious cases.

Worked example: Korean-melt steel via POSCO

500,000 USD of HTS 7208.39 hot-rolled coil from POSCO Korea. Melt at POSCO Pohang, pour at Pohang slab caster.

The melt-and-pour certificate documents the Korean origin clearly. POSCO issues this as standard practice with every shipment.

What the certificate must contain

CBP guidance for Section 232 affidavits specifies:

1. Country of melt. The country where the steel was melted in a primary steelmaking furnace (BOF, EAF, induction). Identify the specific country, not "EU" or "Asia".

2. Country of pour. The country where the molten steel was first cast into a solid form. Typically the same as melt but can differ if molten metal is transported across borders (rare).

3. Mill name and facility location. The producer's full corporate name plus the physical address of the melting and casting facility.

4. Heat number(s). Unique batch identifiers for the specific shipment. A mill's MTR (mill test report) typically lists the heat number. The Section 232 certificate ties the heat numbers to the melt-and-pour origin.

5. Producer signature and date. Attesting that the data is accurate. The signatory accepts liability under 19 USC 1592 for false statements.

Most steel mills issue the melt-and-pour certificate as part of their standard commercial documentation. POSCO, ArcelorMittal, JSW Steel, Tata Steel, Nucor, Steel Dynamics, US Steel, JFE Steel all have standard formats. Smaller mills may need a custom request.

Multi-tier processing chain

For steel that passes through multiple processing stages (mill -> service center -> fabricator -> exporter), the certificate chain must trace back to the original mill.

Example chain:

1. Brazilian mill (Gerdau) melts and pours billet. Issues melt-and-pour certificate identifying Brazilian melt.
2. Mexican service center (a Gerdau subsidiary in Monterrey) receives the billet, cuts to length, and re-exports. The service center adds a continuity statement: "This shipment of HTS 7214 rebar contains material from heats #ABC, DEF, GHI per the attached Gerdau Brazil melt-and-pour certificate. No re-melting or pouring occurred at this facility."
3. US importer receives the rebar with the original Gerdau certificate plus the service center continuity statement.

CBP accepts this chain. The original mill certificate is the controlling document. Continuity statements at intermediate stages prove no substantial reprocessing changed the origin.

CBP enforcement posture in 2026

CBP's Section 232 enforcement has tightened since the rate doubled to 50 percent in June 2025. Audit triggers include:

• Steel from Mexico or Canada where Asia or Russia is the suspected upstream melt source.
• Steel from Vietnam, Malaysia, Indonesia where China is the suspected upstream substrate (anti-circumvention basis).
• Steel from EU member states where Russia or Ukraine is the suspected upstream melt.
• Any shipment without a melt-and-pour certificate.

Audit penalty for misrepresented origin: under 19 USC 1592, up to two times the duty loss for negligence, four times the value of merchandise for fraud. For typical Section 232 misrepresentation, the duty loss can be 25 to 50 percent of invoice value, so penalties can be 50 to 200 percent of invoice value.

What importers should do

1. Request melt-and-pour certificate from every steel supplier. Make it a standard purchase order requirement. No certificate, no order.

2. Set up master melt-and-pour records for recurring suppliers. A master certificate covering an annual production allocation, refreshed annually, plus per-shipment heat number lists. Reduces per-shipment documentation overhead.

3. Verify the certificate matches the MTR. Heat numbers on the certificate must match the heat numbers on the MTR. Mismatch is a red flag for audit.

4. Document the multi-tier chain. For steel routed through service centers or fabricators, get continuity statements at each stage. CBP audit will follow the chain back to the original mill.

5. Reject shipments without certificates. The duty risk and 1592 penalty exposure dramatically exceeds the cost of saying no to a non-compliant supplier.

Run your steel entry now

The LandedFees calculator handles Section 232 melt-and-pour origin verification, the TRQ status by country, and the full duty stack including ADCVD, Section 301, Section 122. Flags missing certificates and computes the default-rule penalty if origin documentation is incomplete.

Calculate a steel entry

Section 122 status as of June 20 2026

The May 7 2026 Court of International Trade ruling in Oregon v. United States (consolidated with Burlap and Barrel v. United States) struck down the Section 122 proclamation. The Federal Circuit issued an administrative stay on May 12 2026, so CBP is still collecting the duty pending appeal. Importers paying now should preserve protest rights and refund claims in case the government loses on the merits. The underlying Section 122 authority sunsets July 24 2026 under the statutory 150-day ceiling, regardless of the appeal outcome, unless Congress extends or a fresh proclamation restarts the clock.

Citations

• Section 232 steel proclamation 9705 (March 8 2018): Federal Register
• Section 232 steel 50 percent proclamation June 4 2025: Federal Register
• 19 CFR 132 (country of origin): https://www.ecfr.gov/current/title-19/chapter-I/part-132
• 19 USC 1592 (penalties for false statements): https://www.cbp.gov/trade/programs-administration/penalties/1592
• CBP Section 232 affidavit guidance: CBP CSMS