Cobalt mattes and other intermediate products of cobalt metallurgy (HS 810520)
Cobalt mattes and other intermediate products of cobalt metallurgy (HS 810520) has 309 U.S. import bill-of-lading shipment records between Jun 2019 and Jul 2026. The largest U.S. importer of Cobalt mattes and other intermediate products of cobalt metallurgy is C STEINWEG BALTIMORE INC, with 48 shipments, followed by MITSUI AND CO USA and REMELT SOURCES INC. The leading supplier is MITSUI & CO LTD, with 58 shipments, followed by SHU POWDERS AFRICA PTY and HOGANAS GERMANY GMBH. Goods originate mainly from JAPAN and GERMANY, arriving primarily at BALTIMORE, MD. Import volume has risen over the past 12 months versus the prior year.
Sourced from U.S. Customs bill of lading data · Updated monthly · Data through July 2026
Shipments over time (last 24 months)
Trade flow: top suppliers → U.S. importers
The strongest supplier-importer relationships for Cobalt mattes and other intermediate products of cobalt metallurgy (HS 810520), by shipment volume. Hover a ribbon for details; click a name to open its profile.
The largest relationship is MITSUI & CO LTD → MITSUI AND CO USA with 30 shipments, followed by SHU POWDERS AFRICA PTY → C STEINWEG BALTIMORE INC (28) and INDUSTRIAL MARKETING CORP → REMELT SOURCES INC (26).
Top U.S. importers
| Importer | Shipments |
|---|---|
| C STEINWEG BALTIMORE INC | 48 |
| MITSUI AND CO USA | 30 |
| REMELT SOURCES INC | 26 |
| SCHENKER INC | 23 |
| MITSUI & CO USA INC | 19 |
Top suppliers
| Supplier | Shipments |
|---|---|
| MITSUI & CO LTD | 58 |
| SHU POWDERS AFRICA PTY | 38 |
| HOGANAS GERMANY GMBH | 33 |
| INDUSTRIAL MARKETING CORP | 26 |
| DARTON COMMODITIES LTD | 15 |
Origin countries
| Country | Shipments |
|---|---|
| JAPAN | 75 |
| GERMANY | 50 |
| BELGIUM | 44 |
| SOUTH AFRICA | 38 |
| FRANCE | 29 |
| NETHERLANDS | 16 |
| CANADA | 8 |
| NETHERLANDS ANTILLES | 7 |
| CHINA | 7 |
| MOROCCO | 7 |
Ports of unlading
| U.S. port | Shipments |
|---|---|
| BALTIMORE, MD | 103 |
| NEW YORK/NEWARK AREA, NEWARK, NJ | 60 |
| LOS ANGELES, CA | 28 |
| HOUSTON, TX | 26 |
| WILMINGTON, NC | 24 |
| CHARLESTON, SC | 17 |
| NORFOLK, VA | 9 |
| SAVANNAH, GA | 9 |
| CHESTER, PA | 8 |
| NEW YORK, NY | 6 |
Harmonized System classification
HS code 810520 — Cobalt mattes and other intermediate products of cobalt metallurgy. The Harmonized System is the international standard for classifying traded goods; U.S. Customs records this 6-digit code on every bill of lading.
Not sure this is the right code? Search all 5,700+ subheadings with the free HS code lookup, or see which product categories are growing in our quarterly State of U.S. Imports reports.
Frequently asked questions about importing Cobalt mattes and other intermediate products of cobalt metallurgy
Who imports Cobalt mattes and other intermediate products of cobalt metallurgy (HS 810520)?
Based on U.S. Customs bill-of-lading records, the top U.S. importers of Cobalt mattes and other intermediate products of cobalt metallurgy include C STEINWEG BALTIMORE INC, MITSUI AND CO USA, REMELT SOURCES INC, SCHENKER INC, and MITSUI & CO USA INC.
Who is the largest U.S. importer of Cobalt mattes and other intermediate products of cobalt metallurgy?
C STEINWEG BALTIMORE INC is the largest U.S. importer of Cobalt mattes and other intermediate products of cobalt metallurgy (HS 810520), with 48 bill-of-lading shipment records.
Who are the top suppliers of Cobalt mattes and other intermediate products of cobalt metallurgy?
Leading suppliers shipping Cobalt mattes and other intermediate products of cobalt metallurgy (HS 810520) to the U.S. include MITSUI & CO LTD, SHU POWDERS AFRICA PTY, HOGANAS GERMANY GMBH, INDUSTRIAL MARKETING CORP, and DARTON COMMODITIES LTD.
How many U.S. shipments of Cobalt mattes and other intermediate products of cobalt metallurgy are there?
ImportDoor has 309 U.S. import shipment records under HS code 810520, spanning Jun 2019 to Jul 2026.
Where is Cobalt mattes and other intermediate products of cobalt metallurgy imported from?
Cobalt mattes and other intermediate products of cobalt metallurgy is imported into the U.S. primarily from JAPAN, GERMANY, and BELGIUM.
Find Cobalt mattes and other intermediate products of cobalt metallurgy importers & suppliers
Get the complete list of U.S. importers and global suppliers for HS 810520, with contact details and container-level shipment records on ImportDoor.
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