About HS Code 681591
This category encompasses articles made from specific mineral substances like magnesite, magnesia (periclase), dolomite (dolime), or chromite, which are not ceramic. These materials are highly valued for their exceptional refractory properties, meaning they can withstand extremely high temperatures without degrading. They are crucial components in the construction of industrial furnaces, kilns, and other high-temperature processing equipment, particularly in the steel, cement, glass, and non-ferrous metals industries. Importers are typically heavy industrial nations requiring durable linings for their manufacturing processes. Exporters are countries possessing these mineral resources or advanced manufacturing capabilities to process them into specialized articles. Key aspects include the material's resistance to thermal shock, chemical attack, and mechanical wear in harsh environments, making them indispensable for modern industrial production.
Products Under This Code
Magnesia bricks (unfired), Dolomite refractory blocks, Chromite-magnesia ramming mixes, Periclase-carbon refractory shapes, Dolime linings, Magnesia-spinel articles
Real World Examples
RHI Magnesita refractory bricks (unfired), Vesuvius refractory masses, Magnezit Group products, Calderys monolithic refractories
Common Misclassification
Often confused with refractory ceramic goods in 6902 or 6903, but 681591 specifically covers non-ceramic articles, often bonded without firing or with different bonding agents.
Products Classified Under 6815.91
Trade Overview
China, Austria, and Germany are key players in manufacturing and trade of these specialized refractories, with major steel-producing nations as importers.
Frequently Asked Questions
What is HS code 681591?
HS code 681591 covers: Stone articles and articles of other mineral substances; containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite. This category encompasses articles made from specific mineral substances like magnesite, magnesia (periclase), dolomite (dolime), or chromite, which are not ceramic. These materials are highly valued for their exceptional refractory properties, meaning they can withstand extremely high temperatures without degrading. They are crucial components in the construction of industrial furnaces, kilns, and other high-temperature processing equipment, particularly in the steel, cement, glass, and non-ferrous metals industries. Importers are typically heavy industrial nations requiring durable linings for their manufacturing processes. Exporters are countries possessing these mineral resources or advanced manufacturing capabilities to process them into specialized articles. Key aspects include the material's resistance to thermal shock, chemical attack, and mechanical wear in harsh environments, making them indispensable for modern industrial production.
What products fall under HS code 681591?
Magnesia bricks (unfired), Dolomite refractory blocks, Chromite-magnesia ramming mixes, Periclase-carbon refractory shapes, Dolime linings, Magnesia-spinel articles
What are common misclassifications for HS code 681591?
Often confused with refractory ceramic goods in 6902 or 6903, but 681591 specifically covers non-ceramic articles, often bonded without firing or with different bonding agents.
How is HS code 681591 structured?
HS code 681591 is a 6-digit subheading under the Harmonized System. The first 2 digits (68) identify the chapter, digits 3-4 (15) identify the heading, and digits 5-6 (91) specify the subheading. This code is standardized globally by the World Customs Organization.