Steel mill workers lived and breathed heat. Blast furnaces, open-hearth and electric-arc furnaces, ladles, and soaking pits all ran at extreme temperatures, and for decades the refractory linings, insulation, and protective gear that made that work possible were allegedly made with asbestos. Furnace and ladle relining crews, bricklayers, millwrights, maintenance mechanics, and hot-metal workers were exposed to fiber every shift.
How Steel Workers Were Exposed
The heaviest exposures came during furnace and ladle relines, when crews knocked out worn refractory and installed new brick, castable, and gunning mix — cutting, mixing, and demolition all released dust into confined, dusty spaces. Around molten metal, workers wore asbestos gloves, aprons, coats, and leggings and stood behind asbestos curtains, handling that gear daily. Steam and utility lines feeding the mill were insulated with asbestos pipe covering; pumps, valves, and equipment flanges used asbestos gaskets and packing that mechanics cut and scraped during repairs.
The Asbestos Materials — and the Products They Came In
Exposure tracked to a handful of material types. Each links to products documented in the AsbestosIndex as allegedly asbestos-containing:
Furnace & ladle refractory — cut, mixed, gunned, and demolished during relines:
- Harbison-Walker asbestos-bonded blast furnace refractory brick · Harbison-Walker plastic refractories & castables
- A.P. Green asbestos refractory ladle gunning mix · General Refractories asbestos refractory board (reheat furnace), all allegedly asbestos-containing
Protective textiles — worn and handled around molten metal:
- Amatex woven asbestos cloth · A-Best fire-resistant garments & clothing · Bethlehem Steel asbestos welding blankets — allegedly asbestos-containing
Insulation — pipe covering and block on mill steam and utility lines:
- Johns-Manville Kaylo pipe insulation · Careytemp block insulation — allegedly asbestos-containing
Gaskets & packing — cut and repacked on mill pumps, valves, and flanges:
- Garlock compressed asbestos sheet gaskets · John Crane braided asbestos pump packing — allegedly asbestos-containing
Browse the full Refractory, Industrial Furnaces, and Textiles categories for more.
Take-Home Risk to Families
Like other dusty trades, steel workers carried asbestos fibers home on their clothing, skin, and tools — exposing spouses and children who never worked with asbestos. See take-home asbestos exposure.
If you worked in a steel mill and were diagnosed with mesothelioma or another asbestos-related disease after exposure to asbestos on the job, you may have a legal claim.
Product references reflect allegations documented in publicly filed asbestos litigation. This information is published by an independent media organization — not a law firm — and is educational only. It does not constitute legal advice or provide legal services.