Hot-dip galvanized steel

American infrastructure products company (NYSE: VMI, HQ Omaha NE; ~$4.3B revenue); Valley® brand center pivot and lateral move irrigation systems division is the world's largest center pivot irrigation manufacturer — and the primary industrial consumer of galvanized steel tubing for irrigation applications. Each center pivot system requires approximately 4-8 tons of galvanized steel for its span tubes, towers, and A-frames. Valmont also manufactures utility steel poles, highway safety structures (guardrails, light poles), and wireless communication structures — using the same galvanized steel supply chain that feeds its irrigation division. Valmont Industries was founded in 1946 by Robert Daugherty in Valley Nebraska (from which the Valley® brand derives) to supply galvanized steel products to Nebraska farmers. The same Nebraska company that invented the center pivot irrigation system in the 1950s (in collaboration with Frank Zybach, who patented the self-propelled sprinkler concept in 1952) now manufactures irrigation systems for 54 countries. The circular fields visible from satellite imagery over Kansas, Nebraska, and the Sahara Desert are the geometric footprint of Valmont Valley® pivots irrigating crops in circles defined by the pivot's radius.

American steel company (NYSE: NUE, HQ Charlotte NC; ~$34B revenue at peak 2022); largest US steel producer by volume using electric arc furnace (EAF) mini-mill technology primarily with scrap steel feedstock. Nucor's Steel Technologies distribution subsidiary and Nucor's own galvanizing operations supply galvanized steel to center pivot irrigation manufacturers (Valmont, Lindsay) through its tubular products and steel processing divisions. Nucor pioneered the EAF mini-mill model in the 1960s-70s under CEO Ken Iverson, disrupting integrated blast furnace steel producers by using cheap scrap steel instead of iron ore — a management case study still taught in business schools. The same Nucor EAF innovation that disrupted US Steel and Bethlehem Steel in the 1970s now supplies the galvanized steel that makes center pivot irrigation systems that grow the corn in the Midwest and the wheat in the Sahel.

American infrastructure company (NYSE: LNN, HQ Omaha NE; ~$650M revenue); Zimmatic® brand center pivot and lateral move irrigation systems are the world's second-most-used center pivot brand behind Valmont Valley. Lindsay purchases galvanized steel tubing for its irrigation system fabrication in Lindsay NE. Lindsay Corporation also manufactures road safety barriers (Barrier Systems division) — using the same galvanized steel supply chain as its irrigation division. Nebraska's concentration of center pivot irrigation manufacturers (Valley/Valmont, Zimmatic/Lindsay, Reinke) in the Platte River valley of south-central Nebraska reflects the region's historical agricultural machinery expertise and proximity to the Great Plains irrigation market (the Ogallala Aquifer).

World's #2 steel producer; operates 3 US coke plants (as part of integrated steel mills in Indiana) that produce coal tar as a mandatory byproduct of the coking process. Coal tar is the raw material for creosote (railroad tie preservative). ArcelorMittal entered long-term coal tar supply agreements with Koppers Holdings through 2026. While ArcelorMittal does not make railroad ties, it is a critical upstream input supplier for the creosote that treats them. The 3 ArcelorMittal coke plants at Indiana Harbor (East Chicago IN), Burns Harbor (Portage IN), and Cleveland OH are primary US coal tar sources for the railroad industry.