At Marmon Keystone, we understand the backbone of any thriving community starts with reliable, long-lasting infrastructure. Whether it’s bridges, highways, water systems, rail networks, or energy pipelines, the materials used in construction must meet the highest standards for strength, precision, and durability. That’s why infrastructure contractors, fabricators, and engineers across North America rely on Marmon Keystone as their trusted partner for steel and aluminum products designed to stand the test of time.
With decades of experience serving the infrastructure sector, Marmon Keystone supplies a wide range of structural and mechanical tubing, pipe, bar, and specialty steel and aluminum products that meet the stringent demands of heavy construction environments. Our product portfolio is engineered to support critical applications — from foundational frameworks to water transport systems — ensuring compliance with industry regulations and optimized performance under extreme conditions.
Our extensive inventory of carbon steel, stainless steel, and aluminum products is available in a variety of grades, shapes, and sizes, ready to ship from strategically located distribution centers across the U.S., Canada, and Mexico. This allows us to meet tight construction deadlines while helping reduce material shortages on job sites. Whether you’re reinforcing a highway overpass, assembling light poles, building pipeline systems, or fabricating modular structures, Marmon Keystone offers products and processing services tailored to your project’s exact requirements.
Beyond supplying raw material, we provide full-service processing including saw cutting, beveling, threading, kitting, and just-in-time delivery — helping infrastructure contractors streamline operations and lower project lead times. Our ISO-certified quality systems ensure that every piece of material we supply meets or exceeds industry and customer specifications, giving you peace of mind when timelines and safety are on the line.
Marmon Keystone is more than just a metal supplier — we’re a strategic partner invested in the success of infrastructure projects large and small. From DOT-approved materials to customized logistics solutions, our team is committed to helping you build smarter, safer, and stronger structures.