Marmon/Keystone’s Aluminum Rectangular Tubing B221 is a trusted choice across industries that demand strength, lightweight performance, and corrosion resistance. It is especially well-suited for the manufacturing of boat trailers, where exposure to water, salt, and varying weather conditions requires durable and reliable materials. By reducing overall trailer weight without sacrificing strength, aluminum rectangular tubing enhances…
Marmon/Keystone first established operations in Monterrey, Mexico, in 1994. Earlier this year, the team expanded with the opening of a full-service center featuring 75,000 square feet of warehouse space and industry-leading equipment to meet growing market demand. Serving as the regional headquarters for Mexico operations, this facility also supports the satellite center in Querétaro, providing…
Marmon/Keystone’s stainless tubing inventory provides a wide selection of high-quality stainless steel tubing to serve a variety of industries. Offered in multiple grades, including 304, 316, and 321, our tubing delivers exceptional corrosion resistance, strength, and long-term durability. From fluid handling and heat exchangers to structural applications, Marmon/Keystone stainless tubing is engineered for precision, reliability,…
Marmon/Keystone’s alloy tubing 4142 is a trusted material in the oil and gas industry. Known for its exceptional strength, toughness, and resistance to wear and fatigue, this alloy is engineered to perform in the most demanding conditions. It is widely used in drill pipes, tubing, and pressure vessels, where the ability to withstand extreme pressures,…
Do you source products from one supplier and then rely on another to cut them to size? Allocating valuable manufacturing space and resources just to cut material to length can be costly and inefficient. With Marmon/Keystone LLC’s custom-cut program, your products arrive ready to use—directly from us. That means no investment in cutting equipment, no…
We’ve completed our inventory count and identified a surplus on select items. That means our excess can be your opportunity to save. We currently have strong availability in Hot Rolled Seamless Tubing, Carbon Pipe-Seamless, and Carbon Pipe-Welded. Plus, enjoy no freight charges on surplus inventory orders over 5,000 lbs. Visit us at https://marmonkeystone.com and click…
Marmon/Keystone LLC’s finished honed and suitable-to-hone hydraulic cylinder tubing A513 is widely used in hydraulic applications across industries such as construction and manufacturing. Engineered for smooth, high-precision surfaces, this tubing ensures optimal performance for hydraulic cylinders, pumps, and pistons. Its refined finish helps reduce wear and friction, extending the service life of machinery. From heavy-duty…
It is with profound sadness that the Marmon/Keystone family extends our deepest sympathies to everyone impacted by the tragic explosion at U.S. Steel. Your dedication, hard work, and sacrifices have not only strengthened communities but also helped build a nation. May you find comfort in cherished memories and in the lasting respect of all who…
Marmon/Keystone LLC’s JIC Hydraulic Tubing Seamless J524 A179 is engineered for high-pressure hydraulic applications in both the automotive and industrial equipment industries, where strength and reliability are critical. Its seamless design provides superior resistance to fatigue and pressure, making it well-suited for fluid transfer systems, hydraulic lines, and pumps. With excellent corrosion resistance and the…
Marmon/Keystone LLC’s square stainless tubing (A554) is a trusted choice across the transportation industry. It is commonly used in the manufacturing of structural components for vehicles, trailers, and railings, as well as in support frameworks for transportation equipment. Engineered for strength, corrosion resistance, and a clean appearance, A554 tubing is ideal for applications such as…
