Metalworking and Pomona's Manufacturing Heritage
The Pomona Valley has long been home to machine shops, fabrication businesses, and suppliers tied to Southern California's aerospace and defense industries. Today, local metalworking companies produce parts for aircraft, electric vehicles, medical devices, construction projects, and industrial equipment. Many small and mid-sized fabricators in Pomona, Chino, Ontario, and the San Gabriel Valley depend on steel and aluminum service centers for materials and on larger metalworks firms for specialized processes.
Metalworking has also evolved with technology. Fiber lasers, robotic welding, CNC press brakes, and advanced inspection tools allow companies to produce precise parts quickly and efficiently.
Ranking Criteria
We evaluated companies on material range, processing capabilities, quality certifications, delivery reliability, and relevance to Pomona-area customers. The list covers metals service centers, primary metal producers, forgers, rebar fabricators, and structural steel specialists.
The Top 10 Best Metalworks Companies in Pomona
1. Reliance Inc.
Reliance, long known as Reliance Steel and Aluminum and originally founded in Los Angeles, is one of the largest metals service center companies in North America. Through many subsidiaries in Southern California, it supplies steel, aluminum, stainless, and specialty metals with cutting and processing services. Pomona fabricators benefit from Reliance's broad inventory and fast delivery.
2. Ryerson
Ryerson is a leading value-added processor and distributor of industrial metals. It offers carbon steel, stainless, aluminum, and fabrication services such as laser cutting and forming. Ryerson's digital ordering tools and processing capabilities help Pomona manufacturers reduce in-house work and receive parts that are ready for assembly.
3. Kaiser Aluminum
Kaiser Aluminum produces semi-fabricated aluminum products including plate, sheet, extrusions, and rod for aerospace, automotive, and industrial markets. The company has deep roots in Southern California. Pomona aerospace suppliers and manufacturers depend on Kaiser's high-strength alloys and consistent quality for demanding applications.
4. Weber Metals
Weber Metals, based in Southern California, is a leading producer of large aluminum and titanium forgings for aerospace. Its massive forging presses produce critical components for aircraft structures. Weber Metals exemplifies the region's advanced metalworking strength and supports a network of machining and finishing shops throughout the Pomona area.
5. Nucor
Nucor is the largest steel producer in the United States and a leader in recycled steel manufacturing using electric arc furnaces. Its products include rebar, structural steel, sheet, and plate. Through service centers and fabricators in Southern California, Nucor steel supports Pomona's construction and industrial sectors with sustainable, domestically produced material.
6. Schuff Steel
Schuff Steel is one of the largest structural steel fabricators and erectors in the United States, with a strong presence in the western states. It handles complex commercial, healthcare, and infrastructure projects. For large Pomona-area construction projects requiring structural steel frameworks, Schuff offers engineering, fabrication, and erection expertise.
7. O'Neal Steel
O'Neal Steel is a large family-owned metals service center offering carbon, stainless, and aluminum products along with processing services such as cutting, forming, and machining. Its focus on value-added processing helps manufacturers streamline operations. Pomona businesses appreciate O'Neal's customer-focused approach and ability to supply near-finished components.
8. Olympic Steel
Olympic Steel is a metals service center that processes and distributes carbon, coated, and stainless steel, aluminum, and tubular products. It also provides fabrication services for equipment manufacturers. Its broad capabilities make Olympic Steel a flexible partner for Pomona companies that need both raw materials and fabricated parts.
9. Pacific Coast Steel
Pacific Coast Steel is a major rebar fabricator and installer serving the western United States. Reinforcing steel is essential for foundations, bridges, and parking structures. Pomona contractors working on concrete projects rely on Pacific Coast Steel for accurate fabrication, detailing, and on-site installation that meets California's seismic requirements.
10. Samuel, Son and Co.
Samuel, Son and Co. is a family-owned metals processor and distributor that supplies steel, aluminum, and stainless products along with industrial packaging and processing services. The company is known for long-term customer relationships and technical expertise. Its services help Pomona manufacturers secure consistent material supply and reduce processing costs.
Trends in Metalworking
Metalworking is being transformed by automation, digital ordering, and sustainability. Electric arc furnace steel with high recycled content is reducing carbon emissions. Fiber laser cutting and robotic welding are increasing throughput for fabricators. Aerospace demand is rising, while electric vehicles and renewable energy projects are creating new markets for aluminum and specialty steel. Supply chain resilience has also become important, encouraging manufacturers to work with domestic metal suppliers.
The Workforce Behind Pomona Metalworks
Skilled welders, machinists, and fabricators are in high demand throughout the Pomona Valley. Community colleges, trade schools, and apprenticeship programs across the region train workers in welding certification, CNC programming, and blueprint reading. Companies that invest in training and safety culture tend to deliver higher quality and more reliable lead times, which is worth considering when selecting a metalworks partner.
Selecting a Metalworks Partner
Pomona businesses should consider material availability, processing services, certifications, and delivery performance when choosing a metalworks partner. Visiting facilities and reviewing quality systems can help ensure a good match. The companies above represent the strongest metalworking resources available to customers in Pomona and the surrounding region.