Diamond Manufacturing Company
Perforated and Value Added Metal Specialists

Discover Diamond by the Numbers

As North America's perforated and value-added metal specialist, we strive to outperform and exceed our customers' expectations. Below are highlights that represent the Diamond Difference:

  • One-half million square feet dedicated to production lines
  • Value-added services that continue to evolve
  • Wide variety of fabrication equipment and services
  • 4,000-plus tool room that continues to grow
  • Engineering and design teams in-house
  • In-stock inventory available
  • Quality control testing and retesting
  • Custom packaging to meet our customers' demands

While capabilities and equipment are important, our talented team of experts is our secret sauce. For more than 100 years, Diamond recruits the best and brightest talent available. Our products and services reflect this talent every day and our dedication to customer satisfaction is unprecedented in the industry.

4,000 patterns in stock
56 perforating presses
300,000 holes perforated per minute
6 strategic locations
Key milestones: 1915 founded, 2010 aquired
5,124 perforated coils per year
500,000 square feet across all facilities
Quality in focus: 0.23% rejection rate
6 lasers with automation
8.1M pounds of steel perforated daily, 97.2M pounds of steel perforated yaerly

Diamond Manufacturing Company

Diamond Manufacturing is a wholly owned subsidiary of Reliance Steel & Aluminum Co.

Reliance Steel & Aluminum Co.

Site designed and developed by Blair Inc.

Site designed and developed by Blair Inc.