O Brien Steel Service has produced high-quality steel products since 1975. This full-line, carbon steel service center s inventory includes standard steel S beams, W beams, channels, angles, plates, sheets, bars, pipe and structural tubing. The company s custom processing services include sawing, flame cutting, plasma cutting, robotic plasma beveling, machining and shearing to customer specifications. O Brien s manufacturing facility is ISO 9001:2000 certified. The company is located in Peoria, Ill.