Sigma Tube & Bar supplies steel to oil and gas equipment manufacturers. We stock tubes, bars, and blocks in carbon and alloy grades. Sigma provides value added services such as heat treating, machining, testing, sand blasting, straightening, inspection, saw cutting, etc. Although our company was founded in 2013 our employees average 20 years experience in oil field steel. Our salesmen understand your material requirements. Our quality department understands your document requirements. Our warehouse understands your service requirements. We have always provided same day service.