SVST.L Regulatory News (SVST)

Tenaris and Severstal to form joint venture to build a welded pipe plant

in West Siberia

This announcement contains inside information

Moscow, February 5, 2019 -Tenaris S.A. (NYSE, Buenos Aires and Mexico: TS and MTA Italy: TEN) and PAO Severstal (MICEX-RTS: CHMF; LSE: SVST) announced today that they will create a joint venture to build a welded pipe plant to produce OCTG products in the Surgut area, West Siberia, Russian Federation. Severstal will have a 51% interest in the joint venture company, with Tenaris owning the remaining 49%. The commencement of the project is subject to regulatory approvals and other customary conditions.

The plant, which is estimated to require an investment of USD240 million and a two year construction period, is planned to have an annual production capacity of 300,000 tons. Through this joint venture, Tenaris and Severstal aim to serve the growing market for welded OCTG pipe products in Russia and neighbouring countries, combining Tenaris's knowhow in OCTG pipe manufacturing and sales with Severstal's expertise in producing high quality steel products.

Alexey Mordashov, Chairman of the Board of Directors of Severstal, commented: "Our strategic goal is to make Severstal the leader in the future steel industry. And the future belongs to those companies that can provide their clients with unique solutions based on excellent understanding of their needs. To offer the oil and gas market best-in-class OCTG products and a range of customized and innovative services we are happy to join forces with a global leader in the manufacturing and supply of high-quality welded and seamless steel pipes. The production will be located in close proximity to the main oil and gas companies which will ensure cost efficiency both for us and our customers' operations".

Paolo Rocca, Chairman and CEO of Tenaris, commented: "We are very pleased to form this partnership today with Severstal. By combining our respective strengths and our commitment to industrial excellence, we believe that we can support the Russian and CIS oil and gas industry with a world-class and very competitive alternative for high quality OCTG products and services. As in all our operations around the world, we seek to deliver solutions that help to make customer operations more efficient and cost-effective".

Severstal is a leading Russian steel producer of high value-added flat, long and tubular steel products for the construction, automotive, machinery and energy industries.

Tenaris is a leading global supplier of steel tubes and related services for the world's energy industry and certain other industrial applications.

Some of the statements contained in this press release are "forward-looking statements". Forward-looking statements are based on management's current views and assumptions and involve known and unknown risks that could cause actual results, performance or events to differ materially from those expressed or implied by those statements.

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PАО Severstal is one of the world's leading vertically-integrated steel and steel related mining companies, with assets in Russia, Latvia and Poland. Severstal is listed on RTS and MICEX and the company's GDRs are traded on the LSE. Severstal reported revenue of $8,580 million and EBITDA of $3,142 million in 2018. Severstal's crude steel production in 2018 reached 12.0 million tonnes. www.severstal.com

Tenaris manufactures and supplies welded and seamless steel pipe products, and provides related services and accessories for the oil and gas, energy, and mechanical industries. Using its worldwide manufacturing facilities and service centers, Tenaris offers all stages of supply chain management: manufacturing, procurement, distribution, and customer service in all active regions of the world. In addition to the US facilities, the company has manufacturing facilities in Argentina, Brazil, Canada, Colombia, Italy, Japan, Mexico and Romania. With a worldwide capacity of 3.7 million tons of seamless and 2.6 million tons of welded pipes, Tenaris commands nearly one-third of the global OCTG seamless products market. www.tenaris.com