Sandvik premium tubes for the Asian market tested with Zwick testing machines

Sandvik’s tube mill in Zhenjiang in China provides the rapidly growing Asian markets with premium quality tubes, manufactured in full accordance with Sandvik’s advanced production technology and unique manufacturing know-how. The mill manufactures seamless cold finished stainless steel tubes for heat exchangers and hydraulic and instrumentation systems. The existing testing capacity would not be sufficient for the resultant increased testing volume, so the company has decided to acquire a new Zwick high-temperature testing system.
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Tubes from Zhenjiang are primarily used in applications within the oil and gas, petrochemical, fertilizer, chemical, shipbuilding, automotive, and power industry.The premium quality of the stainless steel tubes is ensured with the state of the art on-site available testing capabilities. Tensile test on elevated temperature is carried out with a modern electromechanical testing system supplied from Zwick. The Zwick Roell Group is one of the world’s leading suppliers of materials and component testing systems. The specialty of the testing system is a non-contact Laser extensometer for the tube elongation, a carousel with 3 furnaces. The Laser extensometer uses the physics of the Speckle pattern for the elongation measurement on the hot tube surface.

The carousel allows a 3-times higher testing throughput because the tubes are pre-heated and cooled-down outside the test area. Further the tubes surface temperatures for all 3 tubes are recorded simultaneously during the heating up, testing and the cooling down period. The testing system is used 24/7 and highly efficient.

"We are very pleased to have got this testing machine as part of our tube testing capability. It will increase our possibility to meet our customers every day higher demands on our products. With this testing at elevated temperatures we can verify that our products are fulfilling the expectations when it comes to very high demands. Zwick has shown, with this installation, that they are capable of meeting our requirements on the testing of our special steel for very special demands.", states Anders Sjödén from Sandvik Materials Technology China Ltd.

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