Introduction - Guarantee The high safety levels required by the applications for which our steel is used, such as bridges, viaducts, nuclear power stations, and LNG tanks, and the stringent technical specifications which it has to meet, means that the quality control system is extremely important both during the manufacturing process and for the finished product itself. Our aim is to meet fully the requirements of each application. This has led us to modify our quality control system to meet the ISO 9001:2000 standard. Furthermore, TYCSA's products are authorised by AENOR, the certifying body for wire and prestressed strands, and carry the "N" mark as a sign of quality in the domestic Spanish market. Our interest in operating in all markets and our concern for the quality of our products has led to our products being approved or already receiving quality certification in almost all the countries where approval is required, eg: GERMANY, ARGENTINA, AUSTRIA, BELGIUM, SPAIN, FINLAND, FRANCE, HOLLAND, ITALY, NORWAY, PORTUGAL, SWEDEN, SWITZERLAND We also comply to all international specifications, such as: EUROPEAN EN CANADIENSE CSA CANADIAN ASTM RUSSA GOST BRITISH BS INTERNATIONAL ISO JAPANESE JIS A group of qualified technicians, using the latest, most sophisticated equipment make up our Quality Control Department, responsible for internal tracking and finished product quality checks. They have at their disposal all the testing equipment necessary to carry out the special tests and trials required by these products, such as the one-pin test, low relaxation tests, fatigue resistance, and corrosion under tension.