The Sigma Lab Materials Testing Laboratory is accredited according to SRPS ISO/IEC 17025 for mechanical and metallographic testing of metals and welded joints. The laboratory provides support for material testing required for welding procedure qualifications, welder certification, material requalification, testing of reinforcing steel for concrete, as well as inspection and testing of welding equipment. Testing is performed in accordance with national (SRPS) and/or international standards such as DIN, GOST, and AWS.