The importance of quality

Our commitment to quality has been a constant feature of our development across seven decades and is a key feature in our success as a global producer.

We are committed to providing the highest quality railway wheels according to the specifications and requirements of the customer, corresponding to strict international standards. Our products are guaranteed by the quality control and management system certified by TUV (Germany) corresponding to the norms of ISO 9001:2008 and Assocition of American Railroads with AAR M-1003.

In 2010 KLW has also passed an audit for the Quality management system of wheel products meeting the demands of the RISAS standard (Railway Industry Supplier Approval Scheme).  

Quality control is enforced at all stages of product manufacturing – from steel melting to the acceptance test of wheels and tyres. Our focus on reliability includes a wide range of measures including reducing residual stress and increasing durability as well as using mechanical, chemical and metallographic control measures in the Interpipe NTRP Central Laboratory.

Quality control is effected at all the stages of product manufacturing – from steel melting to the acceptance test of the wheels and tyres:

1. Control of the chemical composition of rawmaterials, steel during melting process, ready rolled-stock is effected on the spectrometers “Polyvac 2000” type

2. Control of hydrogen content in liquid steel is effected before and after vacuum degassing using sound determination by “HYDRIS” device of company “Heraeus Elecro-Nite”

3. Control of nitrogen, oxygen, hydrogen content is performed at the devices PH-402 and TS-236 of the firm “Leco”

4. 100% automated Ultrasonic test as well as magnetic particle of ready products, is effected to determine the presence of internal defects inspection

5. Control of the hardness on the rim surface of the wheels and tyres is realized during the production using durometer of “EMCO” company

6. Metal testing for elongation is realized at the machine UTS-600-1 with microcomputer control and automatic registration of parameters and printing-out of the results

7. Pendulum testing impact machine Psd 50/15 of “Wpm Werkstoffprufmaschinen GmbH” company is used to determine the impact strength of steel

8. The determination of steel toughness K1C according to the ASTM-E 300 is effected on the universal computerized testing machine “Hydropuls Sinus 250” by company “Carl Schenk”

9. By the request of the customers the testing of wheels and tyres by the falling weight or static compression, as well as the control of micro – and macro structure and nature of stresses are made by the up-to-date methods