Betachrome ND 18/ 8/ 5Mn type Basic coated Welding Electrodes giving radiographic quality weld and Excellent heat resistant properties upto 900 centigrade in 3. 15mm dia size as per ISO 3581- A: E 18. 8 Mn B22 or IS 5206: E 18. 8 Mn B20, Make: Ador, Diffusion, L & T, ADVANI OERILIKON