• Head Office
    PASO Tower 24th, Silom Road
    Suriyawongse, Bangrak,Bangkok
    Tel 02-267-8222

  • Factory
    WHA Chonburi Industrial Estate 1, 358
    Bowin, Sriracha, Chonburi 20230
    Tel (038) 345 950


G J Steel Public Company Limited - GJS 

firstly established in January 1994, is a world class manufacturer of Hot Rolled Coil (HRC) aiming to substitution of imports and meeting domestic customer demands. The plant locates on 500-Rai area at Hemaraj Chonburi Industrial Estate distanced from Bangkok about 130 kilometers.

GJS is one of the largest steel mills in South East Asia. With an investment of 54 Billion Baht, GJS is a fully integrated steel mill consisting of: 

  1. Iron making plant - Direct Reduction Iron (DRI) technology.
  2. Mannesmann Demag Steel Making plant - one of the largest electric arc furnaces in the world with the ConSteel technology.
  3. SMS CSP Plant - Continuous Thin Slab Caster and 6- stand Finishing Mill with the CVC technology enables hot rolling of minimum strip thickness at 1.0 mm with maximum capacity at 3 million tons per annum.
  4. Recoil Temper Mill - improving coil flatness.
  5. Push-Pull Picking Line - pickling and oiling steel directly supplied to automotive and home appliance industries.
  6. Galvanizing & Galvannealing line - preventing rust corrosion. Such steel is mostly used in the automotive industry and steel roofing in the construction industry.

The aforementioned continuous process merely takes 3.5 hours in conversion of steel scrap and pig iron into the HRC, conforming to the international quality specifications for domestic as well as international markets.

GJS has achieved ISO 9001, CE Mark and OHSAS 18001 Since 2005, 2006 and 2007 respectively.