The world largest steelmaker, ArcelorMittal, reported the first quarter earnings lower than previous analysts’ estimation on short output in Kazakhstan and Ukraine by winter weather.

It reported its earnings before interest, tax, depreciation and amortization increased to US$1.89 billion from US$833 million one year ago. However, the number is smaller than average forecast of $ 2.05 billion.

ArcelorMittal said it will keep raise output and prices on improved economy, soaring raw material prices.