The Sajjan Jindal-led firm had produced 1.28 million crude steel during April 2017, JSW Steel said in a statement.
The company registered four per cent rise in production of flat rolled products at 9.67 LT as against 932,000 in April last year.
The output of long rolled products during the month under review grew nine per cent to 324,000 from 296,000 LT in April 2017.
While flat products are used in automotive and consumer durables sectors, long products are mostly used in construction industry.
JSW Steel is a part of the diversified JSW Group, which has presence in steel, energy, infrastructure, cement and JSW Ventures.
It is the leading integrated steel company in India with an installed steel-making capacity of 18 million tonne per annum (MTPA).