The previous best was in the month of March at 511 tons, the company said in a statement.
The first four months of the current fiscal from April to July saw a growth of 40.22 per cent over the corresponding period last year in terms of dispatch, it said.
The special plate plant (SPP) specialises in production of heat-treated (Q&T) armour grade plates for ordnance factories and the Indian Navy, the statement said.
The department has produced and dispatched about 88,000 tons of special plates to various defence organisations since its inception in 1969.
The SPP is presently is in the process of ramping up production of quenched and tempered plates for defence and other non-defence applications, it added.
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