EXPORT OF GOODS - Goods and Services Tax - GST

One GST registered supplier has received an order of supply of steel plates (along with some specific cutting work on steel plates as required by the buyer using CNC machine) from a foreign buyer and it will pay the proceeds in convertible foreign exchange. The goods will be made available ex-factory i.e. buyer will take the goods from factory on its own and will send it outside india. The question is whether this supply will be considered as an export for the Indian registered supplier? please reply with references to law. thanks in advance .