Otai is over 20 years experienced for 4140 plate, 4140 round, 8620 round, 4340 round bar. We know customers concern and avoid the problems on delivery.

We are ISO9001:2015 certified and our supplied products also pass SGS inspection. Quality is key to win long term cooperation customers.

As No. 1 Stockist of AISI 4140 steel plate, we keep daily stock of over 10000 tons from 4mm to 300mm thickness. Machined pieces are also available.

Our skilled and professional staff will solve your problems and worries pre sales or after sales. You are comfortable during our cooperation.