Determination of yield point and yield strength of A515 grade 65 pressure vessel steel sheet

The yield rate is a comprehensive technical and economic index in the production of medium and heavy plates such as A515 grade 65 pressure vessel steel sheet. Increasing the yield rate can not only reduce the loss of metal, but it is also vital to the economic benefits of the steel enterprise. The influencing factors of the yield of medium and heavy plates are various, for example, the variety structure, negative deviation rolling level, plate shape control level, cutting loss, rolling waste and burning loss, etc.

Normalizing is to heat the steel parts to 30~80℃above the critical temperature for a period of time. Then the parts are taken out of the furnace and cooled in air. Since the cooling rate of normalizing is faster than that of annealing, the strength and hardness of normalized A515 grade 65 pressure vessel steel sheet are higher than that of annealed A515 grade 65 pressure vessel steel sheet, but the elimination of internal stress is not as good as annealing. The normalizing operation of A515 grade 65 pressure vessel steel sheet is simple, the cost is low, the productivity is high, and it is widely used in actual production.

A515 grade 65 pressure vessel steel sheet, High-strength steel plates are widely used in many industries such as construction, automobiles, ships, machinery and equipment, but high-strength steel plates must be selected appropriately. First, the grade is too high, which means that the price will be high because of the high manufacturing cost. Second, the low level means that the safety performance cannot meet the standard. Third, we must strictly follow the design drawings to select high-strength steel plates specifications. Fourth, it is advised the purchaser to test the high-strength steel plates with special equipment.

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