WYJ082-2006                    DIWA 353（13MnNiMo54）

1.scope：This procedure is applicable to thickness≤150mm DIWA353（13MnNiMo54）Steel production and inspection.

2.smelting process ：Electric furnace + vacuum refining outside the furnace of steel calm

3.Supply state：890～950℃normalized +620～680℃temperature

6.mechanical property

6.supply state of the steel plate and sample simulation of heat treatment after welding mechanical properties (horizontal) should meet the provisions of the table 2. Simulation of heat treatment process after welding：600±15℃，holding 7.0h，temperature rise：>300℃Rate of temperature≤150℃/h，temperature drop：>300℃Along with the furnace cooling，300℃below is not limit。

Table 2

Note ：（1）Listed in the table impact value for the average of the three specimens, allow a impact value less than rating, when shall not be lower than the 27 J.

6.2Steel normalized and backfiring state of high temperature instantaneous tensile properties meet each table 3 temperature system rules.

Table 3 Tensile properties of high temperature

7.surface quality

The surface of the steel plate should comply with quality EN100163-2 surface quality level Bz requirements