ASTM a516 gr.70 steel plate’s two-stage controlled rolling

ASTM a516 gr.70 steel plate contains N b, iT microalloying element. When the final rolling temperature is too high, not only the grain size is coarse, but also the Ni carbon nitride formed at high temperature is very coarse, which will reduce the strength and toughness of the ASTM a516 gr.70 steel plate . Therefore, two-stage controlled rolling should be used in rolling process for ASTM a516 gr.70 steel plate, that is, austenitic recrystallization zone and austenite unrecrystallized zone rolling. Katalor introduce Unrecrystallized zone rolling of austenite for you.

Unrecrystallized zone rolling of austenite:
The chemical composition of the steel is different from that of austenite in the temperature range of 950 ~ AR3. The main feature of rolling in the unrecrystallized zone is that the chemical composition of the steel is not the same as that of the austenite non-recrystallized zone. In the rolling process, there is no occurrence of austenite re-crystallization. ASTM a516 gr.70 steel plate increases the recrystallization temperature of austenite with NB. Therefore,ASTM a516 gr.70 steel plate. The second open rolling temperature of ASTM a516 gr.70 steel plate is 9.50 ℃. Final rolling temperature control At 800 ~ 870 ℃, the thickness of steel plate is reduced to 16 mm, and the upper temperature limit of finish rolling is obtained. When the thickness is more than 16 m m, the middle and lower limit of finish rolling temperature is obtained.

As a ASTM a516 gr.70 steel plate manufacturer, we usually keep hundreds tons ASTM a516 gr.70 steel plate in stock each month. Based on these stock source, our advantage has spread into steel process like : cutting ( any size and any shape ) drilling, welding, milling, welding. We can also provide the ASTM a516 gr.70 steel plate in machining parts and steel structure.

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