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Low alloy type YS785 MPa rebars from JFE
JFE Steel
Sunday, 13 Jun, 2010

JFE TECHNICAL REPORT
No.15 Special Issue on “Steel Bar and Wire Rod”

The alloy composition, the manufacturing process and the product shape were optimized in order to decrease the amount of the alloy element of the YS785 MPa class shearing reinforcement.

Although the contribution of the Mo addition to the improvement of property balance was large, the target property was achieved without the addition of Mo by using the other alloy elements such as V.

However, the lower alloy has been proved to need the stricter control of cooling process. A highly accurate cooling speed and the cooling stop temperature control was achieved by controlling the velocity of blast air and the amount of air blast cooling time after hot rolling.

High strength has been united to excellent ductility by controlling the chemical composition and process condition.

Read full technical paper at
http://www.jfe-steel.co.jp/en/research/report/015/pdf/015-07.pdf

(Source - JFE)

 

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