Limestone Quarry Plant

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QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association


X80 grade steel pipe strength

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(1) The reduction of carbon content to an extremely low level resulted in excellent low-temperature toughness.
(2) The application of the new microstructure concept with  precipitation-hardened  bainitic  ferrite  enabled the production of pipes by a hot strip and ERW pro- cess. The mechanical properties were favorable.
X80 grade steel pipe
(3)  An   X80   g rade   strength   and   excellent   low- temperature toughness of the base material and weld were  achieved.  The  toughness  value  of  vTrs  was below −50°C for each weld and base material.
(4) This material also has good weldability for girth welding because of the low Pcm value.

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