http://www.jhpetroleumtools.comExport DepartmentWalte HuangPhone: 86 - 371 - 86097877/86 - 15239152560Fax: 86 - 371 - 66882292
15F,No.3 Building,Futian Fortun Plaza,Hanghai East,Zhengzhou ChinazhengzhouChina, 450061Web Page Link: http://www.toboc.com/henanjanhuiconstructionmachinerycoltd
Our company act to the users request to produce Kelly and hexagonal Kelly, the length is usually about 12.19 meters, uses AISI 4145H alloy structural steel manufacturing, and carries on the quenching and tempering treatment in the full length scope. The techniqueof production and the technical standard are completely in accordance with API, under the room temperature,the surface is removed by inch through heat treatment. Brinell hardness is tested to be possible to achieve reaches 285-341, minimum Charpy impactvalue is 54J.
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Henan Janhui Construction Machinery Co.,Ltd