Our
company may act according to the user the request to produce Kelly
and hexagonal Kelly, the length usually is
*2.*9 meters, uses AISI ***5H alloy
structural steel manufacturing, and carries on the quenching and tempering treatment in the full
length scope. The technique of production and the technical standard are completely in
accordance with API, after heat treatment, apart from
surface inch under to sampling under the room temperature to test
its Brinell
hardness to be possible to achieve reaches ******1, minimum Charpy
impact
value is *4J.
