Kelly Bar (API Spec 7) is a Mining Machinery product. Key specs — Brand: MＥＩＨＵＡＬＩＮ; Origin: China.
Product Description
*Features of Kelly Bar (API Spec 7): Our company offers square and hexagonal kellys. Kellys are available up to 46 feet kellys are made from 4145H modified alloy bars that are quenched and tempered full length. A hardness range of 285 to 341 BHN and a minimum impact value of 40ft-lbs are maintained one inch below the surface at room temperature.
All ends and center of Kelly Bar drive sections trepanned to provide true bores. They are drifted to API specifications, and all connections are machined. Kellys are stamped with the API monogrom, where applicable. *The parameter of Kelly Bar (API Spec 7):Bottom Upset Yield Strength Tensile Strength Elongation Brinell Hardness Impact AKV
σb(MPA) σs(MPA) δ4(%) HB (J)
85.7174.6 ≥758 ≥965 13 ≥285 54
177.8 ≥689 930 13 ≥285 54
