– Certification and standards: API Spec 7-1, API Spec 7-2, Q1 and ISO
9001, ISO 29001 and NS-1
– Square and Hexagonal Kelly
– Steel grade: AISI 4145H mod, fully heat treated as per API Specification
Technical parameters
– Size between facets: from 76,2 mm (3”) up to 155,0 mm (6 1/8”)
– Standard overall length: 9000 mm – 16460 mm
– Standard API thread connections are made with stress relieved elements,
cold rolled and phosphated, and equipped with pressed steel or heavy
duty plastic thread protectors оn both ends
– At customer request Kellies are delivered in individual scabbards to
protect the work surface from mechanical damage during transportation
– Ultimate tensile strength: min – 140 000/965 ksi/mPa, Yield strength: min
110,000/758 ksi/mPa, Elongation: 15%, Impact strength: min 48J, Brinell
hardness: min 285-341 HB
– Mechanical properties guaranteed to
1” below steel surface.
