Kelly

Square and Hexagonal Kelly
Size Range: Square 2-1/2--6 Hexagonal 3--6
Mechanical properties can meet API SPEC 7-1
Brief Introduction

Made of AISI4145H alloy steel, the end, drive section and connection of the Kelly are machined and inspected according to API requirements.

Size Range
Square 2-1/2”——6”
Hexagonal 3”——6”

Mechanical Properties

Bottom
OD

Yield Strength


Tensile strength
Elongation

Hardness
Brinell
HB
Impact
AKV
σb(MPA)
σs(MPA)
δ4(%)
HB
Ακ(J)
85.7——174.6
≥758
≥965
13
≥285
54
177.8
≥689
930
13
≥285
54

Usage
The Kelly is the drive section of the whole stem.