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API, nonmagnetic drill collar, lifting sub, spiral drill collar, Drill coolar, Manufacturer and Supplier - China(CN)
non-magnetic drill collar (003)
It is made of high quality low-carbon-alloy steel. The raw material undergo a rigorous analysis of the chemical composition by forging, through the testing of mechanical properties of hardness, toughness , impact value and intergranular corrosion cracking performance in order to reach the requirement of standards, at the same time owning a good low permeability and mechanical processing performance .
Magnetic permeability(MPS=1¡Ñ105/4?A/m)
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Free of host spots
