It's made from N1310 low carbonalloy-steel and forged by strict chemical analysis. By testing its mechanical properties, we can ensure  the material's hardness,toughness, impact value and corrosion resistance conform to the standard. It has favorable low-permeability and machining properties.Magnetic permeability (MPS=1×105/4πNm)

max:1.010

Average value: μr ≤ 1.005

field gradient (hot spots)

max: B ≤ 0.05

   We have some non-magnetic drill collars with specifications of 165, 159, 121 and 105, as well as some non-magnetic short drill collar with specification of 5.5m, 4.5m and 3m.

All customers ( old or potential) are warmly welcome.! Look forward our early and sincere cooperation.