Non-magnetic Drill Collar
It’s made from N1310 low carbon alloy-steel, refined and forged by strict chemical analysis to reach its mechanical properties. It has favorable low-permeability, high-strength mechanical properties, great splitting properties of corrosion resistance and excellent abrasion performance.

Magnetic Permeability (MPS=1 x 10 5/4πNm）)
Max. : 1.010
Average Value: μr ≤ 1.005　
Field Gradient (Hot spot)
Max.: B ≤ 0.05
　
Mechanical Properties of Non-magnetic Drill Collar
OD Range (mm) Yield Strength
(Mpa) Tensile Strength (Mpa) Elongation Brinell Hardness Charpy Impact Value AKV(J)
79.4～171.4 ≥758 ≥827 ≥18
177.8～279.4 ≥689 ≥758 ≥20