API 7-1 Non-magnetic Drill Collar Forging

API 7-1 Non-magnetic drill collar forging Product Description Product Description API certificated non-magnetic drill collar forging  1.HHF's non-magnetic products include non-magnetic drill collar, non-magnetic flex collar, non-magnetic stabilizer,etc. 2.Strict control of chemical composition and low temperature forging guarantee the excellent mechanical properties of our non-magnetic products. 3.Tensile strength is 10 to 20 percent higher than the requirement of API Spec7-1. 4.Minimum Brinell hardness is above 285 and minimum impact value is over 130 Joules. 5.Our non-magnetic products are highly corrosion-resistant , which greatly extends the service life of drilling tools in a corrosive atmosphere. 6.The maximum relative magnetic permeability of non-magnetic tools can be controlled to less than 1.005, which increases the  accuracy of  measurements taken during directional drilling. 7.Mechanical properties specified according to API Spec7-1 are as followings:   Chemical composition  of non-magnetic drill collar forging : Material  Chemical composition    % C Si Cr Mn Ni Mo N W-1 0.08 max  0.8 max 13.5-16.5 16.0-18.5 1.0-3.0 0.40-0.85 0.25-0.40 W-2 0.03 max 0.8 max 13-16 18.5-22.0 1.0-3.0 0.4-0.80 0.30-0.45 W-3 0.03 max 0.8 max 16.5-18.5 18.5-22.0 1.0-3.0 0.4-0.80 0.50-0.80     Mechanical  properties of non-magnetic drill collar forging: Material  OD range Yield strength  Tensile strength  Elongation  A% Charpy V value  Hardness  (HB) mm MPa ksi MPa ksi 21℃ -25℃ W-1 79.4-174.6 ≥758 ≥110 ≥827 ≥120 ≥20 ≥85 ≥40 285-400 177.8-279.4 ≥689 ≥100 ≥758 ≥110 W-2 79.4-174.6 ≥827 ≥120 ≥896 ≥130 ≥25 ≥150 ≥40 285-365 177.8-279.4 ≥758 ≥110 W-3 79.4-174.6 ≥965 ≥140 ≥1034 ≥150 ≥20 ≥100 ≥40 300-400 177.8-279.4 ≥896 ≥130