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non-magnetic drill collars
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Journal Articles
Alloy Digest (1999) 48 (6): SS-748.
Published: 01 June 1999
... alloys elasticity fatigue properties fracture toughness hardness heat treatability joinability machinability magnetic permeability non-magnetic drill collars physical properties tensile properties thermal properties UNS S21000 CARPENTER SCF 19® ALLOY (Austenitic Low-Magnetic Permeability...
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Carpenter SCF 19 alloy is a high-strength and low-magnetic permeability alloy developed for nonmagnetic drill collars. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: SS-748. Producer or source: Carpenter.
Journal Articles
Alloy Digest (2002) 51 (9): SS-862.
Published: 01 September 2002
...: intergranular and transgranular. Intergranular SCC is caused by microstructural sensitization of the steel. It has been largely eliminated in modern non-magnetic drill collar (NMDC) manufacture by strict analytical control during steelmaking. Material from all Allvac Ltd. (Jessop Saville Oilfield Products...
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Datalloy 2 is an enhanced corrosion-resistant nonmagnetic stainless steel. The composition contains a high level of manganese and nitrogen to stabilize the austenite. Applications include replacement of standard chromium-manganese steels in drill string components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as machining. Filing Code: SS-862. Producer or source: Allvac Ltd.
Journal Articles
Alloy Digest (2002) 51 (11): SS-868.
Published: 01 November 2002
... structural stability of the alloy ensures that mag- netic permeability remains below 1.005. Drill collars made from this alloy are tested over their full length using a Foerster 1.068 magnetoscope and a 1.005 4.502 differential probe and are certi- fied free from magnetic hot spots (maximum deflection = ±0.5...
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Staballoy AG 17 HS is an improved version of Staballoy AG 17 (see Alloy Digest SS-857, July 2002) with similar characteristics, but with higher yield strength and better fatigue properties. Applications include critical nonmagnetic drill stem components. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance. Filing Code: SS-868. Producer or source: Allvac Ltd.
