P540 is a special non-mag, austenitic Mn-Cr-N-steel with a Nickel-content of < 2 %
To learn more about P540 mechanical properties download the datasheet
Relative permeability: < 1,005.
Transgranular SCC: Prevented by special surface treatments (Hammer peening, roller burnishing, shot peening).
Intergranular SCC: The occurrence of material sensitization is prevented by quenching after warm-forging. Each collar is tested acc. to ASTM A 262, Pract. A and E, last edition.
Pitting Corrosion: Due to high chromium- , nickel- and nitrogen contents an excellent resistance to pitting corrosion comparable to nickelbase alloys is given.
Magnetic inspection: Drill collars are 100% tested by a proprietary probe-testing process using a Forster Magnetomat 1.782. ("Hot Spot"-test). Magnetic permeability of each collar is certified with the printout of probe-testing.
Ultrasonic inspection: Each collar is ultrasonically inspected over 100% of the volume according to ASTM E 114, last edition as a minimum level.
P540 Non-Mag Drill Collars meet all requirements of API Spec. 7.1, last editions. All tests are carried out according to ASTM-Standards, last editions.
Prepared / released: B. Holper- Date: June 2013