Print Friendly, PDF & Email

Data sheet P 540

Revision 0 Preliminary

1. CHEMICAL COMPOSITION

„P540“ is a special nonmagnetic, austenitic Mn-Cr-N-steel with a nitrogen content of ≤ 2%.

CMnCrMoNNi
max. 0,0519,00 - 21,00 17,00 - 19,500,30 - 0,80min. 0,500,80 - 2,00

2. MECHANICAL PROPERTIES

Following mechanical properties (tested at room temperature) are achieved by a special cold-working process over the full length of the collar:

textodksiN/mm
Yield Strength (min.) 0,2%-offset method:OD up to 9 1/4“120 ksi830 N/mm²
OD 9 1/2“ and larger110 ksi760 N/mm²
Tensile Strength (min.):130 ksi900 N/mm²
Elongation (min.):20%20%
Reduction of area (min.):50%50%
Impact energy (min.):90 ft.lb122 J
Endurance Strength / N=10⁵ (min.):± 65 ksi± 455 N/mm²
Hardness Brinell: (min.):285-400 HB285-400 HB

3. MAGNETIC PROPERTIES

Relative permeability: ≤ 1,005.

4. CORROSION RESISTANCE

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 warmforging. Each collar is tested according to ASTM A 262, Pract.A and E, last edition.

Pitting Corrosion: Due to a high chromium- and nitrogen content a high resistance to pitting corrosion is given.

5. NON-DESTRUCTIVE TESTING

• Magnetic inspection: Drill collars are 100% tested by a proprietary probe-testing process using a Förster 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-Magnetic Drill Collars meet all requirements of API Spec. 7.1, last edition. All tests are carried out according to ASTM-Standards, last editions.
Prepared / released: B. Holper
Date: Sept., 2013