Data sheet P 650

Revision 3

1. CHEMICAL COMPOSITION

„P650“ is a special nonmagnetic, austenitic Mn-Cr-Mo-N-steel with a high pitting corrosion resistance, specifically developed for oilfield applications.

CMnCrMoNNi
max. 0,0619,50 - 20,5018,00 - 19,001,70 - 2,003,00 - 4,500,55 - 0,65

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“140 ksi965 N/mm²
OD 9 1/2“ and larger130 ksi900 N/mm²
Tensile Strength (min.):150 ksi1035 N/mm²
Elongation (min.):20%20%
Reduction of area (min.):50%50%
Impact energy (min.):60 ft.lb82 J
Endurance Strength / N=10⁵ (min.):60 ksi414 N/mm²
Hardness Brinell: (min.):330-430 HB330-430 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-, molybdenum- and nitrogen contents 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.

P650 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: June, 2013