Data sheet P 750 HS

Revision 1

1. CHEMICAL COMPOSITION

„P750 HS“ is a high pitting corrosion resistant nonmagnetic, austenitic Cr-Ni-N-steel, specifi- cally developed for oilfield applications.

CMnCrMoNNi
max. 0,031,50 - 3,0026,50 - 29,502,00 - 4,00min. 0,2028,00 - 31,50

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 max. 6“175 ksi1208 N/mm²
Tensile Strength (min.):180 ksi1242 N/mm²
Elongation (min.):10%10%
Reduction of area (min.):50%50%
Impact energy (min.):80 ft.lb110 J
Endurance Strength / N=10⁵ (min.):± 80 ksi± 550 N/mm²
Hardness Brinell: (min.):300-420 HB300-420 HB

3. MAGNETIC PROPERTIES

Relative permeability: ≤ 1,001.

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-, nickel- and nitrogen contents a excellent resistance to pitting corrosion comparable to nickelbase alloys 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.

P750 HS 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