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Data sheet N 850

Hastelloy® C-22HS®

Revision 1

1. CHEMICAL COMPOSITION

„N850“ is a special nonmagnetic, nickel chromium molybdenum alloy.

CCrMoFeCoNi
max. 0,0120,00 - 22,0015,00 - 18,00max. 2,0max. 1,0remainder

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 10“150 ksi1035 N/mm²
Tensile Strength (min.):160 ksi1104 N/mm²
Elongation (min.):15%15%
Reduction of area (min.):50%50%
Impact energy (min.):100 ft.lb135 J
Endurance Strength / N=10⁵ (min.):± 90 ksi± 620 N/mm²
Hardness Brinell: (min.):300-430 HB300-430 HB

3. MAGNETIC PROPERTIES

Relative permeability: ≤  1,005.

4. CORROSION RESISTANCE

Superior corrosion properties compared to other Ni-based alloys are given.
The material specified conforms to ANSI/NACE MR0175 / ISO 15156.
This alloy can be used in environments containing 1000 psia (7000 kPa) H2S at a chloride concentration of 180000 mg/L and any in situ pH up to 550°F (288°C). It can be used also in enviroments containing 500 psia (3500 kPa) H2S at a chloride concentration of 180000 mg/L, at any situ pH and in the presence of elemental sulfur up to 400°F (204° C)

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).

• Ultrasonic inspection: Each collar is ultrasonically inspected over 100% of the volume according to ASTM E 114, last edition as a minimum level.

N850 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: Oct., 2015