P750 Nonmagnetic Steel

• Customization: Available
• After-sales Service: Support
• Type: Nonmagnetic Steel Bar
• Model NO.: Nonmagnetic Steel
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Cold Drawn, Hot Rolled, Forged, Grinding, etc.
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Polished
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Certificate: ISO, ABS, BV, CCS, Dnv, Lr, Gl, Mill Certificate
• Quality Inspection: Ut, Chemical Composition, Physical Properties/SGS
• Length: Normally 6m, or Produce as Requirements
• Diameter: 4mm - 600mm
• Diameter Tolerance: H9, H11, H13, K9, K11, K13 etc
• Heat Treatment: Quenched, Tempered, Annealed
• Surface Require: Black, Bright. Peeled and Polished, Annealed
• Transport Package: Seaworthy Packing/Wooden Box or at Client's Requir
• Specification: Customized
• Trademark: OEM & ODM
• Origin: China
• HS Code: 7213910000
• Production Capacity: 1000 Ton/Month

Product Description

Product Description

 

P750 Nonmagnetic Steel

1. CHEMICAL COMPOSITION

P750 is a high pitting corrosion resistant nonmagnetic, austenitic Cr-Ni-N-steel, specifically developed for oilfield applications.

C	Mn	Cr	Mo	N	Ni
max. 0,03	1,50 - 3,00	26,50 - 29,50	2,00 - 4,00	min. 0,20	28,00 - 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:

TEXT	OD	KSI	N/MM
Yield Strength (min.) 0,2%-offset method:	OD up to 9 1/4"	140 ksi	965 N/mm²
	OD 9 1/2" and larger	130 ksi	900 N/mm²
Tensile Strength (min.):		150 ksi	1035 N/mm²
Elongation (min.):		17%	17%
Reduction of area (min.):		50%	50%
Impact energy (min.):		100 ft.lb	135 J
Endurance Strength / N=10 5 (min.):		± 80 ksi	± 550 N/mm²
Hardness Brinell: (min.):		300-400 HB	300-400 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 warm forging. Each collar is tested according to ASTM A 262, Prat.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. 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.

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