P550 Nonmagnetic Steel Round Bar

• Customization: Available
• After-sales Service: Technical/Sample/Quality
• Warranty: Technical/Sample/Quality
• Model NO.: P550
• Type: Nonmagnetic Steel
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Rolled or Forged
• Application: Oil Field
• Surface Treatment: Polished
• Alloy: Nonmagnetic Steel
• Special Use: Oil Equipment
• Transport Package: Wooden Case
• Specification: max 1500mm diameter
• Trademark: SHUNFU
• Origin: China

Product Description

P550 Nonmagnetic Steel

We produce P550 non-mag material Steel Bars and Non Magnetic Hollow Bars.
 

1. CHEMICAL COMPOSITION

P550 is a special nonmagnetic, austenitic Mn-Cr-steel with a high nitrogen content.

C	Mn	Cr	Mo	N	Ni
max. 0,06	20,50 - 21,60	18,30 - 20,00	min. 0,50	min. 0,60	min. 1,40

 

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.):		20%	20%
Reduction of area (min.):		50%	50%
Impact energy (min.):		60 ft.lb	82 J
Endurance Strength / N=10 (min.):		± 80 ksi	± 550 N/mm²
Hardness Brinell: (min.):		335-450 HB	335-450 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 warm forging. Each collar is tested according to ASTM A 262, Prat.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. 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.