P550 Nonmagnetic Steel Bars

• Customization: Available
• Standard: AISI, ASTM, GB, JIS, DIN
• Technique: Hot Rolled
• Model NO.: KM-20250430
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Bright Finish, Hot Rolled Pickled, Polished
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Size: 10mm~300mm
• Standards: API Spec 7-1 or Sy/T5144
• Materials: P550 P530 P580, P650, P690, P750, P750
• Magnetic Permeability (ASTM a 342): Max 1.005
• Applications: Petroleum Drilling
• Package: in Bundles or Wooden Boxes
• Transport Package: 30~45 Days After Order Confirmation
• Specification: 10mm~300mm
• Trademark: Kingmetal
• Origin: Made-in-China
• HS Code: 722220000
• Production Capacity: 1000 Tons Per Month

Product Description

P550 Nonmagnetic Steel bars
 

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

Standard: API Spec 7-1 or SY/T5144
Magnetic Permeability (ASTM A 342): Max 1.005
Magnetic Field Variation: 40 gammas Max
Application: For the inspection in the process of petroleum drilling

P550 Non-Magnetic ausentic Mn Cr steel Hollow Bars Specification

Round bars: 10mm~300mm

Hollow Bars : 32 mm - 250 mm OD,Thickness : 4.0mm - 100mm

Length : Cut length, Fix length, Single Random, Double Random & Required Length

Form : Round, Square, Rectangular

End : Plain End, Beveled End, Treaded
 

P550 Non-Magnetic ausentic Mn Cr steel 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 warmforging. 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.

6. We can also offer other kinds of material:P550 P530 P580, P650, P690, P750, P750