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Mpm / Pqf Mandrel Bars for Producing Seamless Steel Pipes and Tubes

China Mpm / Pqf Mandrel Bars for Producing Seamless Steel Pipes and Tubes, Find details about China Mandrel Bar, Retained Mandrel from Mpm / Pqf Mandrel Bars for Producing Seamless Steel Pipes and Tubes

Model NO.
as the drawing
Application Range
Continuous Rolling Mill,Mpm,Fqm,Pqf
Trademark
FANGLE
Transport Package
Woodern Case
Specification
max 20m, Diameter 100mm-500mm
Origin
China
Model NO.
as the drawing
Application Range
Continuous Rolling Mill,Mpm,Fqm,Pqf
Trademark
FANGLE
Transport Package
Woodern Case
Specification
max 20m, Diameter 100mm-500mm
Origin
China

Chemical composition of the steel grade. Hot work tool steel corresponding to the grade AISI H13. The range of chemical composition is as specified below:

  H13 chemical composition:   

ChemicalCMn
 		Si
 		Cr
 		Mo
 		V
 		S
 		S+P
 
Content0.30-0.38
 		≤ 0.6  
 		0.70-1.20
 		 4.50-5.50
 		1.00-1.50
 		0.80-1.20
 		0.003max
 		0.020max
 
 Details:
MaterialAISI H13, X35CrMo V51 and 4CrMoSi V1
Diameterup to 500mm
Lengthup to 20m
ThreadingAvailable,phosphotized after chromium plating
chromium platinglength: whole working body
W.th: 0.045/0.08
dehydrogenation after chromium plating
Testultrosonic test
 
1.Steel manufacturing
 
The steel shall be produced by the electric arc furnace and has to be vacuum degassed. Hydrogen must be held below 2.5 ppm and Oxygen below 30 ppm.
 
2. Hot Forming.
The mandrel bars are to be forged from an ingot. The cross-sectional area of the solid forging shall have a reduction by hot forming from that of the ingot in the ratio of not less than 8 to 1. There should not have any defects.
 
3. Heat Treatment.
The hot forming process shall be immediately followed by heat treating processes. .Material must ensure the required structure and mechanical properties.
 
4.Mandrel tests.
   4.1 Mechanical properties
   4.2 Tensile and impact tests
    Tensile strength: RM = 1050 MPa Minimum (105 kg/mm²)
                           RM = 1280 MPa Maximum (130 kg/mm²)
           Yield strength:   Ys ≥ 880 MPa
           Elongation:     Min .A=10%
           Reduction of area: Min.Z=30%
           Charpy V-Notch impact test: Min.  Kv ≥ 20j, testing at room temperature.
           Charpy tests will be in transverse orientations.
  4.3 Hardness tests
  4.4 Microscopically Examinations
  4.5 Microstructure after Heat Treatment
  4.6  Austenitic Grain Size
  4.7 Nonmetallic Inclusion Contents
  4.8 Non destructive Tests
5. Straightness
6.Machining
7.Chrome plating
8. Marking
9.Protection and Packing
10.Certification

 
Mpm / Pqf Mandrel Bars for Producing Seamless Steel Pipes and Tubes
Mpm / Pqf Mandrel Bars for Producing Seamless Steel Pipes and Tubes
 

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