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41cr4 Black Phosphate Finish Carbon Seamless Pipe

41cr4 Black Phosphate Finish Carbon Seamless Pipe

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    41cr4 Carbon Seamless Pipe


    Black Phosphate Carbon Seamless Pipe


    41cr4 Carbon steel Pipe

  • Standard
  • Grade
    10#, 20#, 45#, ST35, St35.4, St35.8, St37, St37-2, ST37.4, St52, St52.4
  • Thickness
    0.5 - 12 Mm
  • Outer Diameter(Round)
    12 - 128 Mm
  • Application
    Mechanical Purpose
  • Technique
    Cold Drawn
  • Surface Treatment
    Black Phosphate Finish
  • Special Pipe
    Hydraulic Seamless Tube
  • Keyword
    Piston Rod
  • Place of Origin
    Zhejiang, China (Mainland)
  • Certification
    ISO 9001 TS16949 ISO 14001
  • Minimum Order Quantity
  • Price

41cr4 Black Phosphate Finish Carbon Seamless Pipe

High Grade 41cr4 Carbon Seamless Stainless Steel Pipe And Tube


1.Quick Detail:    piston rod
Black Phosphated Hydraulic Tubes with High Precision
EN10305-1, EN10305-4, DIN2391,
E235, E355, ST37.0, ST44.0, ST52.0
Steel Pipes with high precision for Hydraulic Systems Black Phosphating


Material Stainless Steel 304/304L/316L
Shape Round / Square / Rectangle
Production Standards ASTM A270, ASTM A269, ASTM A249, ASTM A778, ASTM A789, DIN 11850, EN 10357, EN 10217-7 and so on.
Outer Diameter 16mm - 2000mm ;
Thickness 0.8mm - 20 mm ;
Length 6 Meters - 18.3 Meters ; As customers' request ;
Tolerance According to the Standard , +/-10% Commonly ;
Surface Treatment 180#, 320#, 400# Satin / Hairline, Bright Anneal, Pickle,400#, 500#, 600# or 800# Mirror finish
Application Petrochemical Industry ; Chemical Fertilizer Industry ; Oil Refining Industry ; Oil And Gas Industry ; Light Industry And Food Industry ; Pulp And Paper Industry ; Energy And Environmental Industries .
Test Flaring test ; Flattening test ; Bending Test ; Hydraulic Test ; Eddy Current test
Design OEM / ODM / Customized
Certificate ISO9001 ; ISO14001; ISO 18001; TUV ;

2.Production process:
DIN series tubes, cold drawn and bright annealed precision seamless steel tube is used as the tube to be phosphated. The phosphorization is realized with the imported chemical fluid to form a black film. The antirust oil is absorbed by means of the micropore on the film to prevent the tubes from getting rust.

3.Main Features:
Bright black color is homogeneously distributed on the tube surface. The tube has good property of antirust.

4.Main Application:
Phosphated hydraulic tube is mainly used in hydraulic system.

5.Our products are widely used in:
Engineering machinery Machine tool industry Hydraulic industry Special vehicle
Automobile pipeline Heavy machinery Compressor Shipbuilding industry
Railway locomotive Diesel engine Utility boiler Injection molding machine 
Power equipment Heavy duty automobile Forging and stamping machine

6.Main Characteristics:
No Oxidation Layer on the Outer and Inner Walls
No Crack under Flaring and Flattening
No Leakage under High Pressure 
No Distortion after Cold Bending 
High Precision High Cleanness Excellent Brightness



1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness,                  Impact, Mictrostruture etc
8~ Packing and Stocking.



Q: Are you trading company or manufacturer ?

A: A professional steel pipes materials inventor, manufacturer and solution provider

Q: How long is your delivery time?

A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us