Along with the 'Client-Oriented' enterprise philosophy, a rigorous high-quality control process, superior production products along with a robust R&D group, we constantly deliver premium quality products, exceptional solutions and aggressive costs for Chrome Plated Telescopic Cylinder Barrel, ASTM A519 4140 tubing, Hard Chrome Plated Honed Tube. We will use rich experience and strict management to cooperate with the company's advanced production equipment. Our company adheres to the business philosophy of 'integrity first, quality first, first-class service', to build a high-quality brand. 'Pursue excellence and innovate for you!' We hope to create brilliance with you sincerely with technology and service. The internal management of our enterprise is scientific and the quality requirements meet the export standards. Our company is sincere and has a good reputation, which is trusted by domestic and foreign merchants.
1. Introduction
4140 seamless cold drawn tube is a new high technology energy-saving product, application of high precision cold drawn precision steel tube to save steel, improve the processing efficiency and save energy High precision cold drawn pipe refers to the inner and outer diameter size accuracy (tolerances) strictly, both inside and outside surface roughness, roundness, straight degree good, fine uniform wall thickness The technology of high precision cold drawn pipe production by the main technical indicators have reached or part of a national standard GB8713 -- more than 88 international standard ISO4394 / I - 1980 (E).
2. Product Details
Application: Used for drilling, down hole motor stator tubes.
Size : ID from 70mm to 250mm
Length : Depends on customer requirement.
Material : 4140
Delivery Condition: Cold drawn / Q+T
ID and OD Tolerance : Depends on customer requirement.
Brand : Hengtong
3. Size List
72*90 | 75*95 | 76*98 | 86*105 | 86*110 | 95*120 |
95*127 | 106*136 | 127*161 | 127*165 | 134*172 | 139.7*177.8 |
140*172 | 147*185 | 158.75*209.55 | 159*197 | 165*203 | 172*210 |
172*228 | 200*245 | 235*288 | 203*120 | 172*103 | 197*120 |
165*106 |
4. Experience and Markets
Our factory has more than 20years working experiences on researching and selling. Products are well sailed all over the world, got many compliments from customers.

5. Our Services
Pre-Sale Services:
1. Providing professional technical support.
2. Send the product catalog and instruction manual.
3. If you have any question PLS contact us online or send us email, we promise we will give you a reply at the first time!
4. Personal call or visit are warmly welcome.
Sale of Services:
1. We promise honest and fair, it's our pleasure to serve you as your purchasing consultant.
2. We guarantee punctuality, quality and quantities strictly implement the terms of contract.
After-Sales Service:
1. Where to buy our products for one year warranty and life long maintenance.
2. 24-hour telephone service.
3. A large stock of components and parts, easily-worn parts.
Our goal is to only make high-quality Cold Drawn Seamless Pipe A519 Grade 4140 Automobile Tube and provide customers with professional solutions. All the staff of our company welcome friends both at home and abroad to come for visits and business on the basis of equality and mutual benefit. We can provide enterprises with fast and high-quality technical services and support.
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