With the business philosophy of 'advancing with the times, developing with integrity, and serving attentively', we continue to broaden the scope of service, improve service quality, so as to provide our customers with high-quality and low-cost Conventional Boiler Welding Roller, Welding Rotator, St52 Steel Honed Tube. Our products and solutions are sold to the all over the world and are favorably appraised by clients. We firmly believe that we will do better with the broad goals and development ideas under the support of our customers and friends. We develop through multiple channels and constantly innovate in business to meet the increasing needs. We've got tightened inspection for quality of product.
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.
With effective quality and efficiency control, we produce high-quality Alloy Steel Pipe 4140, Alloy Seamless Tube 4130, ASTM A519 4340 Crmo Steel Pipes and win the trust and affirmation of customers at home and abroad. However, we still strive for improvement and maintain stable high-quality products to meet the requirements of customers. Before the establishment of our company, we had a thorough understanding of the industry in recent years and participated in the actual operation of some brands. With the growing of the company, now our products sold and served many countries around the world.
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