close
Choose Your Site
Global
Social Media
1. EN 10305-1 Cold Drawn Seamless Precision Tubes
Steel Grades: E195, E235, E355, 42CrMo4, C45E
Size Range: OD 10–325 mm, WT ≤30 mm
Delivery Conditions: +C, +LC, +SR, +A, +N, Q+T
Applications: Pneumatic & hydraulic cylinders, shock absorbers, structural components
Highlight: We are a professional EN 10305-1 42CrMo4 honed seamless steel tube factory with high precision bore finishing for hydraulic cylinders.
2. DIN 2393-2 Cold Drawn Welded Tubes (ERW/CDW)
Steel Grades: ST34.2, ST37.2, ST52.3
Size Range: OD 12–219 mm, WT ≤20 mm
Production: Drawn Over Mandrel (DOM)
Application: Automotive components, frame structures, mechanical parts
Highlight: Our cold drawn ERW tube products meet the DIN 2393-2 standard with excellent ovality and straightness control.
3. Round Mechanical Tubing (Custom Sizes Available)
Size Range: OD up to 325 mm, ID up to 300 mm
Customizable Lengths and Wall Thickness
Delivery: BK, BKW, BKS, GBK, NBK, Q+T
Used for: Bushings, coupling sleeves, machinery brackets
Common Search Keywords: round mechanical tubing, round mechanical tubing sizes
Typical Steel Grades Available
Carbon Steel: SAE 1010, 1020, 1026, 1045, 1518, 1524, 1541
Alloy Steel: SAE 4130, 4140, 4145, 4340, 8620, 42CrMo4
EN/DIN: E235, E355, ST52.3, ST37.2, ST34.2, C45E, 25CrMo4, 34CrMo4
Applications
Hydraulic cylinder barrels & piston rods
Automotive shock absorber tubes
Mechanical sleeves and transmission shafts
Frame and chassis parts
Robotic arms and precision assemblies
Why Choose Chengxin Precision Tubes?
Over 20 years of experience in cold drawing and ERW precision tube manufacturing
In-house tooling design for high-accuracy drawing dies
Multiple standards supported (EN 10305, DIN 2393, ASTM A519)
Custom round mechanical tubing sizes available upon request
Advanced bore treatment including honing, skiving & roller burnishing
Our Advantages:
• Hydraulic cold drawing technology means more stability during production.
• Rich manufacturing experience of various cold drawn steel tubes.
• Extensive experience about design of cold drawing dies.
• Availability of various steel grades including carbon steel and alloy steel grades.
Parameters of precision tube or mechanical tube we manufacture:
1. Type: Seamless(CDS), Welded(DOM/CDW)
2. Size range: 10mm(OD)*1mm(W.T)-325mm(OD)*35mm(W.T), including imperial sizes.
3. Typical steel grades: various carbon steel and alloy steel:
Seamless Tube(CDS) | ASTM A519: | SAE 1010, 1020, 1026, 1045, 1518, 1524, 1541, 4130, 4140, 4145, 4340 |
EN 10305-1: | E195, E235, E355, C45E, 42CrMo4 | |
DIN 2391-2: | ST35, ST45, ST52 | |
GB/T 3639: | 10#, 20#, 45#, 45#, 27SiMn, Q345B, | |
Welded Tube (CDW Tube) | ASTM A512/A513: | 1010,1020,1524 |
EN 10305-2: | E195, E235, E275, E355 | |
DIN 2393-2: | ST34.2, ST37.2, ST44.2, ST52.3 |
4. Delivery Condition:
+C | +LC | +SR | +A | +N | Q+T |
BK | BKW | BKS | GBK | NBK | Q+T |
Cold drawn(hard) | Cold drawn(Soft) | Stress relieved | Annealed | Normalized | Quenched+Tempered |
| Precision Tube | Mechanical Tube | |
 |  |
| Cold Drawn Welded Tube | Cold Rolled Steel Tube | |
 |  |
Frequently Asked Questions
Q1: What is the difference between CDS and CDW tubes?
A1: CDS (Cold Drawn Seamless) offers better mechanical strength and inner surface quality, while CDW (Cold Drawn Welded) provides cost-effective alternatives for moderate tolerance applications.
Q2: Can you supply 42CrMo4 honed tubes for hydraulic cylinders?
A2: Yes, we specialize in EN 10305-1 42CrMo4 honed seamless steel tube with controlled H8 tolerance and Ra ≤ 0.25μm.
Q3: Do you support custom round mechanical tubing sizes?
A3: Absolutely. We manufacture according to customer’s drawing or tolerance requirement.
Q4: What’s your typical lead time?
A4: 25–45 days depending on grade and size.
