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Steel Grades: E195, E235, E355, 42CrMo4, C45E
Size Range: OD 10–325 mm, WT ≤30 mm
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.
Steel Grades: ST34.2, ST37.2, ST52.3
Size Range: OD 12–219 mm, WT ≤20 mm
Production: Drawn Over Mandrel (DOM Mechanical Tubing)
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.
Size Range: OD up to 325 mm, ID up to 300 mm
Customizable Lengths and Wall Thickness
Used for: Bushings, coupling sleeves, machinery brackets
Common Search Keywords: round mechanical tubing, round mechanical tubing sizes
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
Hydraulic cylinder barrels & piston rods
Automotive shock absorber tubes
Mechanical sleeves and transmission shafts
Frame and chassis parts
Robotic arms and precision assemblies
• Hydraulic cold drawing technology means more stability during production.
• Rich manufacturing experience of various cold drawn steel tubes.
• Extensive experience in the design of cold drawing dies.
• Availability of various steel grades including carbon and alloy steel.
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:
| Tube Type | Standard | Steel Grades |
|---|---|---|
| Seamless Tube (CDS) | ASTM A519 | SAE 1010, 1020, 1026, 1045, 1518, 1524, 4130, 4140, 4340 |
| EN 10305-1 | E195, E235, E355, C45E, 42CrMo4 | |
| DIN 2391-2 | ST35, ST45, ST52 | |
| GB/T 3639 | 10#, 20#, 45#, 27SiMn, Q345B | |
| Welded Tube (CDW/DOM) | ASTM A512/A513 | 1010, 1020, 1524 |
| EN 10305-2 | E195, E235, E275, E355 | |
| DIN 2393-2 | ST34.2, ST37.2, ST44.2, ST52.3 |
| EN 10305 Code | DIN 2391/2393 Code | Condition Description |
|---|---|---|
| +C | BK | Cold drawn (hard) |
| +LC | BKW | Cold drawn (soft) |
| +SR | BKS | Stress relieved |
| +A | GBK | Annealed |
| +N | NBK | Normalized |
| Q+T | Q+T | Quenched + Tempered |
A1: CDS (Cold Drawn Seamless) offers better mechanical strength and inner surface quality, while CDW (Cold Drawn Welded / DOM) provides cost-effective alternatives for moderate tolerance applications with excellent concentricity.
A2: Yes, we specialize in EN 10305-1 42CrMo4 honed seamless steel tube with controlled H8 tolerance and Ra ≤ 0.25μm.
A3: Absolutely. We manufacture according to customer’s specific drawing, steel grade, or tight tolerance requirement.
A4: 25–45 days depending on the selected steel grade, tube size, and order quantity.
