Cold Drawn Seamless Alloy Steel Mechanical Tubing
Precision Mechanical Tube for Automotive, Machinery, and Engineering Applications
Model: CX-11
Brand: CHENGXIN
HS Code: 730431
Product Overview
CHENGXIN Cold Drawn Seamless Mechanical Tubing is manufactured with tight tolerances, high mechanical strength, and superior surface finish, meeting the demanding requirements of modern automotive, hydraulic, and precision mechanical applications. This seamless tube product complies with international specifications including ASTM A519, BS 6323-4, and EN/DIN equivalents, and covers a wide range of carbon and alloy steel grades, making it a top choice for engineers and industrial buyers.
Product Description
Commodity: Cold Drawn Seamless Alloy Steel Mechanical Tubing
Typical Applications: Automotive axles, gears, steering components; hydraulic cylinder tubes; precision machined parts; mechanical structures under high pressure or impact; oilfield and power transmission components
Standard Specifications: ASTM A519 (U.S. standard for carbon and alloy mechanical tubing); BS 6323-4 (British standard for seamless steel tube for mechanical purposes); EN/DIN equivalents (e.g. DIN 2391, EN 10305)
Steel Grades Available:
Alloy Steel Grades: ASTM A519: 4130, 4140, 4145, 4340, 8620; BS 6323-4: CFS3–CFS11; EN/DIN: 25CrMo4, 34CrMo4, 42CrMo4
Carbon Steel Grades (Available upon request): SAE1020, SAE1026, SAE1045, ST52, E355, Q345B
Size Range: Outside Diameter (OD): up to 356 mm; Inside Diameter (ID): up to 300 mm; Wall Thickness (WT): as required (no strict limitation)
Manufacturing Process: Cold Drawn, Cold Rolled, Hydraulic Cold Drawn
Delivery Conditions: BK (as cold drawn), BKW (lightly cold worked), BKS (stress relieved), GBK (annealed), NBK (normalized), Q+T (quenched + tempered)
End Finishing: Plain ends with square cuts, beveled ends upon request, burr-free internal & external surface
Surface Protection & Marking: Internal & external anti-rust oiling, standard and custom marking available, color coding optional
Packaging: Bundled with steel straps, plastic end caps, PVC wrap or knitted bags, optional wooden crates for export
Advantages of CHENGXIN Seamless Mechanical Tubes
100% Seamless Alloy Steel Tubes: No weld zone, superior fatigue resistance
Tight Dimensional Tolerance: Ideal for CNC machining and hydraulic fitments
High Tensile Strength & Hardness: Suited for load-bearing and dynamic stress
Wide Material Availability: Carbon & alloy steel tubing from reliable sources
Comprehensive Size Options: Covering various mechanical tubing sizes with flexibility for custom OD/ID
Applications
Automotive parts such as axle tubes, shafts, and stabilizers
Engineering machinery components with high fatigue resistance
Hydraulic cylinders requiring consistent wall thickness and ID finish
Oil & gas industry (drill collars, tool joints, pump barrels)
Aerospace & defense (upon special request and tolerance)
FAQ
Q1: What is the difference between mechanical tubing and standard seamless pipe?
A: Mechanical tubing is produced with tighter tolerances, higher cleanliness, and more uniform surface finish than standard seamless pipe, designed for machining and structural applications.
Q2: What is your minimum order quantity?
A: Carbon steel grades: 3–5 tons per size; alloy steel tubing: 10–20 tons per size.
Q3: What’s your delivery time?
A: Carbon steel mechanical tubing: 20–30 days; alloy steel mechanical tubing: 30–50 days depending on material availability.
Q4: Do you offer inspection certificates?
A: Yes, MTC (EN10204 3.1/3.2), dimensional reports, and third-party inspection support are available.
Q5: Can I request custom tube processing or machining?
A: Yes, we provide custom turning, grooving, cutting, and pre-machining services based on drawings.
Company Introduction
CHANGZHOU CHENGXIN PRECISION TUBE CO., LTD. is a leading manufacturer of cold drawn seamless tubes with over 20 years of industry experience. Our 32,000㎡ factory is equipped with 2 hydraulic cold drawing benches, 4 chain drawing lines, 2 ERW welding mills, and in-house heat treatment, inspection & machining facilities. We serve clients across Europe, North America, Southeast Asia, and the Middle East, supplying high-performance mechanical steel tubing and custom OEM solutions.
Looking for a trusted supplier of seamless alloy steel tubes or mechanical tubing? Contact CHENGXIN today for free samples, technical consultation, and quick quotation.
