Precision Steel Tubes Manufactured in China Meet The Worldwide Standard Specification Chassis Suspension Dom Tubing

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Product Description

Basic Info Overview

Specification Item Details
Model NO.JIS EN ASTM DIN GB GOST ISO
TypeSeamless or Welded
TechniqueCold Drawn or Cold Rolled
MaterialCarbon and Alloy
Surface TreatmentOiled
UsageHydraulic/Automobile Pipe, Machinery Industry, Construction, Special Purpose
Section ShapeRound
IATF16949Yes
OD15-75mm
Length5-5.8 Meter
HS Code7304319000
Production Capacity50000 Ton/Year

Product Description

Precision Steel Tubes

Precision Steel Tube

A precision steel tube is a hollow steel cylinder manufactured with high dimensional accuracy, tight tolerances, and excellent surface quality, typically through processes like cold drawing or cold rolling. These tubes are critical for exact fit and high performance in hydraulic systems, automotive engineering, and aerospace applications.

Common Types of Precision Tubes

  • Seamless tubes: Created by extruding solid steel billets for a structure with no welded seams.
  • Drawn-over-mandrel (DOM): Welded tubes cold-worked over a mandrel for closer tolerances.
  • Cold-drawn tubes: Mechanically processed at room temperature for superior strength and finish.
  • Alloy tubing: Specialized grades like 4140 for high-demand structural needs.
Precision Seamless Steel tube Precision Welded Steel Tube Precision Shaped Tube
ASTM A519 / EN10305-1 / DIN 2391 / GOST 8734 EN10305-2 / ASTM A513 Type 5 / GOST 10704 EN10305-5 / ASTM A513 / DIN 2395
Seamless Tube
Welded Tube
Shaped Tube

Seamless & Welded Specifications

Seamless Steel Tube Details

Precision seamless tubes provide uniform strength and high-pressure resistance. They are essential for hydraulic cylinders and fuel injection systems where reliability under stress is paramount.

Welded Steel Tube Details

Welded precision tubes (DOM) offer minimal eccentricity and tight tolerances (0.015mm - 0.02mm), widely utilized in steering columns and suspension components.

Custom Shaped Tubes

Special Shaped Tubes

Available in square, rectangular, or oval profiles. These are used in aerospace, medical devices, and chemical processing for their lightweight yet high-strength properties.

Product Parameters

Tube Type / Standard Wall Thickness Steel Grade
Welded: ASTM A513 / EN 10305-2 1.5-6mm (0.06-0.23 in) 1010, 1020, 4130, 4140, E235, E355
Seamless: ASTM A519 / EN10305-1 1-14mm (0.039-0.55 in) 1020, 1040, 1340, 4140, E275, E355

Dimensional Tolerances

Outer Diameter Range Standard Tolerance Special Tolerance
4mm - 20mm±0.08 mm±0.05 mm
20mm - 30mm±0.08 mm±0.08 mm
31mm - 40mm±0.15 mm±0.10 mm
41mm - 60mm±0.20 mm±0.15 mm

Our Processing Advantages

Machining Services

We provide comprehensive one-stop services for subsequent processing, including tube cutting, honing, and precision machining.

Honing Service
Honed Tube
Finished Pipe

Custom Machining Services

Machined Parts
Tubular Products

Technical Capabilities

Process 1 Process 2 Process 3 Facility Overview

Frequently Asked Questions

Q1: Are you a manufacturer or a trading company? A: We are a professional manufacturer of steel pipes with extensive technical expertise in foreign trade. We offer competitive pricing and specialized after-sales service.
Q2: Do you provide free samples? A: Yes, we provide samples for free. However, the freight cost is covered by the customer, which is later credited back upon successful cooperation.
Q3: How do you guarantee delivery times? A: Timely delivery and high quality are our core tenets. We commit to the agreed schedules regardless of market price fluctuations.
Q4: What certifications do your steel products hold? A: Our products are certified under ISO9000, IATF16949, and ISO 14001, ensuring high quality and adherence to international standards.
Q5: How can I receive a prompt quotation? A: Please provide your specific requirements including steel grade, size, quantity, and destination port. We monitor all communication channels 24/7 to respond quickly.
Q6: What are your accepted payment terms? A: We typically accept T/T (30% advance, balance against B/L) or 100% Irrevocable L/C at sight.

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