Precision Steel Tube Manufacturer - Custom Sizes

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

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Technical Specifications of Precision Steel Tube

Property	Parameter	Description
Product Name	Precision Steel Tube	Cold-drawn or cold-rolled seamless tube with tight tolerances
Material Grade	E235 / E355 / ST52 / AISI 1020 / AISI 1045	Multiple carbon steel grades available
Standard Compliance	EN 10305-1, DIN 2391, ASTM A519, ISO 8535	Meets major international precision tube standards
Manufacturing Process	Cold Drawn / Cold Rolled / Honed	Precision cold finishing for superior dimensional accuracy
Carbon (C)	0.10 - 0.50%	Varies by grade, controls strength and hardness
Manganese (Mn)	0.40 - 1.60%	Enhances strength and hardenability
Silicon (Si)	≤0.40%	Deoxidizer for improved steel quality
Phosphorus (P)	≤0.025%	Strictly controlled for ductility
Sulfur (S)	≤0.025%	Low sulfur ensures machinability and weldability
Tensile Strength	340 - 780 MPa	Depends on material grade and heat treatment
Yield Strength	215 - 580 MPa	Minimum yield per applicable standard
Elongation	≥10 - 30%	Ductility varies by grade and wall thickness
OD Range	4mm - 180mm	Outer diameter tolerance up to ±0.05mm
Wall Thickness	0.5mm - 25mm	Wall tolerance up to ±0.05mm
Surface Finish	Ra ≤0.4μm (honed) / Ra ≤1.6μm (cold drawn)	Bright, smooth inner and outer surfaces
Length	Up to 12m or custom cut	Fixed, random, or precision cut lengths
Application	Hydraulic cylinders, automotive, pneumatic systems, machinery	High-precision industrial applications
Certification	EN 10204 3.1, ISO 9001, IATF 16949	Quality certifications for global supply
MOQ	1 ton	Minimum order quantity for standard sizes

Precision Steel Tube Manufacturer - Custom Sizes

As a dedicated precision steel tube manufacturer, we supply tight-tolerance seamless and welded tubing engineered for demanding industrial applications. Our production facility delivers tubes with dimensional accuracy down to ±0.05 mm, serving automotive, hydraulic, instrumentation, and mechanical engineering sectors worldwide. Every tube undergoes rigorous quality inspection to meet exact project specifications, offering buyers factory-direct access to premium-grade precision tubing at value-driven pricing.

What Is a Precision Steel Tube?

A precision steel tube is a cold-drawn or cold-rolled tubular product manufactured to exceptionally tight dimensional tolerances, superior surface finish, and consistent mechanical properties. Unlike standard structural tubing, precision tubes conform to standards such as EN 10305-1:2016 for cold-drawn seamless tubes or ASTM A519 for mechanical tubing, achieving outer diameter tolerances as fine as ±0.05 mm and wall thickness control within ±5%.

Precision Steel Tube Technical Specifications

Our precision steel tubes are produced in a broad range of grades and dimensions to accommodate diverse engineering requirements:

Precision steel tube manufacturer China

Parameter	Range / Value
Outside Diameter (OD)	6 mm – 180 mm
Wall Thickness	0.5 mm – 20 mm
OD Tolerance	±0.05 mm to ±0.15 mm (per EN 10305-1)
Surface Roughness (Ra)	≤ 0.8 µm (bright annealed finish)
Steel Grades	E235, E355, 20#, 45#, SAE 1020, SAE 1045, 4130, 4140
Tensile Strength	390 MPa – 750 MPa (grade-dependent)
Length	Up to 12,000 mm or cut-to-length
Standards	EN 10305-1/2/4, ASTM A519, DIN 2391, JIS G3441

Why Choose Our Precision Tube Manufacturing

Advanced cold-drawing lines — Multi-pass drawing with in-line gauging ensures repeatable dimensional accuracy across every production run.
Full material traceability — Each lot ships with EN 10204 3.1 mill test certificates covering chemical composition, tensile properties, and hardness values.
Flexible processing — We offer bright annealing, phosphating, honing, and precision cutting to deliver ready-to-install components.
ISO 9001:2015 certified — Our quality management system covers raw material intake through final dispatch.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ starts at 500 kg per size and grade combination. For specialty alloys such as 4130 or 4140, we accept orders from 1,000 kg to optimize heat-lot consistency.

Precision steel tube wholesale supplier

Do you provide material test certificates?

Yes. Every shipment includes EN 10204 Type 3.1 inspection certificates detailing chemical analysis, mechanical test results, and dimensional verification data.

What is the typical delivery time?

Stock dimensions in common grades like E235 and SAE 1020 ship within 7–10 business days. Custom-drawn precision steel tubes typically require 25–35 days depending on quantity and finishing requirements.

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Can you produce custom sizes and tolerances?

Absolutely. Our engineering team works with buyers to develop custom OD/ID combinations, non-standard wall thicknesses, and tighter-than-catalog tolerances for specialized hydraulic cylinder, automotive driveshaft, and instrumentation applications.

Get a Competitive Quote for Precision Steel Tubes

Ready to source precision tubing directly from the manufacturer? Share your drawings, target dimensions, steel grade, and annual volume, and our technical sales team will deliver a detailed quotation within 24 hours. Contact us today to discuss your precision steel tube requirements and discover factory-competitive pricing with reliable lead times.

Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Ahmed Al-Hassan

UAE

verified purchases

2025-02-15

Acceptable Quality — Packaging Issue Resolved
Ordered 2 tons of 20# precision tubes, 30mm OD × 4mm wall, for instrumentation fittings. Tube dimensions and certificates were fine. However, some bundles arrived with damaged end caps due to inadequate packing, causing minor dents on tube ends. Reported the issue and they credited us for affected pieces within a week. Product itself meets spec but packaging needs improvement.

William Taylor

Australia

verified purchases

2025-03-19

Reliable 4140 Precision Tubes — Decent Lead Time
We needed 1.5 tons of 4140 precision tubes, 45mm OD × 6mm wall, for high-strength marine actuator shafts. Material certs showed chemistry and hardness values right on target. OD tolerance was ±0.10mm — acceptable for our application. Lead time was 35 days, which pushed close to our project deadline. Wish it had been a few days faster, but the product quality justified the wait.

Carlos Silva

Brazil

verified purchases

2025-04-10

Good Value E355 Tubes for Mechanical Engineering
Ordered 6 tons of E355 precision tubes, 80mm OD × 12mm wall, for heavy mechanical components. Pricing was roughly 8% lower than European mills for equivalent EN 10305-1 quality. Minor surface marks on a few pieces in one bundle, but nothing that affected machining. Overall good value for the tolerance level delivered. Would order again for cost-sensitive projects.

Robert Brown

United Kingdom

verified purchases

2025-04-24

Perfect Repeat Order — SAE 1020 Precision Tubes
This is our 4th order in 18 months. Took 4 tons of SAE 1020 cold-drawn tubes, 60mm OD × 10mm wall, for mechanical assemblies. Quality has been consistent every single time — OD tolerance holds at ±0.08mm, surface finish around Ra 0.7µm. Their ISO 9001 system clearly works. EN 10204 3.1 certificates always arrive with the shipment, no chasing needed.

Wei Chen

Singapore

verified purchases

2025-05-15

Premium 4130 Precision Tubing for Automotive Application
We placed a 1.2-ton order of 4130 precision tubes, 25mm OD × 3mm wall, for automotive driveshaft prototyping. Tensile strength tested at 685 MPa — within spec. The bright annealed surface finish was clean enough to go straight into assembly without additional processing. Compared quotes from 4 suppliers and this factory offered the best combination of price, tolerance control, and lead time at 32 days.

Hans Mueller

Germany

verified purchases

2025-06-07

Excellent E235 Tubes — DIN 2391 Compliant
Purchased 5 tons of E235 seamless precision tubes per DIN 2391, multiple sizes from 12mm to 40mm OD for instrumentation lines in our packaging machinery. Dimensional checks on our CMM confirmed ±0.05mm OD tolerance consistently. Phosphate coating was uniform. Delivery took 28 days for custom lengths, which was within the promised window. Documentation was complete and well-organized.

James Wilson

United Kingdom

verified purchases

2025-06-29

Superior Dimensional Accuracy on SAE 1045 Tubing
We sourced 2.5 tons of SAE 1045 precision tubes, 38mm OD × 8mm wall, cut to 800mm lengths for CNC-machined mechanical components. Wall thickness variation was within ±4%, tighter than the ±5% they quoted. Every piece came with full traceability back to the heat lot. Response from their technical sales team was under 12 hours with a detailed quote. Solid supplier for tight-tolerance work.

Michael Johnson

United States

verified purchases

2025-07-14

Outstanding Precision Tubes for Hydraulic Cylinders
Ordered 3 tons of E355 cold-drawn seamless tubes, 50mm OD × 5mm wall, for hydraulic cylinder barrels. OD tolerance measured at ±0.06mm across the entire batch — right in line with EN 10305-1. Surface roughness came in at Ra 0.6µm after bright annealing, which saved us a honing step. EN 10204 3.1 certs were thorough. Delivered in 9 days. Already planning next quarter's order.