Precision Carbon Steel Tube - Tight Tolerance Supply

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

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Technical Specifications of Precision Carbon Steel Tube

Property	Parameter	Description
Product Name	Precision Carbon Steel Tube	Cold-drawn seamless tube with tight dimensional tolerances
Material Grade	E235 / E355 / SAE 1020 / SAE 1045 / St52	Common precision tube grade equivalents
Standard Compliance	EN 10305-1, ASTM A519, DIN 2391, ISO 8535	Meets major international precision tube standards
Manufacturing Process	Cold Drawn Seamless (CDS)	Ensures superior surface finish and dimensional accuracy
Carbon (C)	0.17-0.50%	Varies by grade, provides strength
Manganese (Mn)	0.40-1.60%	Improves hardenability and tensile strength
Phosphorus (P)	≤0.025%	Controlled for improved ductility
Sulfur (S)	≤0.025%	Low sulfur for better machinability and weldability
Silicon (Si)	≤0.40%	Deoxidizer, enhances strength
Tensile Strength	340-800 MPa	Depends on grade and heat treatment condition
Yield Strength	215-580 MPa	Minimum yield per applicable standard
Elongation	≥10-25%	Ductility varies by grade and wall thickness
OD Range	4mm - 120mm	Tight OD tolerance ±0.05mm to ±0.15mm
Wall Thickness	0.5mm - 20mm	Wall tolerance ±0.05mm to ±0.10mm
Length	Up to 12m or custom cut	Fixed, random, or precision cut lengths
Surface Finish	Bright annealed, phosphated, oiled, chrome plated	Multiple surface treatment options available
Application	Hydraulic systems, automotive, pneumatic cylinders, machinery	Ideal for high-precision mechanical and fluid power applications
Certification	EN 10204 3.1, ISO 9001, IATF 16949	Quality certifications provided with shipment
MOQ	1 ton	Minimum order quantity for standard sizes

Precision Carbon Steel Tube - Tight Tolerance Supply

Precision carbon steel tube is a cold-drawn or cold-rolled seamless tubular product engineered to meet exceptionally tight dimensional tolerances, superior surface finish, and consistent mechanical properties. Manufactured in accordance with standards such as EN 10305 and ASTM A519, these tubes serve critical roles in automotive systems, hydraulic cylinders, mechanical engineering, and instrumentation where dimensional accuracy is non-negotiable. As a mill-direct supplier, we deliver premium grade precision carbon steel tubing with tolerances as tight as ±0.05 mm on outer diameter and wall thickness, ensuring reliable performance across demanding industrial applications.

Precision carbon steel tube supplier

What Is Precision Carbon Steel Tube?

A precision carbon steel tube is a cold-finished steel tube produced through cold drawing or cold pilgering processes that yield exact dimensional control, smooth inner and outer surfaces, and enhanced mechanical strength compared to hot-rolled alternatives. Typical carbon content ranges from 0.10% to 0.45% depending on the grade, with common designations including E235 (St 37.4), E355 (St 52), SAE 1020, and SAE 1045.

Precision Carbon Steel Tube Technical Specifications

Our precision carbon steel tubing is produced to the following parameters, verified through in-house testing and third-party inspection:

Precision carbon steel tube wholesale

Property	Specification
Standards	EN 10305-1/2/4, ASTM A519, DIN 2391, SAE J524
Outer Diameter Range	6 mm – 120 mm (±0.05 mm tolerance available)
Wall Thickness	0.5 mm – 15 mm (±0.10 mm typical)
Length	Up to 12,000 mm, cut-to-length available
Surface Finish	Ra ≤ 0.8 μm (honed/ID polished options)
Tensile Strength (E355)	580–780 MPa per EN 10305-1
Yield Strength (E355)	≥ 355 MPa minimum
Elongation (E355)	≥ 6% (on gauge length 5×d₀)

Key Applications for Precision Carbon Steel Tubing

Hydraulic and Pneumatic Cylinders: Honed ID tubes with Ra ≤ 0.4 μm for piston and rod cylinder assemblies
Automotive Components: Steering columns, shock absorber bodies, fuel injection lines, and drive shafts
Mechanical Engineering: Bearing bushings, roller shafts, and machine tool components requiring interference-fit assembly
Instrumentation: Pressure gauge tubing and sensor housings where exact bore dimensions are essential

Why Choose Our Precision Tube Supply

Every precision carbon steel tube we ship undergoes 100% non-destructive testing including eddy current and ultrasonic inspection per EN 10246-7. We maintain ISO 9001:2015 and IATF 16949 certified production lines, with full material traceability from billet to finished tube. Our cold-drawing facility operates multi-pass reduction schedules that achieve dimensional consistency within ±0.025 mm on critical orders, supported by in-house metallographic and mechanical testing laboratories.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Standard MOQ is 500 kg per size and grade. For project-based requirements or trial orders, we accommodate quantities as low as 200 kg subject to stock availability.

Do you provide material test certificates?

Yes. Every shipment includes EN 10204 Type 3.1 mill test certificates covering chemical composition, mechanical properties, dimensional inspection results, and NDT records.

What is the typical delivery time?

Stock items ship within 5–7 business days. Custom-drawn precision carbon steel tube orders typically require 3–5 weeks depending on size, quantity, and finishing requirements.

Precision carbon steel tube China

Can you cut to custom sizes?

Absolutely. We offer precision saw-cutting and laser-cutting services with length tolerances of ±0.5 mm, deburring, and end-chamfering to customer specifications.

Get a Competitive Quote for Precision Carbon Steel Tube

Ready to source tight-tolerance precision carbon steel tubing at factory-competitive pricing? Contact our technical sales team with your dimensional requirements, grade preference, and target quantity. We respond to quote requests within 24 hours and provide comprehensive technical support from material selection through delivery.

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

2025-02-19

Acceptable Quality with Delivery Delay Resolved
Ordered 2 tons of E355 tube, 70mm OD × 4mm wall. Material quality met EN 10305-1 spec and certificates were complete. Initial shipment was delayed by 10 days due to production scheduling, but their sales team communicated proactively and arranged partial air freight at no extra cost. Final product performed well in our hydraulic project.

William Taylor

Australia

verified purchases

2025-03-14

Reliable E235 Precision Tubes for Sensor Housings
Bought 800 kg of E235 precision tube, 16mm OD × 1.5mm wall for pressure sensor housings. Bore dimensions were consistent — critical for our sealing requirements. Packaging could be slightly better for long-distance ocean freight, a few tubes had minor surface marks from transit. Nothing that affected functionality. Good price-to-quality ratio overall.

Carlos Silva

Brazil

verified purchases

2025-04-04

Good Value SAE 1045 Tubes for Machine Components
Ordered 6 tons of SAE 1045 precision tube, 45mm OD × 10mm wall for bearing bushing blanks. Compared quotes from 5 suppliers — pricing was competitive with solid quality. Wall thickness measured ±0.08 mm which is within spec but not as tight as their premium offering. Adequate for our machining application. Would order again for cost-sensitive projects.

Robert Brown

United Kingdom

verified purchases

2025-04-23

Perfect Repeat Order for Pneumatic Cylinder Tubes
Second order — 5 tons of E355 honed tube, 80mm OD × 6mm wall, ID polished to Ra 0.35 μm for pneumatic cylinder barrels. Quality matched our first batch perfectly. Compared to our previous European supplier, lead time improved by nearly two weeks. Full traceability from billet to finished tube confirmed on the 3.1 cert.

Wei Chen

Singapore

verified purchases

2025-05-20

Excellent Service on Custom-Length Precision Tubes
Needed 1.8 tons of EN 10305-1 E235 precision tube, 25mm OD × 2mm wall, cut to 14 different lengths for instrumentation housings. They managed all custom cutting with deburring included, shipped in clearly labeled bundles. Documentation was thorough — chemical composition, mechanical properties, and UT inspection all covered. Delivered to Singapore in 25 days.

Hans Mueller

Germany

verified purchases

2025-06-11

Premium E355 Tubes Meeting DIN 2391 Standards
Purchased 4.2 tons of DIN 2391 precision seamless tube in E355, 50mm OD × 8mm wall for roller shaft applications. Tensile test results on the mill cert showed 625 MPa, well within spec. Surface finish measured Ra 0.6 μm on our profilometer. This is our 4th order in 14 months — dimensional repeatability batch to batch has been reliable.

Michael Johnson

United States

verified purchases

2025-07-03

Outstanding SAE 1020 Tubing for Steering Columns
We sourced 2.5 tons of SAE 1020 cold-drawn precision tube, 38mm OD × 3mm wall, cut to 680mm lengths for steering column production. Length tolerance held at ±0.4 mm with clean chamfered ends. Their technical team helped us select the right grade and temper. Response to our RFQ came within 12 hours. Smooth procurement process overall.

James Wilson

United Kingdom

verified purchases

2025-07-18

Superior Precision Tubes for Hydraulic Cylinders
Ordered 3 tons of E355 precision tube, 63mm OD × 5mm wall, honed ID to Ra 0.3 μm for hydraulic cylinder assemblies. Dimensional check showed OD tolerance within ±0.03 mm across all pieces. EN 10204 3.1 certificates provided with full NDT records. Delivered in 18 days. Excellent consistency for interference-fit piston assemblies.