SAE J526 Welded Low-Carbon Steel Tubing (ERW) — Precision Steel Tube for Automotive

Material

SAE J526 tubing is electric-resistance-welded (ERW), single-wall, low-carbon steel precision tubing designed for automotive and similar industrial uses where reliable pressure performance and controlled forming (bending, beading, brazing, and double flaring) are required. The tube is formed from a single steel strip; after welding, the outside weld bead is removed to provide a smooth external surface suitable for assembly and routing in compact automotive packaging.

Note: SAE J526 material is not intended for single-flare applications because the internal weld area can create a potential leak path; if single-flare use is unavoidable, risk must be agreed between purchaser and producer.

Specifications

Main Features

• Stable dimensional accuracy for dependable fit-up with automotive tube fittings (OD/WT tolerances per SAE J526)

• Pressure-capable performance validated by standard test methods (e.g., pressure proof, flaring, bending, NDT)

• Forming-friendly low-carbon steel for bending and assembly routing

• Production-ready surface condition: outside bead removed; inside bead controlled (special internal bead requirements by agreement)

Our Advantages

1. Will it leak at the flare or fitting because it’s welded ERW?

• SAE J526 is not intended for single-flare use; we align supply to double-flare / appropriate forming methods and control internal weld bead conditions when required by the purchase order.

• Flaring performance is verified through standardized flaring procedures.

2. Can you hold tight tolerances and keep tube-to-tube consistency for mass production?

• We follow SAE J526 tolerances and implement inline dimensional checks, plus lot traceability and compliance certificates upon request.

3. How do you prevent rust and contamination inside the tube during shipping and storage?

• We provide internal cleanliness control and corrosion protection for shipment/normal storage, with optional extended coatings when specified.

Chemical Composition 

Mechanical Properties 

Applicable / Reference Standards

• SAE: SAE J526 — Welded low-carbon steel pressure tubing suitable for bending, flaring, beading, forming, and brazing

• ASTM: ASTM A513/A513M — ERW carbon/alloy steel mechanical tubing

• EN: EN 10305-3 — Welded cold-sized precision steel tubes

• GOST: GOST 10704-91 — Longitudinally welded steel tubes (electric welded)

• JIS: JIS G3445 — Carbon steel tubes for machine structural purposes

• GB: GB/T 3091 — Welded steel pipes for low pressure fluid delivery

Application Areas

Primary industries

• Automotive fluid systems, refrigeration tubing, general hydraulic and light pressure service

Where it is used

• Automotive: hydraulic lines (non-severe forming), routed steel tube assemblies, brackets/formed tube parts, brazed tube components

• Refrigeration: general-purpose steel tube circuits and structural tube elements

• Hydraulics / general engineering: low-carbon pressure tube runs where J526 performance tests and tolerances are required

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.