BS 6323-4 CFS3 Cold Finished Seamless Steel Tubes For Automotive Industry

Material
Carbon steel cold-finished seamless tubes, manufactured according to the BS 6323-4 standard (Part 4), specifically for automotive, mechanical, and general engineering uses.

Specifications

• Standard: BS 6323-4, Part 4 – cold-finished seamless tubes

• Seamless cold finishing; residual lubricant permissible unless specified

• Delivery conditions: BK (hard), BKW (soft), GBK (annealed), GZF (annealed & de-scaled), NBK (normalized), NZF (normalized & de-scaled)

• Typical size range: OD up to ~230 mm (per standard); supplier production range: 6–280 mm OD, 1–30 mm wall, up to 12 m length

Chemical Composition

• C ≤ 0.20%, Si ≤ 0.35%, Mn ≤ 0.90%, P ≤ 0.050%, S ≤ 0.050% (CFS3)

• Variant CFS3Aa: Mn 0.60–1.00%, Si 0.10–0.35%

Mechanical Properties

• Tensile strength: ~480 MPa (typical)

• Elongation: ~6% (typical)

Comparable Grades Summary

Key Features
High precision and tight tolerances from cold drawing; good mechanical strength; corrosion-resistant options with surface treatments; multiple finishing options like phosphate, galvanizing, or varnish.

Standards & Certifications

• Complies with BS 6323-4 and BS 6323-1

• Can be certified per EN 10204 Type 3.1/3.2

• Additional compliance (IBR, NACE, HIC) available

Applications
General automotive components, mechanical and general engineering parts. In automotive uses: fuel and CNG lines, structural shafts, absorber parts, and other precision mechanical elements.

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.