BS 6323-4 CFS3 Cold Finished Seamless Steel Tubes 6-280mm OD
Product Details
cold finished seamless steel tubes
,BS 6323-4 seamless steel tubes
,CFS3 steel tubes 6-280mm OD
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
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Standard: BS 6323-4, Part 4 – cold-finished seamless tubes
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Seamless cold finishing; residual lubricant permissible unless specified
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Delivery conditions: BK (hard), BKW (soft), GBK (annealed), GZF (annealed & de-scaled), NBK (normalized), NZF (normalized & de-scaled)
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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
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C ≤ 0.20%, Si ≤ 0.35%, Mn ≤ 0.90%, P ≤ 0.050%, S ≤ 0.050% (CFS3)
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Variant CFS3Aa: Mn 0.60–1.00%, Si 0.10–0.35%
Mechanical Properties
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Tensile strength: ~480 MPa (typical)
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Elongation: ~6% (typical)
Comparable Grades Summary
| Grade | C | Si | Mn | P | S | Tensile MPa | Elongation % |
|---|---|---|---|---|---|---|---|
| CFS3 | ≤0.20 | ≤0.35 | ≤0.90 | ≤0.050 | ≤0.050 | ~480 | ~6 |
| CFS3Aa | ≤0.20 | 0.10–0.35 | 0.60–1.00 | ≤0.050 | ≤0.050 | – | – |
| CFS4 | ≤0.25 | ≤0.35 | ≤1.20 | ≤0.050 | ≤0.050 | ~410 | ~22 |
| CFS5 | ≤0.23 | ≤0.50 | ≤1.50 | ≤0.050 | ≤0.050 | – | – |
| HFS3 | ≤0.20 | ≤0.35 | ≤0.90 | ≤0.050 | ≤0.050 | – | – |
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
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Complies with BS 6323-4 and BS 6323-1
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Can be certified per EN 10204 Type 3.1/3.2
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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.
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