EN10139 DC04 Zinc Galvanized Double Wall Steel Tube 7.94mm x 0.9mm with 290MPa Tensile Strength
EN10139 DC04 double wall steel tube with dimensions 7.94mm outer diameter and 0.9mm wall thickness, featuring zinc galvanized coating for superior corrosion protection. Manufactured using the Bundywelding process with copper-coated steel strips rolled through 720 degrees and resistance brazed for maximum durability.
- Enhanced corrosion resistance with zinc galvanized coating
- Double-wall construction for superior strength and reliability
- Manufactured from low carbon steel strips with fine dimensional accuracy
- Suitable for automotive, condenser, and industrial applications
| Element | Content |
|---|---|
| Carbon (C) | 0.08% |
| Silicon (Si) | 0.03% |
| Manganese (Mn) | 0.03% |
| Phosphorus (P) | 0.02% |
| Sulfur (S) | 0.02% |
| Property | Value |
|---|---|
| Tensile Strength | 290 MPa |
| Yield Strength | 180 MPa |
| Elongation | 20% |
| Salt Spray Test | 48 hours |
| Inside Surface Cleanliness | 20 g/m² |
Supplied with slightly oiled outside surface to improve oxidation resistance. Requires storage in dry conditions away from humidity and corrosive agents.
Steel strip copper coated on both sides with ≥2µm copper layer. Welding seam area on outside surface remains uncoated due to scarfing operation.
Outside surface coated with zinc layer ≥70 g/m², providing corrosion resistance exceeding 72 hours in salt spray testing before red rust appears (UNI ISO 9227).
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