SAE 1020 Cold Drawn Seamless Tube
SAE 1020 Cold Drawn Seamless Tube
SAE 1020 Cold Drawn Seamless Tube is a precision-engineered steel tubing known for its excellent mechanical properties and smooth surface finish.SAE 1020 is a low-carbon steel grade known for its good weldability, formability, and moderate strength. When processed into a cold-drawn seamless (CDS) tube, it offers improved dimensional accuracy, a smooth surface finish, and enhanced mechanical properties compared to hot-finished tubes.
SAE 1020 cold drawn seamless tubes are widely used in industries requiring precision, durability, and reliability in moderate-strength applications.
Advantages
1. Excellent Dimensional Accuracy & Tight Tolerances: Cold drawing ensures consistent wall thickness and precise outer diameter.Ideal for applications requiring tight fit and interchangeability (e.g., hydraulic cylinders, bearings).
2. High Strength: Cold drawing work-hardens the steel, increasing tensile strength and yield strength compared to hot-rolled tubes.
3.Smooth Surface Finish:The cold drawing process produces a fine, burr-free surface, reducing friction in moving parts.
4. Corrosion Resistance: The steel composition provides moderate resistance to corrosion, especially when properly maintained.
5.Cost-Effective for Medium-Strength Applications:SAE 1020 Cold Drawn Seamless Tube is more affordable than alloy steels (e.g., 4140, 4130) while providing sufficient strength for general engineering uses.
6. Seamless Construction: The seamless nature of the tube ensures uniformity and reliability in high-pressure applications.
7. Versatility: Suitable for a wide range of applications, including hydraulic cylinders, pneumatic cylinders, and precision engineering components.
Material Composition
| Element | Composition |
|---|---|
| Carbon (C) | 0.17 – 0.23% |
| Silicon (Si) | ≤ 0.55% |
| Manganese (Mn) | 0.30 – 0.60% |
| Phosphorus (P) | ≤ 0.040% |
| Sulfur (S) | ≤ 0.050% |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength | ≥ 210 MPa |
| Tensile Strength | ≥ 345MPa |
| Elongation | ≥ 15% |
Delivery Condition: SR,BK, BK+S, GBK, NBK
ID Size : 20mm – 1500mm
Length: max 16m
Type: Seamless, Cold Drawn
Straightness: ≤ 0.5/1000
Roughness: as request
Tolerance EXT: DIN2391, EN10305, GB/T 1619,GOST 8731,GOST 1050,GOST4543
Tolerance INT: as request
Protection: Anti-rust oil on inside and outside surface, plastic caps in both ends.
Packing: Bundle with steel strip and PE sheet or Plywood case
Delivery Conditions
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and thus have a rather high resistance to deformation. |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation.Appropriate further processing allows a certain degree of cold forming(e.g.bending,expanding). |
| Cold finished and stress-relieved | BKS | Heat treatment is applied following the last cold forming process.Subject to appropriate processing conditionsthe increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
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