Seamless Cold Drawn Precision Steel Tubes with High Dimensional Accuracy Smooth Surface Finish and Superior Mechanical Strength
Seamless Cold Drawn Precision Steel Tubes – Alloy Steel Tubes for Precision Applications
Material
These seamless cold drawn precision steel tubes are manufactured from alloy steels including AISI 1045, 4130, 4140, and additional grades such as 4340 and 8620. They are characterized by excellent dimensional accuracy, smooth surface finish, and superior mechanical strength, making them ideal for high-performance engineering applications.
Specifications
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Process: Seamless, cold drawn
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Material Grades: 1045, 4130, 4140, 4340, 8620
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Shape: Round, customized on request
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Tolerances: According to EN, ASTM, and GB standards
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Condition: Annealed, normalized, quenched & tempered, or customized
Chemical Composition
| Grade | C | Mn | Si | Cr | Mo | Ni | Others |
|---|---|---|---|---|---|---|---|
| 1045 | 0.43–0.50 | 0.60–0.90 | 0.15–0.35 | – | – | – | – |
| 4130 | 0.28–0.33 | 0.40–0.60 | 0.15–0.35 | 0.80–1.10 | 0.15–0.25 | – | – |
| 4140 | 0.38–0.43 | 0.75–1.00 | 0.15–0.35 | 0.80–1.10 | 0.15–0.25 | – | – |
| 4340 | 0.38–0.43 | 0.60–0.80 | 0.15–0.35 | 0.70–0.90 | 0.20–0.30 | 1.65–2.00 | – |
| 8620 | 0.18–0.23 | 0.70–0.90 | 0.15–0.35 | 0.40–0.60 | 0.15–0.25 | 0.40–0.70 | – |
Mechanical Properties (Typical)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 1045 | 570–700 | 310–350 | 16–20 | 170–210 |
| 4130 | 560–670 | 460–560 | 20–25 | 160–200 |
| 4140 | 655–950 | 415–655 | 12–18 | 197–255 |
| 4340 | 745–1080 | 470–850 | 10–15 | 200–280 |
| 8620 | 620–850 | 415–550 | 20–30 | 160–210 |
Key Features
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High dimensional accuracy and smooth internal/external surfaces
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Excellent toughness and fatigue resistance
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High strength-to-weight ratio
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Good machinability and weldability (grade dependent)
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Suitable for heat treatment (quenching & tempering, carburizing, etc.)
Standards
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ASTM A519 – Seamless carbon and alloy steel mechanical tubing
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EN 10305-1 – Steel tubes for precision applications, seamless cold drawn tubes
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JIS G4051 / G4105 – Alloy steel tubes for machine structural use
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GB/T 3639 – Seamless cold drawn or cold rolled precision steel tubes
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GOST 8734 – Seamless precision steel tubes
Applications
Seamless cold drawn alloy precision tubes are widely used in high-demand engineering fields:
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Automotive: Drive shafts, steering components, suspension parts
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Aerospace: Landing gear, structural tubing, hydraulic systems
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Oil & Gas: High-pressure lines, tool joints, downhole components
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Machinery: Gears, shafts, crankshafts, heavy-duty spindles
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Hydraulic Systems: Cylinder tubes, precision mechanical equipment
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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