Heavy Wall Carbon Steel Cold Drawn Seamless Tube for Mechanical Equipment
1. Material
This product is heavy-wall, cold-drawn, seamless tubing crafted from carbon steel (typically ASTM A519 1018/1026 or SAE 1541), delivering superior dimensional tolerance, surface finish, and strength—ideal for demanding mechanical applications. Cold drawing enhances physical properties versus hot-finished tubing.
2. Specifications
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Shape: Round seamless tube
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Wall Type: Heavy-wall
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Process: Cold drawing (from hot-rolled billet)
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Typical Sizes: OD 0.25" to 10" (6 mm to 254 mm); Wall thickness 0.035" to 1.5" (0.89 mm to 38 mm)
3. Chemical Composition
| Grade / Standard | C (%) | Mn (%) | P (max) (%) | S (max) (%) |
|---|---|---|---|---|
| ASTM A519 low-carbon (e.g., 1018) | 0.15–0.20 | 0.60–0.90 | 0.040 | 0.050 |
| ASTM A519 low-carbon (1026) | 0.22–0.28 | 0.60–0.90 | 0.040 | 0.050 |
| SAE 1541 (ASTM A519) | 0.36–0.44 | 1.10–1.40 | ≤ 0.04 | ≤ 0.05 |
| DIN ST52 (cold-drawn, DIN 2391) | 0.22 | 0.55 | — | — |
| A179 low-temp tube (ASTM A179) | (not specified) | (contains C, Mn, P, S) | – | – |
4. Mechanical Properties
| Grade / Standard | Tensile Strength | Yield Strength | Elongation (%) | Hardness |
|---|---|---|---|---|
| SAE 1541 (ASTM A519) | ≥ 650 MPa | ≥ 585 MPa | ≥ 10% | ≤ 200 HB |
| CDS 1018/1026 (approx.) | Higher than hot finish, exact values depend on process | — | — | — |
| General CDS mechanical | Enhanced strength (no exact numbers provided) | — | — | — |
| Cold-drawn 41xx family (e.g. 4130) | ~85-100 ksi (~585-690 MPa) | ~70-85 ksi (~485-585 MPa) | ~20–30% | Rockwell B 90–100 |
| A179 hydraulic tubing (soft-annealed) | Tensile based on ASME B31.3; e.g., ~340 MPa | — | — | ≤ 72 HRB / 130 HV |
5. Key Features
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Excellent dimensional accuracy and tight OD/ID tolerances
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Superior surface finish and uniform microstructure
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Increased strength and machinability compared to hot-rolled tubing
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High strength-to-weight ratio, reducing machining time and improving efficiency
6. Applicable Standards
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ASTM A519 – Mechanical seamless tubing (cold-drawn or hot finish) for grades like 1018, 1026, etc.
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ASTM A179 – Cold-drawn low-carbon steel tubes for heat exchangers and condensers
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ASTM A512 – Cold-drawn buttweld mechanical tubing up to 3½″ OD
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DIN 2391 – Cold-drawn seamless steel pipe (e.g., ST52 grade)
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SAE/ASTM – For 41xx family alloyed steels (like 4130) used under ASTM A519 when enhanced toughness/heat treatment is needed
7. Application Areas
General Field: Mechanical equipment—bushings, bearings, spacers, hydraulic cylinders, structural components.
Use Cases within Field:
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Bushings and spacers in automotive, aerospace, and heavy machinery
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Bearings/hydraulic cylinder parts requiring high precision
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Heavy-wall structural supports in construction, agriculture, and drilling equipment
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Heat exchanger tubing (ASTM A179) in boilers, condensers, and pressurized systems
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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