Cold Drawn Stainless Steel Round Pipe ASTM A269 High Pressure Stainless Steel Tubing
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
Cold drawn stainless steel round pipe is manufactured through a multi-stage drawing process that pulls a hot-rolled or extruded tube through a die at room temperature. This cold working process produces a pipe with superior dimensional accuracy, smoother surface finish, enhanced mechanical properties, and tighter wall thickness tolerances compared to hot finished alternatives.
The cold drawing process work-hardens the material, increasing tensile and yield strength while maintaining excellent uniformity. This makes cold-drawn pipes the preferred choice for precision applications such as hydraulic lines, instrumentation tubing, heat exchanger tubes, and high-pressure fluid transfer systems.
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | Cold Drawn Stainless Steel Round Pipe |
| Standards | ASTM A269, A213, A511, EN 10216-5, EN 10297-2, JIS G3459, GB/T 14976 |
| Construction Types | Seamless (CDS) / Welded and Drawn (W&D) |
| Grades | 304, 304L, 316, 316L, 316Ti, 321, 310S, 317L, 904L, Duplex 2205, 17-4PH |
| Outer Diameter (OD) | 3mm – 150mm (0.125″ – 6″) |
| Wall Thickness | 0.5mm – 15mm (0.020″ – 0.590″) |
| Length | 3m – 12m (10′ – 40′); random or fixed; coil options for small diameters |
| Surface Finish | Bright Annealed (BA), Pickled, Polished, Turned & Polished |
| Tolerance Class | h8, h9, h11, or custom |
Available Grades & Standards
| Grade | Standard | Key Characteristics | Typical Applications |
|---|---|---|---|
| 304/304L | ASTM A269 | General-purpose, good corrosion resistance | Instrumentation, food processing |
| 316/316L | ASTM A269 | Molybdenum added, chloride resistance | Marine, pharmaceutical, chemical |
| 316Ti | ASTM A213 | Titanium stabilized, high temperature | Heat exchangers, boilers |
| 321 | ASTM A213 | Titanium stabilized, 800-1500°F service | Aircraft, exhaust stacks |
| 310S | ASTM A213 | High temperature up to 2000°F | Furnace parts, heat treatment |
| 317L | ASTM A269 | Higher molybdenum than 316 | Pulp & paper, chemical processing |
| 904L | ASTM A269 | Super austenitic, severe corrosion | Sulfuric acid, seawater |
| 2205 | ASTM A789 | Duplex, high strength + SCC resistance | Offshore, desalination |
| 17-4PH | ASTM A564 | Precipitation hardening, high strength | Aerospace, oil & gas |
Cold Drawn Stainless Steel Round Pipe Chemical Composition (%)
| Grade | C | Mn | Si | Cr | Ni | Mo | Others |
|---|---|---|---|---|---|---|---|
| 304L | ≤0.030 | ≤2.00 | ≤1.00 | 18.0-20.0 | 8.0-12.0 | – | – |
| 316L | ≤0.030 | ≤2.00 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 316Ti | ≤0.08 | ≤2.00 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | Ti 5×C min |
| 321 | ≤0.08 | ≤2.00 | ≤1.00 | 17.0-19.0 | 9.0-12.0 | – | Ti 5×C min |
| 2205 | ≤0.030 | ≤2.00 | ≤1.00 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | N 0.14-0.20 |
Mechanical Properties
As-Cold Drawn (No Heat Treatment)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRB) |
|---|---|---|---|---|
| 304L | 620-860 | 450-690 | ≥20 | 85-95 |
| 316L | 620-860 | 450-690 | ≥20 | 85-95 |
| 2205 | 720-950 | 550-800 | ≥15 | 90-100 |
Cold Drawn + Annealed (Typical)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB max) |
|---|---|---|---|---|
| 304L | ≥485 | ≥170 | ≥40 | ≤201 |
| 316L | ≥485 | ≥170 | ≥40 | ≤217 |
| 316Ti | ≥515 | ≥205 | ≥35 | ≤217 |
| 321 | ≥515 | ≥205 | ≥35 | ≤217 |
| 2205 | ≥620 | ≥450 | ≥25 | ≤293 |
Physical Properties
| Property | 304/304L | 316/316L | 2205 |
|---|---|---|---|
| Density (g/cm³) | 7.93 | 7.98 | 7.80 |
| Modulus of Elasticity (GPa) | 193 | 193 | 190 |
| Thermal Conductivity (W/m·K) | 16.2 | 16.3 | 19.0 |
| Coefficient of Thermal Expansion (10⁻⁶/°C) | 17.2 | 17.2 | 13.7 |
| Electrical Resistivity (μΩ·cm) | 72 | 74 | 80 |
Dimensional Tolerances (Cold Drawn)
Cold drawing achieves significantly tighter tolerances than hot finished products:
OD Tolerances (ASTM A269)
| OD Range (mm) | Tolerance (mm) | ISO Class |
|---|---|---|
| 3 – 10 | ±0.05 | h9 |
| 10 – 25 | ±0.05 – ±0.08 | h9 |
| 25 – 40 | ±0.08 – ±0.10 | h9/h8 |
| 40 – 60 | ±0.10 – ±0.12 | h9 |
| 60 – 100 | ±0.12 – ±0.15 | h9/h11 |
| 100 – 150 | ±0.15 – ±0.20 | h11 |
Wall Thickness Tolerances
| Wall Thickness (mm) | Tolerance (%) |
|---|---|
| 0.5 – 2.0 | ±10% |
| 2.0 – 5.0 | ±8% |
| 5.0 – 15.0 | ±8% |
Length Tolerances
| Length Type | Tolerance |
|---|---|
| Random Length | 3m – 12m (no specific cut) |
| Fixed Length | +3mm / -0mm |
| Coiled Tube | Continuous lengths up to 500m |
Straightness
| Condition | Straightness |
|---|---|
| Standard | ≤0.8mm per meter |
| Precision | ≤0.5mm per meter |
| Ultra Precision | ≤0.3mm per meter |
Surface Roughness (Ra):
- Standard cold drawn: ≤1.6μm
- Polished: ≤0.4μm
- Bright annealed: ≤0.8μm
Cold Drawing Process
Cold Drawing Methods:
| Method | Description | Best For |
|---|---|---|
| Sunk Drawing | No internal support | Small OD reductions, general purpose |
| Rod Drawing | Mandrel supports ID | Precise ID and wall thickness |
| Plug Drawing | Floating or fixed plug | Thin walls, precision ID |
| Tube Reducing | Rotary forging process | Large reductions, heavy walls |
Why Multiple Passes?
- Each pass reduces OD and wall thickness by 15-30%
- Multiple passes allow for a greater total reduction
- Intermediate annealing restores ductility between passes
- Final pass determines final dimensions and surface finish
Cold Drawn vs. Hot Finished Comparison
| Feature | Cold Drawn | Hot Finished |
|---|---|---|
| Dimensional Tolerance | Very tight (h8/h9) | Loose (h11/h12) |
| Surface Finish | Smooth, bright | Rough, scaled |
| Strength (as-drawn) | Higher (work hardened) | Lower |
| Concentricity | Excellent | Moderate |
| Length Options | Coils available for small OD | Straight lengths only |
| Cost | Higher | Lower |
| Lead Time | Longer | Shorter |
| Best For | Precision, hydraulics, instrumentation | General industrial |
Cold Drawn vs. Cold Rolled
| Feature | Cold Drawn (Tube) | Cold Rolled (Tube) |
|---|---|---|
| Process | Pulled through the die | Rolled between dies |
| OD Range | 3mm – 150mm | 10mm – 300mm+ |
| Surface Finish | Very smooth | Smooth |
| Dimensional Control | Excellent | Good |
| Typical Use | Small to medium precision tubes | Larger diameter precision tubes |
Available Sizes (Standard Stock)
| OD (mm) | Wall Thickness (mm) |
|---|---|
| 6 | 1.0, 1.5, 2.0 |
| 8 | 1.0, 1.5, 2.0 |
| 10 | 1.0, 1.5, 2.0, 2.5 |
| 12 | 1.0, 1.5, 2.0, 2.5 |
| 14 | 1.5, 2.0, 2.5, 3.0 |
| 16 | 1.5, 2.0, 2.5, 3.0 |
| 18 | 1.5, 2.0, 2.5, 3.0 |
| 20 | 1.5, 2.0, 2.5, 3.0, 4.0 |
| 22 | 2.0, 2.5, 3.0, 4.0 |
| 25 | 2.0, 2.5, 3.0, 4.0, 5.0 |
| 28 | 2.0, 2.5, 3.0, 4.0, 5.0 |
| 30 | 2.0, 2.5, 3.0, 4.0, 5.0 |
| 32 | 2.5, 3.0, 4.0, 5.0 |
| 35 | 2.5, 3.0, 4.0, 5.0 |
| 38 | 2.5, 3.0, 4.0, 5.0 |
| 40 | 2.5, 3.0, 4.0, 5.0, 6.0 |
| 45 | 3.0, 4.0, 5.0, 6.0 |
| 50 | 3.0, 4.0, 5.0, 6.0, 8.0 |
| 60 | 4.0, 5.0, 6.0, 8.0 |
| 70 | 5.0, 6.0, 8.0, 10.0 |
| 80 | 5.0, 6.0, 8.0, 10.0 |
| 90 | 5.0, 6.0, 8.0, 10.0 |
| 100 | 5.0, 6.0, 8.0, 10.0, 12.0 |
Custom sizes available upon request
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Send your Cold Drawn Stainless Steel Round Pipe specifications to us— we will reply within 24 hours with pricing, tolerances, and MTR.
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Company
Shanxi Zhongcheng Metal Co., Ltd.
Location
Room 2, No. 221 Tianzhang Avenue, Fengdong New City, Xi'an, Shaanxi Province
Contact Person
Zhongcheng Metal