Seamless Stainless Steel Round Pipe ASTM A312 304/304L/316/316L Schedule 10S To XXS
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
Seamless stainless steel round pipe is manufactured without any weld seam, created by extruding a solid billet through a mandrel to form a hollow tube. This process results in a pipe with uniform wall thickness, superior pressure resistance, and excellent structural integrity — making it the preferred choice for high-pressure, high-temperature, and corrosive environments.
Unlike welded pipes, seamless pipes have no weak points along the longitudinal seam, offering reliable performance in critical applications such as chemical processing, oil and gas transportation, power generation, and boiler systems.
Key Benefits:
- No weld seam eliminates the risk of seam failure
- Excellent pressure and temperature resistance
- Uniform wall thickness and consistent mechanical properties
- Suitable for bending, flanging, and similar forming operations
- Available in multiple grades (304/304L/316/316L/321/310S, etc.)
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | Seamless Stainless Steel Round Pipe |
| Standards | ASTM A312, A213, A269, A511, EN 10216-5, JIS G3459, GB/T 14976 |
| Grades | 304, 304L, 316, 316L, 316Ti, 321, 310S, 317L, 904L, Duplex 2205 |
| Dimensions | 1/2″ – 24″ OD (6mm – 610mm) |
| Wall Thickness | Schedule 10S, 20, 40, 80, 160, XXS (1.0mm – 50mm) |
| Length | 3m – 12m (random, fixed, or custom lengths) |
| Surface Finish | Pickled, Bright Annealed (BA), Polished (Mirror), Turned |
| Manufacturing Process | Hot Rolled / Cold Drawn / Cold Rolled |
Available Grades & Standards
| Grade | Standard | Key Characteristics | Typical Applications |
|---|---|---|---|
| 304 | ASTM A312 | General-purpose, good corrosion resistance | Food processing, dairy, beverage |
| 304L | ASTM A312 | Low carbon, better weldability | Chemical tanks, welded equipment |
| 316 | ASTM A312 | Molybdenum added, chloride resistance | Marine, pharmaceutical, coastal |
| 316L | ASTM A312 | Low-carbon version of 316 | High chloride environments |
| 316Ti | ASTM A213 | Titanium stabilized, high temperature | Exhaust systems, heat exchangers |
| 321 | ASTM A213 | Titanium stabilized, 800-1500°F service | Aircraft, exhaust stacks |
| 310S | ASTM A312 | High temperature up to 2000°F | Furnace parts, heat treatment |
| 317L | ASTM A312 | Higher molybdenum than 316 | Pulp & paper, chemical processing |
| 904L | ASTM A312 | Super austenitic, severe corrosion | Sulfuric acid, seawater |
| 2205 | ASTM A790 | Duplex, high strength + SCC resistance | Offshore, desalination |
Chemical Composition (%)
| Grade | C | Mn | Si | Cr | Ni | Mo | Others |
|---|---|---|---|---|---|---|---|
| 304 | ≤0.08 | ≤2.00 | ≤1.00 | 18.0-20.0 | 8.0-11.0 | – | – |
| 304L | ≤0.030 | ≤2.00 | ≤1.00 | 18.0-20.0 | 8.0-12.0 | – | – |
| 316 | ≤0.08 | ≤2.00 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 316L | ≤0.030 | ≤2.00 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 310S | ≤0.08 | ≤2.00 | ≤1.50 | 24.0-26.0 | 19.0-22.0 | – | – |
| 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 (Typical)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB max) |
|---|---|---|---|---|
| 304 | ≥515 | ≥205 | ≥40 | ≤201 |
| 304L | ≥485 | ≥170 | ≥40 | ≤201 |
| 316 | ≥515 | ≥205 | ≥40 | ≤217 |
| 316L | ≥485 | ≥170 | ≥40 | ≤217 |
| 310S | ≥515 | ≥205 | ≥40 | ≤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 |
Dimensions & Schedule Chart
Standard Pipe Sizes (ANSI B36.19)
| NPS (inch) | OD (mm) | Schedule 10S (mm) | Schedule 40S (mm) | Schedule 80S (mm) |
|---|---|---|---|---|
| 1/2″ | 21.3 | 2.11 | 2.77 | 3.73 |
| 3/4″ | 26.7 | 2.11 | 2.87 | 3.91 |
| 1″ | 33.4 | 2.77 | 3.38 | 4.55 |
| 1-1/2″ | 48.3 | 2.77 | 3.68 | 5.08 |
| 2″ | 60.3 | 2.77 | 3.91 | 5.54 |
| 3″ | 88.9 | 3.05 | 5.49 | 7.62 |
| 4″ | 114.3 | 3.05 | 6.02 | 8.56 |
| 6″ | 168.3 | 3.40 | 7.11 | 10.97 |
| 8″ | 219.1 | 3.76 | 8.18 | 12.70 |
| 10″ | 273.1 | 4.19 | 9.27 | 15.09 |
| 12″ | 323.9 | 4.57 | 10.31 | 17.48 |
Custom sizes available upon request
Dimensional Tolerances
| Parameter | Cold Drawn | Hot Rolled |
|---|---|---|
| OD Tolerance | ±0.1mm (≤50mm); ±0.2% (>50mm) | ±0.5mm – ±1.5% |
| Wall Thickness Tolerance | ±10% | ±12.5% |
| Length Tolerance (fixed) | +3mm / -0mm | +5mm / -0mm |
| Straightness | ≤1.0mm per meter | ≤1.5mm per meter |
Advantages of Seamless vs. Welded Pipe
| Feature | Seamless Pipe | Welded Pipe |
|---|---|---|
| Weld Seam | None | Present |
| Pressure Rating | Higher | Moderate |
| Uniformity | Uniform wall thickness | Potential variation at the weld |
| Corrosion Resistance | Uniform throughout | The weld area may be susceptible |
| Size Range | Up to 24″ | Unlimited (larger sizes) |
| Cost | Higher | Lower |
| Lead Time | Longer | Shorter |
| Best For | High pressure, high temp, corrosive media | General-purpose, low-pressure, large-diameter |
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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