Hot Rolled SS SMLS Pipe Hot Finished Seamless Construction Stainless Steel Round Tube
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
Hot Rolled Stainless Steel SMLS Pipe is manufactured by heating a solid stainless steel billet to approximately 1200°C (2200°F) and then rolling it through a series of mills to form a hollow tube. This high-temperature forming process allows for the production of large diameter, thick wall pipes that cannot be efficiently manufactured through cold drawing methods.
Hot rolled seamless pipes are the backbone of heavy industrial piping systems, offering excellent mechanical properties, uniform wall thickness, and reliable performance in high-pressure, high-temperature, and corrosive environments. Unlike welded pipes, hot rolled seamless pipes have no longitudinal weld seam, eliminating the risk of weld-related failures in critical applications.
Key Benefits:
- No weld seam — eliminates weak points in high-pressure service
- Large diameters available (up to 600mm / 24″+)
- Thick wall capability (up to 50mm+)
- Excellent mechanical properties at elevated temperatures
- Cost-effective for large diameter, heavy wall applications
- Suitable for sour service and aggressive chemical environments
- Available in multiple grades, including high-temperature and duplex
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | Hot Rolled Stainless Steel SMLS Pipe |
| Standards | ASTM A312, A358, A213, A269, EN 10216-5, JIS G3459, GB/T 14976 |
| Construction | Seamless (Hot Rolled / Extruded) |
| Grades | 304, 304L, 304H, 316, 316L, 316H, 316Ti, 321, 321H, 310S, 317L, 347, 347H, 904L, Duplex 2205, Super Duplex 2507 |
| Outer Diameter (OD) | 50mm – 600mm (2″ – 24″+); larger sizes available on request |
| Wall Thickness | 3mm – 50mm+ (Schedule 10S through XXS) |
| Length | 3m – 12m (10′ – 40′); random or fixed lengths |
| Surface Finish | Black (as-rolled), Pickled, Sandblasted, Turned |
| Manufacturing Process | Hot Rolling / Hot Extrusion |
Available Grades & Standards
| Grade | Standard | Key Characteristics | Temperature Range | Typical Applications |
|---|---|---|---|---|
| 304/304L | ASTM A312 | General-purpose, good corrosion resistance | -196°C to 800°C | Chemical tanks, piping |
| 304H | ASTM A312 | High carbon version, better high-temp strength | 500°C – 800°C | High temperature service |
| 316/316L | ASTM A312 | Molybdenum added, chloride resistance | -196°C to 800°C | Marine, chemical, coastal |
| 316H | ASTM A312 | High carbon 316, high-temp creep resistance | 500°C – 800°C | High temp chemical service |
| 316Ti | ASTM A213 | Titanium stabilized, high temperature | -200°C to 800°C | Heat exchangers |
| 321/321H | ASTM A213 | Titanium stabilized, carbide precipitation resistant | 400°C – 900°C | Aircraft, exhaust, thermal |
| 310S | ASTM A312 | High temperature up to 1100°C | Up to 1100°C | Furnace parts, radiant tubes |
| 317L | ASTM A312 | Higher molybdenum than 316 | -196°C to 800°C | Pulp & paper, aggressive chemicals |
| 347/347H | ASTM A213 | Niobium stabilized, high temp | 400°C – 900°C | High temp, thermal cycling |
| 904L | ASTM A312 | Super austenitic, severe corrosion | -196°C to 400°C | Sulfuric acid, seawater |
| 2205 | ASTM A790 | Duplex, high strength + SCC resistance | -50°C to 300°C | Offshore, desalination |
| 2507 | ASTM A790 | Super duplex, highest strength | -50°C to 300°C | Subsea, chemical tankers |
Chemical Composition (%)
| Grade | C | Mn | Si | Cr | Ni | Mo | N | Others |
|---|---|---|---|---|---|---|---|---|
| 304L | ≤0.030 | ≤2.00 | ≤1.00 | 18.0-20.0 | 8.0-12.0 | – | – | – |
| 304H | 0.04-0.10 | ≤2.00 | ≤1.00 | 18.0-20.0 | 8.0-11.0 | – | – | – |
| 316L | ≤0.030 | ≤2.00 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – | – |
| 316H | 0.04-0.10 | ≤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 | – | – | – |
| 321 | ≤0.08 | ≤2.00 | ≤1.00 | 17.0-19.0 | 9.0-12.0 | – | – | Ti ≥5×C |
| 2205 | ≤0.030 | ≤2.00 | ≤1.00 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | – |
| 2507 | ≤0.030 | ≤1.20 | ≤0.80 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | – |
Mechanical Properties
Hot Rolled + Annealed Condition (Typical)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB max) |
|---|---|---|---|---|
| 304L | ≥485 | ≥170 | ≥40 | ≤201 |
| 304H | ≥515 | ≥205 | ≥40 | ≤201 |
| 316L | ≥485 | ≥170 | ≥40 | ≤217 |
| 316H | ≥515 | ≥205 | ≥40 | ≤217 |
| 310S | ≥515 | ≥205 | ≥40 | ≤217 |
| 321 | ≥515 | ≥205 | ≥35 | ≤217 |
| 2205 | ≥620 | ≥450 | ≥25 | ≤293 |
| 2507 | ≥730 | ≥550 | ≥20 | ≤310 |
High Temperature Properties (316H – Typical)
| Temperature (°C) | Tensile Strength (MPa) | Yield Strength (MPa) | Creep Rupture (100,000h) |
|---|---|---|---|
| 500 | 450 | 180 | 120 MPa |
| 600 | 350 | 140 | 70 MPa |
| 700 | 220 | 90 | 35 MPa |
| 800 | 140 | 55 | 15 MPa |
Physical Properties
| Property | 304/304L | 316/316L | 310S | 2205 |
|---|---|---|---|---|
| Density (g/cm³) | 7.93 | 7.98 | 7.98 | 7.80 |
| Modulus of Elasticity (GPa) | 193 | 193 | 190 | 190 |
| Melting Point (°C) | 1400-1450 | 1370-1400 | 1400-1450 | 1350-1400 |
| Thermal Conductivity at 100°C (W/m·K) | 16.2 | 16.3 | 14.2 | 19.0 |
| Thermal Expansion (20-100°C) (10⁻⁶/°C) | 17.2 | 17.2 | 15.9 | 13.7 |
| Electrical Resistivity (μΩ·cm) | 72 | 74 | 78 | 80 |
Dimensions & Schedule Chart
Standard Hot Rolled Pipe Sizes (ASTM A312)
| NPS (inch) | OD (mm) | Schedule 10S (mm) | Schedule 40S (mm) | Schedule 80S (mm) | Schedule 160 (mm) | XXS (mm) |
|---|---|---|---|---|---|---|
| 2″ | 60.3 | 2.77 | 3.91 | 5.54 | 8.74 | 11.07 |
| 3″ | 88.9 | 3.05 | 5.49 | 7.62 | 11.13 | 15.24 |
| 4″ | 114.3 | 3.05 | 6.02 | 8.56 | 13.49 | 17.12 |
| 6″ | 168.3 | 3.40 | 7.11 | 10.97 | 18.26 | 21.95 |
| 8″ | 219.1 | 3.76 | 8.18 | 12.70 | 23.01 | 22.23 |
| 10″ | 273.1 | 4.19 | 9.27 | 15.09 | 28.58 | 25.40 |
| 12″ | 323.9 | 4.57 | 10.31 | 17.48 | 33.32 | 25.40 |
| 14″ | 355.6 | 3.96 | 11.13 | 19.05 | 35.71 | – |
| 16″ | 406.4 | 4.19 | 12.70 | 21.44 | 40.49 | – |
| 18″ | 457.2 | 4.19 | 14.27 | 23.83 | 45.24 | – |
| 20″ | 508.0 | 4.78 | 15.09 | 26.19 | 50.01 | – |
| 24″ | 609.6 | 5.54 | 17.48 | 30.96 | 59.54 | – |
Larger Diameters Available on Request
| OD (mm) | Typical Wall Thicknesses (mm) |
|---|---|
| 711 (28″) | 8.0 – 50.0 |
| 813 (32″) | 8.0 – 50.0 |
| 914 (36″) | 10.0 – 60.0 |
| 1016 (40″) | 10.0 – 60.0 |
| 1219 (48″) | 12.0 – 60.0 |
Dimensional Tolerances (ASTM A312 – Hot Rolled)
| Parameter | Tolerance |
|---|---|
| OD (≤100mm) | ±0.5mm |
| OD (100-200mm) | ±0.8mm |
| OD (200-300mm) | ±1.0mm |
| OD (300-500mm) | ±1.5mm |
| OD (>500mm) | ±2.0mm or ±0.5% |
| Wall Thickness | ±12.5% |
| Length (fixed) | +5mm / -0mm |
| Straightness | ≤1.5mm per meter |
| Out-of-Roundness | Within OD tolerance |
Contact Us for a Quote
Send your Hot Rolled Stainless Steel SMLS Pipe specifications to us — we will reply within 24 hours with pricing, availability, 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