347H Stainless Steel Seamless Tube with Cold-Drawing Technique and Polished Surface Treatment in OD 6-630mm
Price:
US $4.85-7.25 / kg
MOQ:
50 kg
Delivery Time:
Negotiable
Product Description
347H Stainless Steel Seamless Tube
Alloy 347H (UNS S34709) stainless steel seamless tube offers excellent resistance to intergranular corrosion and enhanced creep resistance for high-temperature applications.
Product Specifications
| Parameter | Specification |
|---|---|
| Product Name | 347H Stainless Steel Seamless Tube |
| Round Outside Diameter | 1/2" - 24" |
| Thickness Schedule | SCH5, SCH10, SCH40, SCH80, SCH160, XXS |
| Material Grade | Special steel including Incone 904L, 254MO, 317L |
| Raw Material | TSING SHAN |
| Standard | ASTM A312, A269 |
| Length | Customized to customer requirements |
| Tolerance | Outer Diameter: ±0.2mm, Thickness: ±0.02mm, Length: ±5mm |
| Surface Treatment | Annealing, pickling, sandblasting |
| Marking | LOGO, SIZE, STANDARD, HEAT TREATMENT, custom requests |
| Testing | Squash test, extended test, water pressure test, heat treatment, NDT |
| Applications | Industrial, exhausting, water, petroleum, chemical, nuclear industry, electric power, shipbuilding, paper making, food, decoration, machinery and construction industries |
Material Properties
Alloy 347H stainless steel is stabilized by columbium and tantalum additions, providing excellent resistance to intergranular corrosion following exposure to temperatures between 800-1500°F (427-816°C).
Key Advantages
- Superior resistance to intergranular corrosion
- Enhanced creep and stress rupture properties
- Excellent high-temperature mechanical properties
- Good oxidation resistance up to 1500°F (816°C)
- Superior performance in strongly oxidizing environments
Chemical Composition
| Element | 347 (%) | 347H (%) |
|---|---|---|
| Chromium | 17.00-19.00 | 17.00-19.00 |
| Nickel | 9.00-13.00 | 9.00-13.00 |
| Carbon | 0.08 max | 0.04-0.10 |
| Manganese | 2.00 max | 2.00 max |
| Phosphorus | 0.045 max | 0.045 max |
| Sulfur | 0.03 max | 0.03 max |
| Silicon | 0.75 max | 0.75 max |
| Columbium & Tantalum | 10×(C+N) min - 1.00 max | 8×(C+N) min - 1.00 max |
| Iron | Balance | Balance |
Physical Properties
| Property | Value |
|---|---|
| Density | 0.288 lbs/in³ (7.96 g/cm³) |
| Specific Heat | 0.12 BTU/lb-°F (500 J/kg-°K) |
| Modulus of Elasticity | 28.0 × 10⁶ psi (193 GPa) |
| Thermal Conductivity | 133 BTU/hr/ft²/ft/°F (16.3 W/m-°K) |
| Melting Range | 2550-2635°F (1398-1446°C) |
| Electrical Resistivity | 72 Microhm-cm at 20°F |
Thermal Expansion
| Temperature Range | Coefficient of Thermal Expansion |
|---|---|
| 68-212°F (20-100°C) | 9.2 × 10⁻⁶ in/in°F (16.0 × 10⁻⁶ cm/cm°C) |
| 68-1112°F (20-600°C) | 10.5 × 10⁻⁶ in/in°F (18.9 × 10⁻⁶ cm/cm°C) |
| 68-1832°F (20-1000°C) | 11.4 × 10⁻⁶ in/in°F (20.5 × 10⁻⁶ cm/cm°C) |
Quality Assurance & Delivery
• Comprehensive quality control with dedicated inspection team
• Strict adherence to industry standards and customer specifications
• Acceptance of third-party inspection
• Large raw material stock ensuring timely order completion
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Get in Touch
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Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben