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ASTM A213 347H Stainless Steel Heat Exchanger Tube with Cold-Drawing and Polished Finish
Product Details
| Model NO. | 347H | Shape | Round |
|---|---|---|---|
| Technique | Cold-Drawing | Surface Treatment | Polished |
| Specification | OD 6-630mm | Outside Diameter | 1/2"-24" |
| Thickness | SCH5 SCH10 SCH40 SCH80 SCH160 XXS | Material Grade | Incone 904L, 254MO, 317L |
| Standard | ASTM A312, A269 | Length Tolerance | +/- 5mm |
| Outer Diameter Tolerance | +/- 0.2mm | Thickness Tolerance | +/- 0.02mm |
| Density | 7.96 G/cm3 | Melting Range | 2550 - 2635°F (1398 - 1446°C) |
| Thermal Conductivity | 16.3 W/m-°K | ||
| Highlight | 347H Stainless Steel Tube,Cold-Drawing Heat Exchanger Tube,Polished Seamless Pipe |
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Product Description
ASTM A213 347/347H Stainless Steel Heat Exchanger Tubes for Oil Industry
High-quality 347H stainless steel seamless tubes offering excellent performance in demanding oil industry applications with competitive pricing and superior corrosion resistance.
Product Specifications
| Parameter | Specification |
|---|---|
| Product Name | 347H Stainless Steel Seamless Tubes |
| Round Outside Diameter | 1/2" - 24" |
| Thickness | SCH5, SCH10, SCH40, SCH80, SCH160, XXS |
| Material Grade | Special steel: Incone 904L, 254MO, 317L and similar alloys |
| 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 requirements |
| Quality Assurance | Dedicated inspection team, strict standards, accepts customer and third-party inspection |
| Applications | Industrial, exhaust systems, water, petroleum, chemical, nuclear industry, electric power, shipbuilding, paper making, food processing, decoration, machinery and construction industries |
| Testing | Squash test, extended test, water pressure test, heat treatment, NDT |
| Delivery | Large raw material stock ensures timely order completion |
Alloy 347 (S34700) is a stabilized stainless steel that offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). The alloy is stabilized by the addition of columbium and tantalum, providing superior high-temperature mechanical properties and enhanced creep resistance compared to standard 304 and 304L alloys.
Material Properties
General Characteristics
Alloy 347 (UNS S34700) is a columbium-stabilized austenitic stainless steel with excellent general corrosion resistance and superior performance in strong oxidizing conditions. It maintains excellent resistance to intergranular corrosion after exposure to temperatures between 800-1500°F (427-816°C), with good oxidation resistance and creep strength up to 1500°F (816°C).
Corrosion Resistance
- Excellent resistance to intergranular corrosion in chromium carbide precipitation range
- Superior performance in strongly oxidizing environments up to 1500°F (816°C)
- Suitable for nitric solutions and diluted organic acids at moderate temperatures
- Resists polythionic acid stress corrosion cracking in hydrocarbon service
- Not recommended for chloride solutions or sulfuric acid applications
Chemical Composition
| Element | 347 (%) | 347H (%) |
|---|---|---|
| Chromium | 17.00 min. - 19.00 max. | 17.00 min. - 19.00 max. |
| Nickel | 9.00 min. - 13.00 max. | 9.00 min. - 13.00 max. |
| Carbon | 0.08 max. | 0.04 min. - 0.10 max. |
| 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 x (C + N) min. - 1.00 max. | 8 x (C + N) min. - 1.00 max. |
| Iron | 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 x 10⁶ psi (193 GPa) |
| Thermal Conductivity (200°F/100°C) | 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 Coefficients
| Temperature Range | °F | °C | in/in °F | cm/cm °C |
|---|---|---|---|---|
| Low Range | 68-212 | 20-100 | 9.2 x 10⁻⁶ | 16.0 x 10⁻⁶ |
| Medium Range | 68-1112 | 20-600 | 10.5 x 10⁻⁶ | 18.9 x 10⁻⁶ |
| High Range | 68-1832 | 20-1000 | 11.4 x 10⁻⁶ | 20.5 x 10⁻⁶ |
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