347H Stainless Steel Seamless Tube with Cold-Drawing Technique and Polished Surface Treatment in OD 6-630mm
Price:
4.85
MOQ:
50
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 performance in high-temperature applications.
Product Specifications
| 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 |
| Quality Assurance | Internal inspection team, strict standards, third-party inspection accepted |
| Testing | Squash test, extended test, water pressure test, heat treatment, NDT |
| Delivery | Large raw material stock ensures timely order completion |
Applications
Industrial, exhausting, water, petroleum, chemical, nuclear industry, electric power, shipbuilding, paper making, food, decoration, machinery and construction industries.
Alloy 347H Properties Overview
Alloy 347H stainless steel is stabilized by columbium and tantalum, providing excellent resistance to intergranular corrosion following exposure to temperatures between 800-1500°F (427-816°C). This alloy offers superior creep and stress rupture properties compared to Alloy 304 and 304L.
General Properties
Alloy 347H (UNS S34709) is the higher carbon (0.04-0.10) version developed for enhanced creep resistance and higher strength at temperatures above 1000°F (537°C). The alloy cannot be hardened by heat treatment, only by cold working, and can be easily welded using standard fabrication practices.
Corrosion Resistance
Alloy 347H exhibits good general corrosion resistance comparable to 304 stainless steel. It performs well in nitric solutions, diluted organic acids, and pure phosphoric acid. The alloy resists polythionic acid stress corrosion cracking in hydrocarbon service but does not perform well in chloride solutions or sulfuric acid.
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 x (C + N) min - 1.00 max | 8 x (C + N) min - 1.00 max |
| Iron | Balance | Balance |
Physical Properties
| 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 | 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 | Mean Coefficient |
|---|---|
| 68-212°F (20-100°C) | 9.2 x 10⁻⁶ in/in °F (16.0 x 10⁻⁶ cm/cm °C) |
| 68-1112°F (20-600°C) | 10.5 x 10⁻⁶ in/in °F (18.9 x 10⁻⁶ cm/cm °C) |
| 68-1832°F (20-1000°C) | 11.4 x 10⁻⁶ in/in °F (20.5 x 10⁻⁶ cm/cm °C) |
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Company
TSING SHAN STEEL INDUSTRIAL LIMITED
Location
NO.288,Youyi Road Xi Shan Dristrict , Wuxi, Jiangsu, China
Contact Person
Gao Ben