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ASTM A312 347H Stainless Steel Seamless Pipe with Sch 80s Thickness and Polished Surface
Product Details
| 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 | Surface Treatment | Annealing, Pickling, Sandblasting |
| Chromium Content | 17.00 Min.-19.00 Max. | Nickel Content | 9.00 Min.-13.00 Max. |
| Carbon Content | 0.08 (347), 0.04 Min.-0.10 Max. (347H) | Density | 7.96 G/cm3 |
| Melting Range | 2550 - 2635°F (1398 - 1446°C) | Thermal Conductivity | 16.3 W/m-°K At 100°C |
| Modulus Of Elasticity | 193 GPa | ||
| Highlight | ASTM A312 Stainless Steel Pipe,Sch 80s Seamless Pipe,Polished Surface 347H Stainless Steel Tube |
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Product Description
ASTM A312 TP347/H Schedule 80s Seamless Pipe
Φ 73mm (2.5inch) diameter, 7.01mm thickness seamless pipe
Product Specifications
| Parameter | Specification |
|---|---|
| Product Name | 347H Stainless Steel Seamless Tube |
| Shape | Round |
| Outside Diameter | 1/2" - 24" |
| Thickness | SCH5, SCH10, SCH40, SCH80, SCH160, XXS |
| Material Grade | Special steel: Incone 904L, 254MO, 317L and similar |
| Raw Material | Tsing Shan, Walsin, YXSS |
| Standard | ASTM A312, A269 |
| Length | Customized to customer requirements |
| Tolerance | OD: ±0.2mm, Thickness: ±0.02mm, Length: ±5mm |
| Surface Treatment | Annealing, pickling, sandblasting |
| Marking | LOGO, SIZE, STANDARD, HEAT TREATMENT, customer requests |
| Quality Control | Internal inspection team, strict standards, third-party inspection accepted |
| Applications | Industrial, exhaust, water, petroleum, chemical, nuclear, power, shipbuilding, paper, food, decoration, machinery, construction |
| Testing | Squash test, extended test, water pressure test, heat treatment, NDT |
| Delivery | Large raw material stock ensures timely order completion |
Alloy 347/347H Stainless Steel Overview
Alloy 347 (S34700) is a stabilized stainless steel offering excellent resistance to intergranular corrosion following exposure to temperatures between 800-1500°F (427-816°C). Stabilized by columbium and tantalum additions, it provides superior high-temperature mechanical properties with higher creep and stress rupture capabilities compared to Alloy 304 and 304L.
General Properties
Alloy 347 (UNS S34700) is a columbium-stabilized austenitic stainless steel with good general corrosion resistance and enhanced performance in strong oxidizing conditions compared to 321 stainless. It maintains excellent intergranular corrosion resistance after exposure to 800-1500°F (427-816°C) and offers good oxidation resistance and creep strength up to 1500°F (816°C).
Alloy 347H (UNS S34709) features higher carbon content (0.04-0.10) for enhanced creep resistance and higher strength 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 347 stainless steel exhibits corrosion resistance comparable to 304 stainless, with superior performance in the 800-1500°F temperature range where unstabilized alloys suffer intergranular attack. It performs better than Alloy 321 in strongly oxidizing environments up to 1500°F (816°C).
Suitable for nitric solutions, most diluted organic acids at moderate temperatures, and pure phosphoric acid at lower 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 | 17.00-19.00 | 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
| 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 Coefficients
| Temperature Range | Expansion Coefficient |
|---|---|
| 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) |
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