Stainless Steel 347H Pipes bring higher creep strength to your projects. GXH Steels supplies these pipes for demanding industrial applications where standard grades fall short.
What Is Stainless Steel 347H?
Grade 347H stainless steel belongs to the Austenitic family. It contains 18% Cr, 11% Ni, Nb/Ta, higher carbon. This composition gives the material its higher creep strength.
GXH Steels manufactures Stainless Steel 347H Pipes to meet ASTM and international standards. Each pipe goes through quality checks before shipping.
For applications needing standard carbon, Stainless Steel 347 Pipes provide an excellent choice.
Key Features
Here’s what sets Stainless Steel 347H Pipes apart:
- Corrosion Resistance – For sustained high-temperature pressure service.
- Temperature Performance – Rated for service up to 870°C continuous.
- Material Composition – Contains 18% Cr, 11% Ni, Nb/Ta, higher carbon for balanced properties.
- Quality Assurance – Every batch includes mill test certificates and documentation.
Projects requiring titanium-stabilized may also benefit from Grade 321H Pipes.
Stainless Steel 347H Pipes Chemical Composition
The chemical composition of Grade 347H stainless steel per ASTM/AISI standards:
| Element | Composition (%) |
|---|---|
| C | 0.04-0.10 |
| Mn | 2.00 |
| Si | 0.75 |
| P | 0.045 |
| S | 0.030 |
| Cr | 17.0-19.0 |
| Ni | 9.0-13.0 |
| Nb | 8xC-1.0 |
Stainless Steel 347H Pipes Mechanical Properties
Mechanical properties of Grade 347H in annealed condition:
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa (74694 psi) |
| Yield Strength (0.2%) | 205 MPa (29732 psi) |
| Elongation (in 50mm) | 40% |
| Hardness | 183 HB (Brinell) |
Stainless Steel 347H Pipes Physical Properties
Physical characteristics of Grade 347H stainless steel:
| Property | Value |
|---|---|
| Density | 7.96 g/cm³ |
| Melting Range | 1400-1425°C |
| Thermal Conductivity (at 100°C) | 16.1 W/m·K |
| Specific Heat | 500 J/kg·K |
| Electrical Resistivity | 73 μΩ·cm |
| Thermal Expansion (20-100°C) | 16.6 μm/m·°C |
Available Sizes and Dimensions
GXH Steels supplies Stainless Steel 347H Pipes in the following size range:
| Specification | Range |
|---|---|
| Nominal Pipe Size | 1/8″ to 24″ NPS (DN6 to DN600) |
| Wall Thickness | 0.5mm to 50mm |
| Length | Up to 12 meters (random or fixed) |
| Schedules Available | 5S, 10S, 40S, 80S, SCH 10, SCH 40, SCH 80, SCH 160, XXS |
Applicable Standards
Stainless Steel 347H Pipes conform to these industry standards:
- Seamless Pipes: ASTM A312, ASTM A213, ASTM A269
- Welded Pipes: ASTM A312, ASTM A358, ASTM A409
- Tubes: ASTM A213, ASTM A249, ASTM A269
- General: EN 10088, JIS G4304/G4305
Applications
Stainless Steel 347H Pipes work well for:
- Superheater tubes
- High-temp process equipment
- General industrial piping
- Power plants industry installations
Benefits
Choosing Stainless Steel 347H Pipes saves you money on replacements and downtime. The material handles superheater tubes and high-temp process equipment conditions without degrading quickly. You get pipes that perform as expected, backed by GXH Steels’s technical support.
Why GXH Steels?
GXH Steels has supplied stainless steel products to power plants and refining sectors for years. Our team knows the technical details of each grade. We help you pick the right specification for your project and provide documentation for your quality requirements.
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