- Excellent resistance to intergranular corrosion
- Superior performance in high temperature environments
- Good oxidation resistance up to 870°C
- Stabilized with niobium (Nb) to prevent carbide precipitation
- Excellent weldability and fabrication properties
- Long service life in demanding conditions
347 Stainless Steel Round Bar
347 stainless steel round bar is a niobium-stabilized austenitic stainless steel designed for improved resistance to intergranular corrosion. Compared with 304 stainless steel, 347 offers better performance in high-temperature environments and after welding.
We supply high-quality 347 stainless steel round bar, ASTM A276 347 bar, and stainless steel rod products for industrial and engineering applications worldwide.
Key Features
- Excellent resistance to intergranular corrosion
- Superior performance in high temperature environments
- Good oxidation resistance up to 870°C
- Stabilized with niobium (Nb) to prevent carbide precipitation
- Excellent weldability and fabrication properties
- Long service life in demanding conditions
Chemical Composition (Typical)
| Element | Content (%) |
|---|---|
| C | ≤ 0.08 |
| Cr | 17.0 – 19.0 |
| Ni | 9.0 – 13.0 |
| Nb | ≥ 10 × C |
| Mn | ≤ 2.0 |
| Si | ≤ 0.75 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 201 HB |
Available Sizes
- Diameter: 6 mm – 500 mm
- Length: 3 m / 6 m / Custom
- Surface Finish:
- Black (Hot Rolled)
- Bright (Cold Drawn)
- Polished / Peeled
Standards & Equivalents
- ASTM A276 / A479
- UNS S34700
- EN 1.4550
- JIS SUS347
Applications
347 stainless steel round bars are widely used in:
- Aerospace components
- Heat exchangers
- Chemical processing equipment
- Oil & gas industry
- Power generation plants
- Boiler and pressure vessels
Especially suitable for high temperature applications and welded structures.
347 vs 304 Stainless Steel
- Better high-temperature strength than 304
- Improved resistance to intergranular corrosion
- More suitable for welded components
- Longer lifespan in thermal cycling environments
Packaging & Delivery
- Standard export seaworthy packing
- Wooden cases / bundles / protective film
- Delivery time: 7–15 days
Why Choose Us
- Professional stainless steel round bar supplier
- Competitive price and stable supply
- Full size range and custom cutting service
- Strict quality inspection (PMI / UT available)
- Global export experience
FAQ
What is 347 stainless steel round bar used for?
347 stainless steel round bar is widely used in high temperature applications such as heat exchangers, aerospace components, and chemical processing equipment.
What is the difference between 347 and 304 stainless steel?
347 contains niobium, which improves resistance to intergranular corrosion and makes it more suitable for welded and high-temperature environments.
Do you supply ASTM A276 347 round bar?
Yes, we supply ASTM A276 347 stainless steel round bar with full certification and global delivery.
What is the price of 347 stainless steel round bar?
The price depends on size, quantity, and surface finish. Contact us for the latest 347 round bar price and stock availability.
Get a Quote
Looking for a reliable 347 stainless steel round bar supplier?
Contact us now for best price and fast delivery.
Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
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