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Introductions Alloy 347 Round Bar
AMS 5646 stainless steel, also known as Type 347 or 347 stainless steel, is a high-strength material that is ideal for applications that require excellent resistance to oxidation and corrosion. This 347 stainless steel bar material is often used in the aerospace, automotive, and chemical processing industries to create components that need to withstand extreme heat and harsh environments.
Stainless Steel 347 (AMS 5646) Material Composition
Alloy 347 Stainless Steel is a stabilized austenitic stainless steel containing chromium and nickel.
Niobium (Columbium) addition for enhanced 347 round bar intergranular corrosion resistance.
Resistant to chromium carbide precipitation, ensuring durability in high-temperature applications.
AMS 5646 SS 347 Material Properties:
1. High Temperature Performance:
Withstands elevated temperatures, making 1.4550 stainless steel rod suitable for applications in heat exchangers, furnace components, and high-temperature chemical processes.
2. Corrosion Resistance:
S34700 stainless steel exhibits excellent corrosion resistance in a variety of corrosive environments, including acidic and chloride-containing media. Particularly resistant to intergranular corrosion due to its stabilization with niobium.
3. Weldability:
Alloy 347 Stainless Steel rod offers good weldability and can be easily welded using common welding methods. Maintains its corrosion resistance in the welded condition.
4. Mechanical Properties:
AISI 347 stainless steel bar possesses desirable mechanical properties, including high tensile and yield strength. Suitable for structural components and applications demanding robust mechanical performance.
5. Machinability:
347 round bar demonstrates good machinability, facilitating the production of precision components and parts.
Specifications (AMS 5646/ Stainless Steel 347)
| Property / Feature | Specification Details |
| Standard Specifications | AMS 5646, ASTM A276, ASME SA276, ASTM A479 |
| Equivalent Grades | AISI 347, UNS S34700, DIN 1.4550, X6CrNiNb18-10, SUS 347 |
| Delivery Condition | Solution Annealed, Centerless Ground, Cold Drawn, or Hot Rolled |
| Dimensional Range | Diameters ranging from 5mm up to 500mm; customizable cut-to-length sizes |
| Surface Finish Options | Bright, Pickled, Polished, or Black finish based on application needs |
Stainless Steel 347 Applications
Due to its robust mechanical thresholds and superior oxidation defense, AMS 5646 bars are regularly machined into high-stress components for:
- Aircraft collector rings, exhaust stacks, and jet engine components
- High-temperature chemical processing equipment and refining reactors
- Boiler tubes, furnace heating elements, and heavy-duty heat exchangers
- Severe-service valve trims, fasteners, and fluid-handling pump shafts
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