Chemical Composition and Mechanical Properties of Austenitic 347H (S34709) Stainless Steel

Chemical Composition:

Mechanical Properties:

Applications and Industries Using 347H Stainless Steel Plates and Coils

1. Chemical Processing Industry: Used in reactors, pipelines, and storage tanks due to excellent corrosion resistance.
2. Petrochemical Industry: Handles high-pressure, high-temperature environments in refineries, distillation units, and transfer lines.
3. Power Generation: Suitable for boiler tubes, heat exchangers, and steam pipes in nuclear and thermal power plants.
4. Aerospace Industry: Used in exhaust systems, collector rings, and other high-temperature components.
5. Food Processing Equipment: Ideal for cookers and drying equipment due to its hygienic properties.
6. Marine Applications: Resistant to oxidation in seawater environments.

Corrosion Resistance and High-Temperature Performance of 347H Stainless Steel

1. Excellent resistance to intergranular corrosion due to columbium stabilization.
2. Superior performance in high-temperature environments up to ~816°C (1500°F).
3. Comparable oxidation resistance to other austenitic grades like Alloy 304.
4. Resistant to stress corrosion cracking in aqueous environments.

Manufacturing Process and Available Dimensions for 347H Stainless Steel

Available Dimensions:

Manufactured through hot rolling followed by annealing at temperatures between 1800-2000°F.

Welding and Fabrication Considerations for 347H Stainless Steel

1. Excellent weldability using common methods like GTAW, GMAW, and SMAW.
2. No preheating required; interpass temperature should be controlled.
3. Post-weld annealing is generally unnecessary but can be applied for stress relief.

Comparison of 347H with Other Austenitic Stainless Steel Grades

Cost-Effectiveness and Long-Term Benefits of Using 347H Stainless Steel

1. Longer service life in high-temperature environments reduces maintenance costs.
2. High strength-to-weight ratio allows for thinner material usage.
3. Superior resistance to corrosion minimizes downtime in critical applications.

At HL Steel Company, we provide premium-quality Austenitic 347H (S34709) stainless steel plates and coils tailored for demanding industrial applications, ensuring optimal performance, reliability, and cost-effectiveness for your projects!