347 Stainless Steel Sheet

347 stainless steel is an austenitic stainless steel grade known for its excellent corrosion resistance and durability at elevated temperatures, specifically between 800°F and 1600°F. This material is particularly suited for heavy welded applications that cannot undergo re-annealing.

Overview of 347 and 347H Stainless Steel

347 and 347H stainless steel plates are general-purpose alloys characterized by a face-centered cubic structure. They are non-magnetic in their annealed state and can only be hardened through cold working. The addition of niobium helps to prevent grain boundary chromium carbide precipitation. The 347H variant contains higher carbon content, enhancing its toughness and overall durability compared to 347.

These stainless steel plates are available in various sizes and thicknesses, ranging from 0.188” to 4”, at suppliers like Penn Stainless Products. For specific dimensions or additional inquiries about 347 stainless steel sheets, potential customers are encouraged to reach out to the Penn Stainless team.

Chemical Composition

The chemical makeup of 347 and 347H stainless steel plates features specific properties:

• 347: Maximum carbon content of 0.08%
• 347H: Carbon content between 0.04% and 0.10%
• Chromium: 17.0% to 20.0%
• Manganese: No more than 2.0%
• Nickel: 9.0% to 13.0%
• Phosphorous: 347 (max 0.04%), 347H (max 0.03%)
• Sulfur: Maximum 0.30%
• Silicon: Maximum 0.75%
• Niobium: Maximum 1.0%

Niobium is crucial for imparting unique characteristics to these grades.

Mechanical Properties

347 and 347H stainless steel plates exhibit the following mechanical properties:

• Tensile Strength: 75 ksi
• Yield Strength (0.2%): 30 ksi
• Elongation: 40%
• Brinell Hardness: 201
• Rockwell B Hardness: 95

Physical Properties

Key physical properties of 347 and 347H stainless steel include:

• Density: 0.288 lb/in³ at 68°F
• Coefficient of Thermal Expansion:
  • 68°F to 212°F: 9.2 min/in
  • 68°F to 1,832°F: 11.4 min/in
• Thermal Conductivity: 14.7 BTU/hr-ft (68°F to 932°F)
• Specific Heat: 0.12 BTU/lbm (32°F to 212°F)

Applications and Usage

347 stainless steel is widely used in industries requiring materials that can withstand severe corrosive conditions. Common applications include:

• Equipment in the chemical and petroleum refining industries
• Boiler tubes and casings
• Radiant super heaters and high-pressure steam pipes
• Heat exchangers and tubes
• Aircraft exhaust stacks and collector rings
• Equipment and storage vessels in the food processing and pharmaceutical industries

Processing and Fabrication Options

347 stainless steel sheets can be processed and fabricated through various methods, including:

• Plasma Cutting
• Plate Saw Cutting
• Shearing
• Laser Cutting
• Waterjet Cutting
• Forming
• Welding
• Machining
• Plate Leveling

For detailed specifications, potential buyers may refer to the 347 stainless steel data sheet provided by manufacturers or suppliers.