Stainless steel coils are essential industrial materials that are rolled and coiled after processing to suit various applications. Among them, SS 347H Coils are widely recognized for their strength, corrosion resistance, and high-temperature performance, making them ideal for industries ranging from automotive and aerospace to household appliances and chemical processing.
What is SS 347H?
SS 347H is a high-carbon variant of stainless steel 347, with carbon content ranging from 0.04% to 0.10%, denoted by the “H” in its grade name. This higher carbon content provides:
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Enhanced creep resistance for prolonged exposure to heat
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Superior strength above 1000°F (537°C)
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Excellent resistance to corrosion and oxidation
The alloy is stabilized with niobium or tantalum, which prevents carbide precipitation at high temperatures, ensuring that SS 347H coils maintain both mechanical strength and corrosion resistance even in harsh environments.
Types of Stainless Steel Coils
Steel coils are generally classified based on the manufacturing process:
1. Hot-Rolled Coils
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Produced at extremely high temperatures (over 1700°F / 926°C).
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Highly formable, ideal for heavy-duty industrial applications.
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Surface is less smooth but suitable for structural uses.
2. Cold-Rolled Coils
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Hot-rolled steel is further processed at room temperature to improve precision.
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Offers smoother surface finish, tighter tolerances, and higher strength.
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Preferred where aesthetic appeal or precision is critical.
SS 347H coils are available in hot-rolled and cold-rolled forms, and can be customized in thickness, width, diameter, and surface finish to meet specific project requirements.
Key Properties of SS 347H Coils
Mechanical Properties:
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Tensile Strength: High, maintains performance under load
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Ductility & Toughness: Excellent for forming and welding
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Durability: Stable in elevated temperatures
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Creep Resistance: Ideal for prolonged high-heat applications
Physical Properties:
| Property | Value |
|---|---|
| Density | 0.285 lb/in³ at 68°F |
| Thermal Conductivity | 9.0 BTU/h·ft·°F (32–212°F) |
| Electrical Resistivity | 30.7 µΩ·in at 68°F |
| Modulus of Elasticity | 28.5 x 10⁶ psi |
| Coefficient of Thermal Expansion | 8.28 x 10⁻⁶ in/in °F (32–212°F) |
| Specific Heat | 0.1200 BTU/lb·°F |
| Melting Range | 2500–2590°F |
These properties make SS 347H coils reliable for high-stress and high-temperature industrial operations.
Applications of SS 347H Coils
SS 347H coils are versatile and used in industries requiring strength, heat resistance, and corrosion protection:
1. Agriculture
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Hot-rolled coils are used in tractors, heavy machinery, and farm equipment for structural strength.
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Cold-rolled coils serve precision agricultural parts.
2. Automotive Industry
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Interior and exterior components benefit from smooth surfaces, durability, and corrosion resistance.
3. Household Appliances
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Ideal for refrigerators, ovens, and washing machines, combining strength, shine, and dent resistance.
4. Furniture
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Cold-rolled SS 347H enhances structural integrity in furniture frames and metal components.
5. Industrial Equipment
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Hot and cold coils are used for furnace parts, oven linings, boiler baffles, and heat exchangers.
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They handle high-temperature gases and thermal cycling efficiently.
6. Aerospace and Chemical Processing
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Perfect for aircraft components, chemical reactors, and refinery equipment, where both high temperature and corrosion resistance are required.
Why Choose SS 347H Coils from Preston Pipes & Alloys?
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High-temperature and corrosion resistance for long-term performance
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Available in custom sizes, shapes, and surface finishes
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Hot-rolled and cold-rolled options for diverse industrial applications
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Expert technical support for selection, fabrication, and installation
Preston Pipes & Alloys ensures that all SS 347H coils meet stringent quality standards and are ready for deployment in industrial, automotive, agricultural, and high-precision applications.
Conclusion
SS 347H Coils are engineered for extreme conditions, combining strength, durability, corrosion resistance, and high-temperature performance. Whether for industrial machinery, automotive components, household appliances, or aerospace parts, these coils provide reliable and long-lasting performance.
Contact Preston Pipes & Alloys today to explore our full range of SS 347H coils and get expert guidance for your next project.
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