Is SA517 Grade E resistant to corrosion?

SA517 Grade E is a high-strength alloy steel plate subjected to quenching and tempering treatment. It is primarily utilized in the fabrication of pressure vessels and boilers, boasting excellent toughness and weldability, and is well-suited for low-temperature and high-pressure service environments.

Applications

Petrochemical Industry: Hydrocracking reactors, catalytic reforming reactors, desulfurization towers, heat exchangers, and hydrocarbon storage tanks.

Natural Gas Industry: Gas dehydration towers, compression system pressure vessels, wellhead manifolds, LNG auxiliary heat exchangers, and gas storage tanks.

Power Generation Sector: Boiler drums, header pipes, superheater/reheater tubes, waste heat recovery boiler pressure parts, and solar thermal power storage tank shells.

Offshore Engineering: Subsea wellhead Christmas trees, offshore platform topside pressure vessels, riser supports, and offshore pipeline pig launchers/receivers.

Nuclear & Aerospace Fields: Nuclear power coolant storage tanks, pressure buffer vessels, aerospace ground high-pressure gas storage tanks, and rocket fuel filling vessels.

Heavy Industry & Industrial Safety: Metallurgical waste heat boiler pressure parts, heavy machinery hydraulic cylinders, accumulator shells, and industrial fire suppression pressure vessels (CO₂, high-pressure water).

Application Conditions

Petrochemical Industry: Operating temperature -20℃ to 550℃, working pressure up to 15MPa; resistant to hydrogen embrittlement, hydrocarbon corrosion, and cyclic pressure fluctuations; suitable for crude oil refining and chemical intermediate synthesis processes.

Natural Gas Industry: Working pressure 8MPa to 20MPa, temperature range -40℃ to 400℃; excellent resistance to marine atmospheric corrosion and natural gas impurities; adaptable to onshore and subsea gas transmission and purification.

Power Generation Sector: High-pressure steam environment (up to 25MPa), temperature up to 580℃; resistant to cyclic thermal stress and high-temperature erosion; suitable for thermal, combined cycle, and solar thermal power plants.

Offshore Engineering: Working pressure 10MPa to 25MPa, temperature -30℃ to 450℃; withstanding salt spray corrosion, high humidity, and wave impact loads; compliant with offshore industrial anti-corrosion and structural strength standards.

Nuclear & Aerospace Fields: Temperature -50℃ to 500℃, working pressure up to 30MPa; strict structural integrity and safety standards; resistant to radioactive medium corrosion (nuclear field) and high-purity media compatibility (aerospace field).

Heavy Industry & Industrial Safety: High-temperature flue gas environment (up to 600℃), working pressure 5MPa to 12MPa; resistant to mechanical impact and cyclic load; suitable for harsh industrial and emergency safety scenarios.

Processes Adopted for SA517 Grade E

Steelmaking: Smelting & Refining: Adopts electric arc furnace (EAF) smelting combined with ladle refining (LF) and vacuum degassing (VD) processes. Strictly controls chemical composition, reduces harmful impurities (S, P ≤ 0.015%), and ensures uniform material purity and microstructure.

Hot Rolling: Controlled Forming: Implements controlled rolling technology at 1100–1200℃, with multi-pass rolling and precise temperature control. Optimizes grain refinement, improves material tensile strength and toughness, and ensures consistent thickness and surface quality of steel plates.

Heat Treatment: Normalizing & Tempering: Applies standard normalizing + tempering heat treatment. Normalizing at 890–920℃ for uniform austenitization, followed by air cooling; tempering at 620–680℃ to eliminate residual stress, adjust hardness (22–28 HRC), and balance mechanical properties.

Welding: Controlled Temperature & Annealing: Suitable for gas metal arc welding (GMAW), shielded metal arc welding (SMAW) and submerged arc welding (SAW). Requires preheating at 100–150℃, interpass temperature control ≤ 300℃, and post-weld stress relief annealing to ensure high-quality weld joints.

Cutting & Forming: Low-Deformation Processing: Compatible with oxy-fuel cutting, plasma cutting and laser cutting. Supports cold/hot forming (bending, rolling) at room temperature to 300℃, with minimal deformation and no obvious material embrittlement after processing.

Surface Treatment: Anti-Corrosion Preparation: Uses shot blasting and pickling processes to remove oxide scales and rust. Ensures good surface adhesion for subsequent anti-corrosion coating, enhancing resistance to industrial and marine corrosion.

Contact now

For more details about GNEE's steel products, contact us at beam@gneesteelgroup.com. We look forward to working with you.

What machining processes are suitable for SA517 Grade E?

It can be machined via turning, milling, drilling, and grinding. Using high-speed steel or carbide tools with proper cutting fluids is recommended to ensure machining efficiency and surface quality.

What is the delivery condition of SA517 Grade E?

It is delivered in the quenched and tempered (Q&T) condition. This ensures consistent mechanical properties, including high strength and toughness, meeting the requirements of pressure vessel applications.

What standards should be followed for SA517 Grade E welding?

Welding should follow ASME Section IX (Welding Qualifications) and AWS D1.1 (Structural Welding Code - Steel). Proper electrode selection (e.g., E11018-G) and process control are essential for quality welds.

What is the maximum operating temperature for SA517 Grade E?

Its maximum continuous operating temperature is around 450°C (842°F). Exceeding this temperature may cause a decrease in strength and toughness over time.

Is SA517 Grade E a carbon steel or alloy steel?

It is a low-alloy steel. Unlike carbon steel, it contains alloying elements (Cr, Mo, Ni) that enhance its strength, toughness, and heat resistance for high-pressure applications.

What is the elongation requirement of SA517 Grade E?

The minimum elongation at break is 16% (in 50 mm gauge length). This ductility ensures the material can deform plastically before fracture, enhancing structural safety.

What is the thermal conductivity of SA517 Grade E?

At room temperature, its thermal conductivity is about 45 W/(m·K) (26 Btu/(ft·h·°F)). This property is crucial for heat transfer calculations in boiler and heat exchanger designs.

What is the coefficient of thermal expansion of SA517 Grade E?

The linear thermal expansion coefficient is approximately 11.5 × 10⁻⁶/°C (6.4 × 10⁻⁶/°F) between 20°C and 600°C. It helps predict thermal deformation in high-temperature applications.

What is the reduction of area requirement for SA517 Grade E?

The minimum reduction of area is 40%. This parameter reflects the material's ability to deform uniformly under tension, indicating good ductility and toughness.