SS 347 / 347H Fasteners Supplier & Exporter for Global Industrial Markets

SS 347 / 347H Fasteners Supplier & Exporter for Global Industrial Markets

Aurum Overseas is a trusted supplier and exporter of SS 347 / 347H fasteners for high-temperature processing systems, pressure vessels, refinery infrastructure, and corrosive industrial environments. These stabilized grades are selected where elevated temperatures, thermal cycling, and intergranular corrosion can affect conventional stainless steel fasteners.

SS 347 provides stabilized corrosion resistance and thermal performance, while SS 347H offers improved creep strength and high-temperature mechanical stability. They are widely used in refineries, petrochemical plants, boilers, heat exchangers, pressure piping, and thermal processing systems.

Aurum Overseas supplies SS 347 / 347H fasteners to major international markets including the USA, Canada, Mexico, UAE, Saudi Arabia, Germany, France, Italy, Spain, Netherlands, Qatar, and Oman, supporting EPC contractors, manufacturers, distributors, and industrial buyers with reliable export supply.

Chemical and Mechanical Properties of SS 347 Fasteners

SS 347 / 347H combines a chromium-nickel composition with niobium for improved high-temperature stability and resistance to chromium carbide formation during welding and thermal exposure.

Chemical Composition of SS 347 / 347H Fasteners

Mechanical Properties of SS 347 / 347H Fasteners

The combination of oxidation resistance, thermal stability, and corrosion performance makes these fasteners suitable for pressure systems and high-temperature industrial processing.

Intergranular Corrosion, Oxidation and Thermal Fatigue

SS 347 / 347H fasteners provide excellent resistance to intergranular corrosion where carbide precipitation can weaken conventional stainless steel. Niobium stabilization helps prevent sensitization during welding and prolonged thermal exposure.

These fasteners also provide strong oxidation resistance under cyclic heating in boilers, heat exchangers, thermal plants, and petrochemical systems. SS 347H offers additional creep resistance and thermal strength for sustained high-temperature pressure applications.

ASTM, ASME and EN Standards

SS 347 / 347H fasteners supplied by Aurum Overseas comply with major international standards used for refinery systems, pressure equipment, thermal processing, and industrial engineering projects.

Compliance with ASTM, ASME, EN, and refinery engineering specifications supports international industrial procurement and pressure-equipment requirements.

Manufacturing Range, Threads and Product Types

SS 347 / 347H fasteners are manufactured from M3 to M56 and above for refinery systems, pressure vessels, boilers, thermal plants, and industrial piping. Metric, UNC, and UNF thread systems are available for global assembly requirements.

The product range includes bolts, nuts, screws, washers, stud bolts, threaded rods, anchor fasteners, and custom-machined components. Custom manufacturing is also available for project-specific dimensions, machining tolerances, and specialized fastening requirements.

Refineries, Pressure Vessels and Thermal Processing Applications

SS 347 / 347H fasteners are widely used in refinery and petrochemical systems where thermal exposure, oxidation, and pressure conditions require stabilized stainless steel fastening solutions. Applications include pressure vessels, piping systems, boilers, heat exchangers, and thermal reactors.

Thermal processing industries use these grades in furnaces, combustion systems, heat-treatment plants, industrial heating equipment, steam systems, and power-generation infrastructure requiring high-temperature stability and creep resistance.

Global Export Markets

Aurum Overseas supplies SS 347 / 347H fasteners to major industrial and engineering markets worldwide.

Quality Testing, PMI and Material Certification

All SS 347 / 347H fasteners are supplied with EN 10204 3.1/3.2 certification for material traceability and international industrial compliance. Quality procedures include PMI testing, dimensional inspection, hardness testing, and mechanical verification.

Third-party inspection can also be arranged according to refinery, EPC, pressure-equipment, and industrial project requirements.

Export Packaging and Delivery Standards

SS 347 / 347H fasteners are packed using export-grade protective materials to prevent contamination, moisture exposure, and transit damage during international transportation. Packaging includes VCI protection, export cartons, and fumigated wooden crates.

Proper labeling, heat-number traceability, and export documentation support smooth customs clearance and reliable international delivery.

Why Industrial Buyers Choose Aurum Overseas

Aurum Overseas supplies stabilized stainless steel fastening solutions for refinery systems, thermal processing, pressure equipment, and industrial engineering applications. Our expertise in high-temperature metallurgy and industrial corrosion environments supports EPC contractors, refinery operators, engineering firms, and industrial buyers.

With a focus on certified quality, export reliability, technical expertise, and procurement support, Aurum Overseas delivers dependable fastening solutions for demanding elevated-temperature environments.

SS 347 / 347H vs SS 410 Fasteners for High Temperature Applications

SS 347 / 347H fasteners suit high-temperature applications requiring intergranular corrosion resistance, thermal stability, and reliable performance in refineries, pressure vessels, and heat exchangers.

Where hardness and wear resistance are the priority, SS 410 Fasteners Supplier offers suitable martensitic stainless steel fastening solutions for valves, pumps, machinery, and thermal equipment.

FAQs – SS 347 / 347H Fasteners