STAVINOX 347 / 347H

ER347/347H stainless steel filler materials are made for welding stabilised austenitic stainless steels in high-temperature and corrosive service. They work with both MIG and TIG welding and are widely used in pipe, plate and vessel fabrication. Thanks to niobium stabilisation, 347 filler wire keeps strong corrosion resistance at service temperatures and gives dependable weld quality in demanding industrial applications.

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Key Features and Benefits of 347/347 H

Stanvac International developed ER347/347H welding consumables for industries where heat resistance and corrosion protection are critical.

Niobium-stabilised weld metal: Niobium stabilisation stops carbide precipitation, so corrosion resistance holds up at elevated service temperatures.
High resistance to corrosive media: Performs well in aggressive environments where welded joints meet heat and corrosive substances.
Strong mechanical properties: Good yield strength, tensile strength and elongation give durable, long-lasting weld joints.
Suitable for high temperature service: Made for applications where stainless steel components work under sustained heat.
Stable arc and smooth metal transfer: Precision layer-wound wire feeds consistently and keeps the arc stable in MIG welding.
MIG and TIG welding flexibility: Offered as MIG wire and TIG rod, so the process can be chosen to suit the job.
Wide application range: Often used for welding 321H, 347H and similar austenitic stainless steel grades.

These strengths make ER347 filler wire and ER347 H filler wire dependable choices for critical stainless steel welding.

Specifications of ER347/347 H

The main mechanical properties and welding conditions for 347 filler wire and the TIG rod variants are shown here.

Product Name	AWS/SFA	Yield Strength N/mm2	Tensile Strength N/mm2	Elongation A5	Impact Energy ISO-V(J) 20° C	Welding Conditions
STAVINOX MIG 347/347H	AWS A5.9: ER 347/347H EN ISO 14343-A: G 19 9 Nb	≥ 400	≥ 550	≥30	≥ 65	DC (+)
STAVINOX TIG 347	ER 347	≥ 400	≥ 550	≥ 30	≥ 65	DC (-)

STAVINOX MIG 347/347H - TYPE OF PACKING :

SD 300 / BS 300	11.34 Kgs/ 25 Lbs, 15 Kgs/ 30 Lbs/ 33lbs Layer Wound Plastic/ Metallic Spool.
SD 200	4.54 Kgs/ 10 Lbs Layer Wound Plastic Spool.
SD 100	0.700 Kgs/0.910 /2 lbs Layer Wound Plastic Spool.
Mig Wire in Drum	In Drums of 100-250 Kgs (200-550 Lbs)

STAVINOX TIG 347 - TYPE OF PACKING : Supplied in fibre/plastic tubes of 5kg/ 10lbs; bulk quantities are also available.

These specifications support consistent welding performance in fabrication and pressure equipment applications.

Properties of ER347/347 H

ER347/347 H welding consumables are engineered for dependable performance in high-temperature service.

Property	Description
Intergranular Corrosion Resistance	Niobium stabilisation restricts carbide formation
Mechanical Strength	Weld metal that is both strong and ductile
High Temperature Stability	Properties are retained at elevated service temperatures
Arc Stability	A smooth, controlled arc while welding
Weld Appearance	Even bead shape with a good surface finish
Feeding Performance	Precision layer winding gives steady feeding
Process Compatibility	Works with MIG and TIG welding processes

These properties help secure joint integrity over time under demanding operating conditions.

Applications of ER347/347 H

347 filler wire and TIG rods see wide use in industries where stainless steel components are exposed to heat and corrosive environments.

Typical applications include:

Fabrication of stainless steel pipes
Welding of pressure vessels and storage tanks
Plate and vessel fabrication in process industries
Petrochemical and refinery equipment
Components for the power and energy sector
Chemical processing plants

It is particularly well suited to applications where corrosion resistance has to be preserved at service temperatures.

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STAVINOX 347 / 347H