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Stainless Steel Welding Wire GJ-ER347
GJ-ER347

Stainless Steel Welding Wire GJ-ER347

Copper-Free Solid Wire
(18Cr-10Ni-Nb stabilized austenitic)

  • AWS A5.9 ER347
  • EN ISO 14343-A-G 19 9 Nb

Product description

GJ-ER347 is an 18% chromium - 10% nickel niobium-stabilized austenitic stainless steel solid wire strictly complying with AWS A5.9 ER347. Niobium (columbium) stabilizes the weld metal against chromium carbide precipitation, providing excellent intergranular corrosion resistance in elevated-temperature service.

Key Advantages

  • 01GUJIN

    Niobium Stabilization: Nb content (8xC min to 1.0%) ties up carbon, preventing chromium carbide precipitation and sensitization.

  • 02GUJIN

    Elevated Temperature Service: Stabilized microstructure provides good strength and corrosion resistance at temperatures up to 800C.

  • 03GUJIN

    No PWHT Required: Unlike non-stabilized grades, ER347 welds maintain corrosion resistance in the as-welded condition without post-weld heat treatment.

Application Guide

  • With Ar+2%O2 shielding: For welding 347/321 stainless in boiler superheaters, heat exchangers, and high-temperature piping.

  • With 98%Ar+2%CO2: For welding stabilized stainless in chemical processing, petroleum refining, and power generation equipment.

  • For elevated temperature service: Suitable for components operating at 400-800C where stabilized chemistry is critical for long-term integrity.

Main constituents

Elements

C
(Carbon)

Si
(Silicon)

Mn (Manganese)

Cr
(Chromium)

Ni (Nickel)

Nb (Niobium)

S
(Sulfur)

P
(Phosphorus)

AWS Requirement

<=0.08

0.30 - 0.65

1.0 - 2.5

19.0 - 21.5

9.0 - 11.0

8xC min - 1.0

<=0.030

<=0.030

Typical Actual Value

0.05

0.45

1.70

20.0

10.0

0.60

0.008

0.015

Typical Mechanical Properties of Deposited Metal

Mechanical properties tested as all-weld metal with Ar+2%O2 shielding gas (DC+). AWS A5.9 does not specify minimum mechanical properties for austenitic stainless wires; values shown are industry typical results.

 

Test Item

Yield Strength

Tensile Strength

Elongation

Ferrite Number

AWS A5.9 Requirement

--

--

--

5 - 10 FN

Typical Actual Result

400 MPa

600 MPa

35%

7 FN

Reference Welding Parameters

Wire Diameter

0.8 mm (0.030")

1.0 mm (0.040")

1.2 mm (0.045")

1.6 mm (1/16")

Amperage

60 - 150

80 - 200

100 - 280

140 - 350

Voltage

18 - 22

20 - 26

22 - 30

24 - 34

WHY US

Consistent Quality, Direct Factory Pricing.

  • TECHNOLOGY
    GUJIN

    TECHNOLOGY

    100% batch consistency ensured by our advanced in-house QA lab.

  • EXPERIENCE
    GUJIN
    20
    +

    EXPERIENCE

    20+ years mastering SAW metallurgical synergy for heavy industries.

  • OEM SERVICE
    GUJIN

    OEM SERVICE

    Full OEM empowerment, from custom formulations to private labeling.

  • MANUFACTURING SCALE
    GUJIN

    MANUFACTURING SCALE

    Massive automated capacity to stabilize your bulk supply chain.

  • GLOBAL TRUST
    GUJIN

    GLOBAL TRUST

    Long-term partner to hundreds of industrial conglomerates worldwide.

FAQ

How do you prevent the agglomerated flux from absorbing moisture during long-distance sea freight?

Moisture control is critical for submerged‑arc welding fluxes. Our standard packaging is 25‑kilogram multi‑layer kraft paper bags lined with heavy‑duty moisture‑proof plastic bags. For extreme environments or ultra‑low hydrogen requirements (such as H5 grade), we can also provide custom heavy‑duty aluminium foil vacuum packaging. All goods are stacked on wooden pallets and tightly wrapped with multiple layers of industrial shrink film to ensure 100% dryness upon arrival at the port.

We are fabricating API 5L X70 pipes. Can we use standard neutral fluxes like GJ-301?

No. For High-Grade Oil & Gas pipeline fabrication (such as API X60 to X70), standard neutral fluxes like 301 or active fluxes like 501 are not suitable, as they cannot guarantee the required extreme low-temperature impact toughness. You must use our dedicated pipeline-grade Fluoride-Basic agglomerated flux, GJ-101Q (or GJ-101G), combined with Mo/Ni-alloyed wires (e.g., EA2 or S3Ni1Mo).This combination ensures zero loss of alloying elements and guarantees impact values of ≥27J(or much higher) at -40°C to -50°C.

What is your minimum order quantity (MOQ) and typical delivery time for a 20ft container?

Our standard MOQ for international orders is normally 5 tons per item. For a full 20‑foot FCL container, the loading capacity is usually 24 tons subject to container space constraints, and it can reach 27 tons without pallets. A 40HQ high‑cube container can hold a maximum of 28 tons. Backed by our robust production capacity, we can finish production, quality inspection and packaging within 7‑10 days upon receiving the deposit, and deliver the goods to major Chinese ports such as Qingdao Port or Tianjin Port.

Our workshop wants to save time and energy. Is there a way to use the agglomerated flux directly without the re-baking process?

Yes! We fully understand that re-baking costs time and electricity. For customers who want to skip this step, we highly recommend selecting our Heavy-Duty Aluminum Foil Vacuum Packaging. The flux is vacuum-sealed immediately after high-temperature manufacturing. When you open the bag in your workshop, the flux is in a 100% factory-dry state and can be poured directly into the welding hopper for immediate use.

Our steel plates have light rust and mill scale, and we cannot perfectly sandblast all of them before welding. Which flux can prevent porosity in this situation?

For structural steel with surface impurities like rust, oil, or mill scale, standard neutral or high-basic fluxes will likely cause porosity. You need our GJ-501A (Aluminate-Rutile Active Flux). It features a highly active deoxidizing slag system that offers exceptional tolerance to surface contaminants. This allows you to achieve flawless, X-ray quality welds at high speeds without rigorous pre-weld grinding, significantly boosting your shop floor efficiency.

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