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AWS A5.9 ER347
1kg,5kg,15kg,20kg
1lb;2lb;4.5lb;11lb;15lb;20lb;33lb;44lb
0.6mm;0.8mm;0.9mm;1.0mm;1.2mm;1.6;2.0mm
0.023;0.030in;0.035in;3/64″;0.045;1/16″;5/64″
1.6mm,2.0mm,2.4mm,3.2mm,4.0mm,5.0mm
1/16 ″in;5/64″in;3/32″in;1/8″in;5/32″inch
D100,D200,D270,D300,BS300,K300
Acceptable (design the pack with your logo)
15 Days
Product Description
1）Classification: This is a stabilized, bare stainless steel filler metal under the American Welding Society (AWS) A5.9 specification.
2）Composition: The "ER347" classification denotes a chromium-nickel stainless steel with a nominal composition of 19-21.5% chromium and 9-11% nickel. Its key feature is the addition of niobium (also known as columbium) as a stabilizing element.
3）Application: Its main use is for welding similar-composition base metals, such as Type 347 and 321 stainless steels. It's particularly effective for welding these grades where the welded parts will be exposed to high service temperatures.
4）Properties: The niobium in the alloy prevents the formation of chromium carbides during the welding process. This is crucial for eliminating intergranular corrosion (also called weld decay) and maintaining the weld's integrity in corrosive and high-temperature environments.
5）Versatility: It's an excellent choice for applications requiring good resistance to general corrosion and superior strength at elevated temperatures, with a service temperature range typically between 425°C to 870°C (800°F to 1600°F).
6）Welding Processes: This is a versatile consumable that works well with multiple welding methods, including Gas Metal Arc Welding (GMAW/MIG), Gas Tungsten Arc Welding (GTAW/TIG), and submerged arc welding.
AWS A5.9 ER347 Stainless Steel Welding Wire.pdf
Standard： AWS A 5.9 YB/T5092 | Chemical Composition % | ||||||||||||||
C | Mn | Si | Cr | Ni | P | S | Mo | Nb | |||||||
Grade ER347 | ≤0.08 | 1.0–2.5 | 0.3 – 0.65 | 19 – 21.5 | 9 – 11 | ≤0.03 | ≤0.03 | ≤0.75 | 10×C–1.0 | ||||||
Type | Spool (MIG) | Tube (TIG) | |||||||||||||
Specification ( MM ) | 0.8、0.9、1.0、1.2、1.6、2.0 | 1.6、2.0、2.4、3.2、4.0、5.0 | |||||||||||||
Package | S100/1kg S200/5kg S270,S300/15kg-20kg | 5kg/box 10kg/box length :1000MM | |||||||||||||
Diameter（MM） | 0.8 | 1.0 | 1.2 | 1.6 | 2.0 | 2.5 | 3.2 | ||||||||
Current （A） | 70 ~ 150 | 100 ~ 200 | 140 ~ 220 | 50 ~ 100 | 100 ~ 200 | 200 ~ 300 | 300 ~ 400 | ||||||||
AWS A5.9 ER347 Stainless Steel Welding Wire Parameters
| Diameter | Process | ||
| in | mm | ||
| 0.03 | 0.8 | GMAW | |
| 0.035 | 0.9 | GMAW | |
| 0.039 | 1.0 | GMAW | |
| 1/25.4” | |||
| 0.045 | 1.2 | GMAW | |
| 3/64” | |||
| 1/16” | 1.6 | GMAW | |
| 3/32” | 2.4 | GMAW | |
| Diameter | Process | ||
| in | mm | ||
| 1/16” | 1.6 | GTAW | |
| 3/32” | 2.4 | GTAW | |
| 1/8” | 3.2 | GTAW | |
| 5/32” | 4.0 | GTAW | |
| 3/16” | 4.8 | GTAW | |
| Weight | 0.5kg | 1kg | 2kg | 5kg | 15kg | 20kg | |||||
| 1 lb | 2 lb | 4 lb | 11 lb | 33 lb | 44 lb | ||||||
AWS A5.9 ER347 is a "stabilized" stainless steel filler metal.
It is primarily known for its exceptional resistance to intergranular corrosion, which is achieved through the addition of niobium.
The term "stabilized" refers to the addition of a key alloying element, in this case, **niobium (columbium)**.
Niobium has a stronger affinity for carbon than chromium, preventing the formation of chromium carbides and thus "stabilizing" the alloy's corrosion resistance.
Its primary use is for welding similar-composition stainless steels, such as **Type 347 and 321**.
It is the filler metal of choice for applications that involve exposure to high service temperatures, particularly in the sensitization range.
Intergranular corrosion, or "weld decay," is a form of localized corrosion that occurs when heat causes chromium to combine with carbon.
The niobium in ER347 combines with carbon during welding, leaving the chromium free to provide continuous corrosion resistance throughout the weld and heat-affected zone.
ER347 has a nominal composition of **19-21.5% chromium** and **9-11% nickel**.
The essential element that sets it apart is the controlled addition of niobium, which acts as the stabilizing agent.
Both are stabilized grades, but ER347 uses **niobium**, while ER321 uses **titanium**.
While they are often used for similar applications, ER347 is generally preferred in pressure vessel codes and for higher-strength applications due to the effects of niobium.
ER347 is a highly versatile filler metal that is compatible with multiple welding methods.
It is commonly used for **Gas Metal Arc Welding (GMAW/MIG)**, **Gas Tungsten Arc Welding (GTAW/TIG)**, and submerged arc welding.
The primary benefits are its outstanding resistance to intergranular corrosion and its superior strength at elevated temperatures.
It produces a strong, stable weld that is ideal for critical applications.
Yes, that is its main purpose.
The niobium stabilization ensures the weld and the heat-affected zone maintain their corrosion resistance even after prolonged exposure to temperatures in the range of 425°C to 870°C (800°F to 1600°F).
No, there is no "ER347L" designation.
The niobium in the ER347 filler metal already performs the role of stabilization, making a low-carbon version unnecessary for preventing weld decay.
ER347 is a staple in the **power generation and nuclear industries** for its high-temperature strength and stability.
It's also widely used in the **aerospace** and **petrochemical industries** for fabricating equipment like boiler tubing and exhaust systems.
While its primary use is for welding similar-composition steels, it can be used for some dissimilar welding, particularly to other austenitic grades.
For welding stainless steel to carbon steel, however, a filler metal like ER309 is often a more appropriate choice.
The niobium content increases the creep strength of the weld deposit, making it an excellent choice for applications that are under constant stress at elevated temperatures.
It maintains its mechanical integrity better than unstabilized grades.
For Gas Metal Arc Welding (MIG), a shielding gas mixture of **98% argon and 2% carbon dioxide** is a common and effective choice.
This combination provides a stable arc and a high-quality weld bead.
Preheating is generally not required for welding with ER347.
However, for very thick sections or in cold conditions, a mild preheat might be considered to manage heat input and reduce the risk of cracking.
An ER347 weld deposit provides a strong and durable joint with a typical tensile strength of around **80,000 psi (550 MPa)**.
It offers good ductility and toughness, even at high service temperatures.
To prevent contamination and moisture absorption, the wire must be stored in a **clean, dry, and cool environment**.
It is crucial to keep spools in their original sealed packaging until use.
The weld metal from ER347 is designed to contain a small, controlled amount of **delta ferrite**.
This ferrite helps to prevent solidification cracking, which can be a common issue in fully austenitic welds.
Choose **ER347** when the welded part will be exposed to sustained high temperatures where weld decay is a concern.
Use **ER308L** for general-purpose welding of stainless steels where high-temperature service is not the primary factor.
ER347Si is a high-silicon version of ER347.
The higher silicon content provides better weld puddle fluidity and arc stability, making it an excellent choice for MIG welding applications where a smooth, cosmetic bead is desired.
