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AWS A5.9 ER321
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 specialized American Welding Society (AWS) standard for a bare stainless steel filler metal, primarily known for being a "stabilized" grade.
2）Composition: The "ER321" classification indicates an austenitic stainless steel with a nominal composition of 18.5-20.5% chromium and 9.0-10.5% nickel. The key distinguishing feature is the addition of titanium (Ti), which acts as a stabilizing element.
3）Application: It is specifically designed for welding Type 321 stainless steel base metals, which are also stabilized with titanium. It can also be used for welding other austenitic stainless steels where a titanium-stabilized filler metal is required.
4）Properties: The addition of titanium is crucial because it preferentially combines with carbon, preventing the formation of chromium carbides at the grain boundaries during welding. This effectively eliminates intergranular corrosion or weld decay, making the weld highly durable in corrosive and high-temperature service environments.
5）Corrosion Resistance: This filler metal provides a weld with strong resistance to both general corrosion and localized corrosion, especially in applications that will be exposed to temperatures in the sensitization range of 425°C to 870°C (800°F to 1600°F).
6）Welding Processes: It is a versatile consumable that can be used for both Gas Metal Arc Welding (GMAW/MIG) and Gas Tungsten Arc Welding (GTAW/TIG) to achieve high-quality, stable welds.
AWS A5.9 ER321 Stainless Steel Welding Wire.pdf
Standard： AWS A 5.9 YB/T5092 | Chemical Composition % | ||||||||||||||
C | Mn | Si | Cr | Ni | P | S | Mo | Ti | |||||||
Grade ER321 | ≤0.08 | 1.0–2.5 | 0.3 – 0.65 | 18.5 – 20.5 | 9 – 10.5 | ≤0.03 | ≤0.03 | ≤0.75 | 9×C–1.00 | ||||||
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 | |||||||||||||
Mechanical Properties | Tensile Strength Mpa | Elongation after fracture A（%） | |||||||||||||
≥ 530 | ≥ 35 | ||||||||||||||
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 ER321 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 | ||||||
The key is the addition of **titanium (Ti)** to the alloy.
Titanium is a "stabilizer" because it has a stronger affinity for carbon than chromium, preventing the formation of chromium carbides and thus preventing intergranular corrosion.
ER321 contains titanium, while ER308 does not.
This makes ER321 the superior choice for applications where the welded part will be exposed to service temperatures in the **sensitization range** of 425°C to 870°C (800°F to 1600°F), as it effectively prevents weld decay.
Intergranular corrosion, or "weld decay," is a form of attack that occurs at the grain boundaries of the metal.
During welding, titanium in the ER321 filler metal combines with carbon, leaving the chromium free to provide corrosion resistance throughout the weld and the heat-affected zone.
It is the perfect choice for welding **Type 321 stainless steel**.
It can also be used for welding other austenitic stainless steels that require a titanium-stabilized filler metal for high-temperature service.
ER321 is a versatile filler metal suitable for a variety of welding methods.
It is commonly used for **Gas Metal Arc Welding (GMAW/MIG)** and **Gas Tungsten Arc Welding (GTAW/TIG)**.
The primary benefit is its outstanding resistance to intergranular corrosion.
It produces a strong, stable weld that can withstand prolonged exposure to elevated temperatures without a loss of corrosion resistance.
Yes, that is its main purpose.
The titanium stabilization ensures the weld and the heat-affected zone remain corrosion-resistant even after being subjected to temperatures up to 870°C (1600°F).
No, there is no "ER321L" designation.
The titanium in the ER321 filler metal already serves the purpose of stabilization, making the low-carbon version unnecessary.
ER321 is a staple in the **aerospace industry** for components like exhaust manifolds and jet engine parts.
It's also used in the **petrochemical industry** for equipment that operates at high temperatures.
Both are stabilized grades, but with different elements.
ER321 is stabilized with titanium, while ER347 is stabilized with niobium (columbium).
They are often used for similar applications, but ER347 is generally preferred in some pressure vessel codes.
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 good bead appearance.
Preheating is typically not required for welding with ER321 due to its high-temperature properties.
However, it is important to follow specific welding procedure specifications for your application.
An ER321 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.
While its primary use is for welding similar-composition steels, it can be used for some dissimilar welding, particularly for other austenitic grades.
However, for joining stainless steel to carbon steel, a different filler metal like ER309 is often a better choice.
The weld metal from ER321 is designed to contain a small, controlled amount of **delta ferrite**.
This ferrite helps to prevent solidification cracking, which is a common issue in fully austenitic welds.
The titanium stabilization prevents carbide precipitation at the high operating temperatures of exhaust systems.
This ensures that the weld joints remain strong and corrosion-resistant, even with repeated thermal cycling.
Both are excellent stabilized grades. The choice often comes down to the specific application and industry preference.
ER347, stabilized with niobium, is sometimes preferred for pressure vessels and nuclear applications due to its higher creep strength.
ER321Si is a high-silicon version of ER321.
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.
