AWS ER308/308H MIG & TIG Filler Rod: Complete Guide for Stainless Steel Welding

Key Features of ER308/308H Welding Wire

• Excellent corrosion resistance
  Provides strong protection against rust and chemical exposure, making it ideal for harsh industrial environments.
• High strength and durability
  Produces robust weld joints that can withstand mechanical stress and long-term usage.
• Superior weldability and arc stability
  Ensures smooth arc performance with minimal spatter, improving welding efficiency and finish.
• Smooth weld bead finish
  Delivers clean and aesthetically pleasing welds, reducing the need for post-weld finishing.
• Good oxidation resistance
  Performs well under high temperatures without losing its structural integrity.
• Suitable for MIG and TIG welding
  Offers versatility across different welding processes, making it suitable for various applications.

Chemical Composition of ER308/308H

• Chromium (Cr): 19–22%
  Enhances corrosion resistance and protects the weld from oxidation.
• Nickel (Ni): 9–11%
  Improves toughness and ensures ductility in the weld metal.
• Carbon (C): Controlled (higher in 308H)
  Higher carbon in 308H increases strength, especially at elevated temperatures.
• Other elements (Mn, Si, etc.)
  Help improve weld quality, arc stability, and overall performance.

Applications of ER308/308H Filler Rod

• Chemical & petrochemical industries
  Used in pipelines and equipment exposed to corrosive chemicals and harsh environments.
• Food processing & dairy equipment
  Ideal for hygienic applications due to its corrosion resistance and clean weld finish.
• Construction & fabrication
  Widely used in structural components requiring strength and durability.
• Shipbuilding & marine
  Performs well in moist and saline conditions, resisting corrosion effectively.
• Power plants & gas industries
  Suitable for high-temperature and pressure applications.
• Industrial machinery
  Ensures strong and reliable joints in heavy-duty equipment.

Advantages of ER308 vs ER308H

Why ER308/308H is the Preferred Choice

• Matches common stainless steels
• Strong and clean welds
• Reduced cracking risk
• Cost-effective solution
• Versatile usage across industries

Why Choose Metals and Welding Specialities?

• Premium quality products
• Strict quality control
• Wide product range
• Competitive pricing
• Reliable supply & export support

FAQ – AWS ER308/308H MIG & TIG Filler Rod

1. What is AWS ER308/308H filler wire used for?

AWS ER308/308H is used for welding stainless steel grades like 304 and 304L. It is widely applied in fabrication, chemical processing, food equipment, and structural welding applications.

2. What is the difference between ER308 and ER308H?

ER308 has lower carbon content for better general corrosion resistance, while ER308H has higher carbon, which improves strength and performance in high-temperature applications.

3. Which base materials are compatible with ER308/308H?

It is mainly used for welding 304, 304L, and similar austenitic stainless steels, ensuring strong metallurgical bonding and compatibility.

4. Can ER308/308H be used for both MIG and TIG welding?

Yes, it is suitable for both GMAW (MIG) and GTAW (TIG) welding processes, offering flexibility for different fabrication needs.

5. What industries commonly use ER308/308H filler rods?

It is widely used in food processing, dairy equipment, chemical plants, marine structures, power plants, construction, and industrial machinery manufacturing.

6. What are the key advantages of ER308/308H?

It offers excellent corrosion resistance, good weld strength, smooth arc stability, clean weld finish, and reliable performance under different working conditions.

7. Is ER308H better for high-temperature applications?

Yes, ER308H is preferred for high-temperature and high-stress environments due to its higher carbon content, which improves creep strength and durability.

8. Why choose ER308/308H over other stainless steel fillers?

It provides a balanced combination of strength, corrosion resistance, weld quality, and cost-effectiveness, making it a versatile choice for general and industrial welding applications.