Carbon Steel TIG Rods
BLUME® ER70S-3 (TIG)
BLUME® ER70S-3 (TIG)
Specification: ASME SFA/AWS A5.18 ER70S-3
Clean, Consistent, and Dependable Performance
Experience precision and versatility with BLUME® ER70S-3 TIG Rods — the professional’s choice for clean, smooth welds on mild and low-alloy steels. Engineered to deliver stable arcs, low spatter, and minimal oxidation, this filler metal ensures a bright, clean finish where surface conditions are well-prepared.
BLUME® ER70S-3 is ideal for automotive, piping, pressure vessels, and general fabrication, offering controlled puddle flow and excellent mechanical strength across a wide range of applications.
If your welding standards demand precision, consistency, and flawless finish, BLUME® ER70S-3 delivers every time.
BLUME® ER70S-3 vs Standard ER70S-3

Key Features
Key Features
✅ Excellent arc stability for precise TIG control and minimal spatter
✅ Clean, bright weld appearance with low fume generation
✅ Balanced deoxidizers for use on clean and lightly oiled surfaces
✅ Smooth wetting action for uniform bead formation
✅ High tensile strength and impact toughness for durable welds
✅ Ideal for thin to medium-gauge steel welding
Recommended Application
Recommended Application
✔ Automotive components and frames
✔ General fabrication and light manufacturing
✔ Pressure vessels and pipe welding
✔ Sheet metal and structural steel
✔ Machinery and equipment repair
✔ Clean carbon steel welding applications
Product Data Sheet
Product Data Sheet
FAQ
FAQ
Q: What is BLUME® ER70S-3 TIG Rod designed for?
A: It’s designed for TIG welding of clean, low-carbon and mild steels, ideal for fabrication, automotive, and structural applications requiring smooth, clean welds.
Q: How does ER70S-3 differ from ER70S-6?
A: ER70S-3 contains less deoxidizers, making it perfect for clean base metals where high-silicon ER70S-6 may cause excessive fluidity or silicon islands.
Q: What shielding gas is recommended?
A: Use 100% Argon for TIG welding to achieve optimal arc stability and bead appearance.
Q: Can it be used on rusty or contaminated surfaces?
A: It performs best on clean or lightly oiled surfaces. For rusted or scaled steel, BLUME® ER70S-6 is recommended.
Q: Why choose BLUME® over other ER70S-3 wires?
A: BLUME® TIG rods are precision-drawn and triple-cleaned, ensuring better arc initiation, smoother feed, and superior finish, reducing rework and improving overall productivity.