Skip to Main Content
Canadian
Canadian owned and operated

TTU937 - ER70S-2 Mild Steel TIG Welding Rod 2.5mm - 1lb Tube

Packaging: 1 lb tube
$13.78/lb $8.61/1 lb tube only $8.61/lbSave 38%

In stock

OVERVIEW

Reliable Mild Steel TIG Rods for Maintenance and Repair

For workshops, hobbyists, and maintenance departments requiring a versatile and forgiving filler metal, the ER70S-2 Mild Steel TIG Rod (2.5mm) in a convenient 1lb tube is the perfect inventory addition. Unlike standard S-6 wires, the S-2 classification represents a premium "triple deoxidized" chemistry containing Zirconium, Titanium, and Aluminum. This unique formulation makes it the go-to choice for repair jobs where base metals cannot be perfectly cleaned. Whether you are fixing agricultural equipment, automotive parts, or general structural steel that has seen better days, this rod helps ensure a sound weld without the need for excessive surface preparation.

The 1lb tube packaging is specifically designed for low-volume users or mobile welding operations. Large 10lb or 50lb boxes often lead to wasted material as unused rods sit exposed to humidity and shop dust, eventually rusting before they can be used. This compact, resealable tube keeps your filler metal clean, straight, and ready for action, ensuring you get the full value out of every purchase. It fits easily into a welding truck organizer or a small shop cabinet, making it an essential "problem solver" to keep on hand for unexpected steel repairs.

This 2.5mm (approximately 3/32") diameter rod is an excellent middle-ground size, offering enough deposition for structural joints while still being controllable at lower amperages for thinner sections. It flows smoothly and wets out evenly, providing a professional appearance that satisfies customers. By stocking this high-grade ER70S-2 rod, you provide a solution that handles the reality of real-world welding conditions—rust, mill scale, and oil—ensuring your projects hold up under pressure.

Key Benefits for the Shop

  • Waste Reduction: Small quantity packaging prevents long-term storage corrosion.
  • Versatility: One rod type handles a wide range of mild and low-alloy steels.
  • Quality Assurance: Meets AWS standards for critical applications requiring X-ray quality welds.
Additional Information
Packaging Description:1 lb tube
Weld Process:TIG
Grade:S2
Diameter:2.5mm
Packaging:1lb tube
Brand:Generic
AWS Spec :ER70S-2
Polarity:DC+, DCEN
Material Composition:Mild Steel, Triple Deoxidized
Wire Diameter:2.5mm
AWS Classification:ER70S-2
Shielding Gas Requirement:100% Argon
Packaging Type:1lb Tube
----- new values below ----
Material Composition:Mild Steel, Triple Deoxidized
Wire Diameter:2.5mm
AWS Classification:ER70S-2
Shielding Gas Requirement:100% Argon
Packaging Type:1lb Tube
Polarity:DCEN
Rod Length:36 Inches
aws-spec:er70s-2
diameter:2-5mm
grade:s2
packaging:1lb-tube
weld-process:tig
brand:generic

INCLUDED

  • 1 lb Tube of ER70S-2 Mild Steel TIG Rods (2.5mm diameter)
  • Resealable storage tube

APPLICATIONS

  • Single-pass TIG welding on mild and low-alloy steels
  • Welding on dirty, rusty, or oily surfaces where cleaning is difficult
  • Root pass welding on carbon steel pipe
  • Automotive exhaust and frame repairs
  • Maintenance and repair of agricultural equipment
  • Fabrication of pressure vessels and structural components

FAQ

ER70S-2 is 'triple deoxidized' with Aluminum, Titanium, and Zirconium, making it better suited for welding on dirty or rusty steel to prevent porosity. ER70S-6 has higher Silicon and Manganese, which makes the puddle more fluid and is generally better for clean steel, but S-2 is superior for defect prevention on imperfect surfaces.

You should use 100% Argon gas for TIG welding with ER70S-2 mild steel rods. Do not use CO2 or Argon/CO2 mixes, as those are for MIG welding.

No, ER70S-2 is strictly for mild and low-alloy carbon steels. For stainless steel, you would typically need an ER308L or ER316L rod depending on the base metal grade.

This rod is designed for DCEN (Direct Current Electrode Negative) welding. It is not typically used with AC, which is reserved for aluminum and magnesium TIG welding.

The 1lb tube is ideal for small repairs, hobbyists, or shops that don't weld mild steel TIG every day. It prevents having to buy a large bulk box that might rust before you use it all, and the resealable tube keeps the rods clean.

2.5mm is approximately 3/32 of an inch (0.098"). It is a very common size for general-purpose TIG welding on material thicknesses ranging from 1/8" to 1/4".

No, TIG welding with solid rods like ER70S-2 does not use flux. The shielding gas (Argon) protects the weld pool from the atmosphere.