What diameter is the Harris ER70S-3 Mild Steel TIG GTAW Welding Rod 1/16 10LB Box - E70S330 available in, and how do I choose the right size?

The Harris ER70S-3 Mild Steel TIG GTAW Welding Rod 1/16 10LB Box - E70S330 is available in 1/16 diameter. Rod diameter selection depends on the base metal thickness and the amperage being used: 1/16 in (1.6 mm) rods suit light gauge up to 3/16 in at 60–130A; 3/32 in (2.4 mm) rods cover 3/16 in–1/2 in material; 1/8 in (3.2 mm) rods are used for heavier sections at 130–250A+. As a general rule, rod diameter should be close to or slightly smaller than base metal thickness.

What shielding gas should I use with the Harris ER70S-3 Mild Steel TIG GTAW Welding Rod 1/16 10LB Box - E70S330?

TIG welding shielding gas selection: use pure argon (99.995% purity) for most TIG applications including steel, stainless, aluminum, and titanium. Helium additions (25–75% He/Ar mix) increase heat input and travel speed for heavy section work and aluminum welding where higher deposition is needed. Never use CO2 or mixed gases designed for MIG welding in TIG torches.

What is the AWS classification of the Harris ER70S-3 Mild Steel TIG GTAW Welding Rod 1/16 10LB Box - E70S330?

TIG filler rods carry an AWS classification (e.g., ER70S-2 for mild steel, ER308L for 304 stainless, ER4043 for aluminum) that specifies the chemical composition and mechanical properties of the deposited weld metal. Always verify the AWS class when writing or qualifying a Welding Procedure Specification (WPS) for code work.

Harris ER70S-3 Mild Steel TIG GTAW Welding Rod 1/16 10LB Box - E70S330

Q: What is the Harris ER70S-3 Mild Steel TIG GTAW Welding Rod 1/16 10LB Box - E70S330 used for?

TIG (GTAW) filler rods are used in the gas tungsten arc welding process, where the welder manually feeds the rod into the weld pool while maintaining the arc with the torch. TIG welding produces the highest quality, lowest spatter welds and is the process of choice for precision work on stainless, aluminum, titanium, and exotic alloys.

SKU: E70S330

$56.14 ~~$84.00~~

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ER70S-3 mild steel TIG (GTAW) welding rod 1/16 x 36 in. x 10 lb. box

Overview

Harris ER70S-3 Mild Steel TIG GTAW Welding Rod 1/16 10LB Box - E70S330

ER70S-3 mild steel TIG (GTAW) welding rod is a general purpose welding alloy for fabrication of mild steel. It contains silicon and manganese as deoxidizers. Usually used with 75/25 argon/carbon dioxide or with higher contents of argon, such as 90/10. It can also be used with 100% carbon dioxide. Qualified to AWS A5.18 ER70S-3.

Features

General-purpose TIG (GTAW) welding rod for fabrication of mild steel
Contains silicon and manganese as deoxidizers
Good out-of-position welding using short circuiting transfer with 90% argon/10% carbon dioxide
Performance is good over mill scale and rust using carbon dioxide
Marked with model number on each end for easy identification after use
Conforms to AISI/AWS A5.18 & ASME SFA 5.18 ER 70S-3

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