What wire diameter is the Harris 312 Stainless Steel MIG Welding Wire (ER312) available in?

The Harris 312 Stainless Steel MIG Welding Wire (ER312) is available in .035, .045 diameter. Wire diameter selection depends on base metal thickness and travel speed requirements: .023 in suits thin sheet metal (up to 3/16 in), .030 in is versatile for 1/8–1/4 in, .035 in is the most common all-purpose diameter for 3/16–1/2 in steel, and .045 in or larger suits heavy plate and high-deposition applications.

What shielding gas or flux type does the Harris 312 Stainless Steel MIG Welding Wire (ER312) require?

Stainless steel MIG wire typically uses 98% Ar/2% O2 or tri-mix (He/Ar/CO2) shielding gas. For Harris 312 Stainless Steel MIG Welding Wire (ER312): AWS ER312 applications — 308L suits 304/308 stainless; 309L suits dissimilar metal joints; 316L adds molybdenum for corrosion resistance in marine and chemical environments; 317L provides higher molybdenum content than 316L. Always use the correct filler alloy for your base metal to maintain corrosion resistance across the weld zone.

What is the deposit strength of the Harris 312 Stainless Steel MIG Welding Wire (ER312)?

For ER312: Deposit tensile strength for mild steel solid MIG wire (ER70S-x) is approximately 70,000 PSI (483 MPa) minimum. For stainless filler metals, the deposit strength matches the base alloy grade. For flux-core wires, strength and chemistry vary by classification — refer to the AWS classification on the package for the exact mechanical property requirements.

What spool size is the Harris 312 Stainless Steel MIG Welding Wire (ER312) available in?

The Harris 312 Stainless Steel MIG Welding Wire (ER312) is available in 25 lb spool/coil sizes. Smaller spools (2 lb, 10 lb) fit most hobby and light commercial feeders. Larger spools (33 lb, 44 lb) are standard for production welders with 12 in spool capacity. Drums and coils (250–600 lb) are used with bulk drum feeders for robotic and high-production applications.

How should I store the Harris 312 Stainless Steel MIG Welding Wire (ER312) to prevent weld quality issues?

Store MIG wire in a clean, dry location away from humidity. Moisture absorption causes porosity in the weld — mild steel wire is particularly susceptible. If wire has been exposed to moisture, it may show surface rust; lightly rusted wire can sometimes be used but should be wiped before feeding. Flux-core and low-hydrogen electrodes require stricter moisture control than solid wire. Keep spools in their original packaging or sealed containers with desiccant packets when not in use.

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Harris ER312 Stainless MIG Wire

SKU: 00312F8

$579.01 ~~$860.00~~

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Overview

Harris 312 (AWS ER312) is a high-ferrite stainless MIG welding wire designed for joining dissimilar stainless and carbon steels, hardfacing, and tool/die repair. Excellent crack resistance. Select your diameter and package size from the dropdown.

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