1.2mm SM-3A NST MIG WIRE [12.5kg]

Name: 1.2mm SM-3A NST MIG WIRE [12.5kg]
SKU: MS/NST/SM3A/1.2MM
Price: 105 GBP
Availability: InStock

SKU: MS/NST/SM3A/1.2MM | MPN: 550227

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1.2mm SM-3A NST MIG WIRE [12.5kg]

£87.50

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Overview
Specifications
Product Attachments
Frequently Asked Questions
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The SM-3A is a seamless metal-cored welding wire optimized for use with Argon/CO₂ mixed shielding gas (M21). It is suitable for both automated and manual welding of horizontal butt and fillet welds within the spray arc range. Additionally, it performs effectively in all positional welding when operating in the short arc (dip transfer) mode.

Comprising primarily metal flux, the SM-3A ensures high productivity. Its seamless design contributes to a stable welding arc with minimal spatter and produces an excellent bead appearance. The presence of only minor surface silica islands reduces re-ignition issues, facilitating multi-layer welding without the necessity for inter-run de-slagging.

The wire features a clean, copper-coated surface with precise diameter and roundness, promoting consistent wire feeding. This attribute is particularly beneficial when employing long conduit cables or engaging in automated welding processes. The SM-3A is engineered to achieve Charpy impact values of ≥47 joules at -40°C, making it suitable for applications requiring robust mechanical properties at low temperatures.

Typical All-Weld-Metal Chemical Composition:

Carbon (C): 0.05%
Silicon (Si): 0.56%
Manganese (Mn): 1.56%
Phosphorus (P): 0.010%
Sulfur (S): 0.013%
Copper (Cu): 0.25%

Typical All-Weld-Metal Mechanical Properties:

Yield Strength: 467 MPa
Tensile Strength: 564 MPa
Elongation: 28%
Charpy V-Notch Impact Value: 113J at -40°C

The diffusible hydrogen content is ≤5 ml/100g, with a typical value of 2 ml/100g, which helps in minimizing the risk of hydrogen-induced cracking.

The SM-3A holds approvals from several classification societies, including DNV-GL, LR, ABS, BV, DB, CWB, RINA, and CE, underscoring its compliance with stringent industry standards.

SKU

MS/NST/SM3A/1.2MM

Weight (kg)

12.5

MPN

550227

Frequently Asked Questions

Can you MIG weld stainless steel?

Yes, you can MIG weld stainless steel. It requires a suitable filler wire, typically ER308L, and a shielding gas like argon mixed with CO2. Ensure proper settings on your MIG welder for optimal results, and maintain cleanliness to prevent contamination.

How to choose a welder?

When choosing a welder, consider the type of welding you'll be doing (MIG, TIG, or Stick), the materials you'll work with, and your skill level. Look for a machine with the right amperage range, portability, and safety features. Don’t forget to check reviews!

How to MIG weld aluminum?

To MIG weld aluminium, ensure you use a spool gun or a push-pull system for better wire feed. Clean the aluminium surface thoroughly to remove oxides. Set the welder to the correct voltage and wire speed, and maintain a steady travel speed for a consistent bead.

How to MIG weld for beginners?

To MIG weld as a beginner, start by setting up your welder with the correct wire and gas. Clean the metal surfaces, then adjust the voltage and wire feed speed. Hold the torch at a 15-degree angle, maintain a steady speed, and practice on scrap metal to improve your technique.

Metals and how to weld them?

Welding metals involves understanding their properties. Common types include mild steel, stainless steel, and aluminium. Use MIG for mild steel, TIG for stainless, and MIG or TIG for aluminium. Always ensure proper preparation, safety gear, and suitable filler materials.

MIG welding what is it?

MIG welding, or Metal Inert Gas welding, is a popular welding process that uses a continuous wire electrode and an inert gas to shield the weld from contamination. It's known for its speed and versatility, making it ideal for various materials and applications.

What equipment do welders use?

Welders use various equipment, including welding machines (MIG, TIG, and stick welders), protective gear (helmets, gloves, and aprons), gas cylinders, welding rods, and accessories like clamps and wire brushes. Proper tools ensure safety and quality in welding projects.

What is a duty cycle on a welder?

The duty cycle on a welder refers to the percentage of time it can operate within a specific period, typically 10 minutes, without overheating. For example, a 60% duty cycle means the welder can run for 6 minutes and must cool for 4 minutes.

What is a multiprocess welder?

A multiprocess welder is a versatile welding machine that can perform various welding techniques, such as MIG, TIG, and stick welding, all in one unit. This flexibility makes it ideal for different projects, allowing users to switch processes easily as needed.

What is amperage in welding?

Amperage in welding refers to the electric current flowing through the welding circuit, measured in amperes (amps). It determines the heat generated during the welding process, influencing penetration and bead shape. Proper amperage is crucial for achieving strong welds.

What is flux core welding wire?

Flux core welding wire is a type of welding electrode that contains a flux core, which helps to protect the weld pool from contamination. It is commonly used in MIG welding and is ideal for outdoor work, as it can be used without a shielding gas.

What is slag inclusion in welding?

Slag inclusion in welding refers to the presence of non-metallic solid materials, such as slag, trapped within the weld bead. This defect can weaken the weld's integrity, leading to reduced strength and potential failure. Proper technique and cleaning can help prevent it.

What is the average cost of MIG welding equipment?

In the UK, the average cost of MIG welding equipment generally falls between £200 and £5,000. Entry-level models typically start from around £200 and can reach up to £1,000, making them ideal for hobbyists or occasional use. For professionals or industrial applications, high-performance machines can surpass £5,000, depending on the brand, specifications, and advanced features. It’s also worth noting that additional accessories—such as gas regulators, wire spools, and consumables can contribute to the overall investment.

What is the difference between AC and DC welding?

AC (Alternating Current) welding is ideal for aluminium and magnesium, providing a smoother arc and better cleaning action. DC (Direct Current) welding offers a more stable arc and deeper penetration, making it suitable for steel and other ferrous metals.

What is welding equipment?

Welding equipment refers to the tools and machines used to join materials, typically metals, through the application of heat and pressure. This includes welding machines, electrodes, torches, protective gear, and accessories essential for safe and effective welding processes.

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