Welding has become one of the most important processes in today’s world. It has made it possible to create several products that have significantly enhanced our lives. One significant aspect of welding is the choice of filler material. AWS Class ER420 MIG & TIG is a filler material that is used to produce high-quality welds on materials. This blog post will provide all your information about this welding filler material.
What is AWS Class ER420 MIG & TIG?
AWS Class ER420 MIG & TIG is a welding process used primarily for aluminium alloys. It utilizes an electric arc fed with a consumable wire and provides higher deposition rates, faster metal removal rate, reduced heat input, better weld penetration and superior joint quality. This type of welding is suitable for use in thin-gauge materials ranging from 0.4 to 6 mm thick and can be used in both manual and robotic applications. The key benefits are that it creates strong welds with narrow bead widths; has little need to clean or grind the weld; uses low current levels, ensuring fast, strong joint formations; allows spatter-free welding with minimal distortion or deformation of the base material providing superior aesthetics; and is suitable for a wide range of metals including aluminium alloys as well as steel, magnesium & titanium alloys too.
ER420 MIG & TIG Welding Wire Composition
AWS Class ER420 MIG & TIG welding alloy is a type of stainless steel composed of carbon, chromium, and nickel. It is also called a “martensitic” or “18-12” steel. The percentage of carbon in this filler material helps increase its hardness, while the chromium content increases its corrosion resistance.
| C | Cr | Ni | Mo | Mn | Si | P | S | Cu |
| 0.03 | 19.5-22.0 | 9.0-11.0 | 0.75 | 1.0-2.5 | 0.65-1.00 | 0.03 | 0.03 | 0.75 |
ER420 MIG & TIG Coated Wire Physical Properties
AWS Class ER420 MIG & TIG welding wire has a high melting point, ranging from 1480°C to 1530°C. It also has a density of 7.75g/cm³ at room temperature, making it relatively heavy. The phase structure of AWS Class ER420 MIG & TIG is martensitic, which means that it can undergo hardening through heat treatment processes.
ER420 MIG & TIG Welding Wire Mechanical Properties
AWS Class ER420 MIG & TIG welding electrode has high tensile strength, ranging from 700 to 900 MPa. It also has a high yield strength ranging from 400-700 MPa, making it ideal for applications that require high strength. The elongation percentage of AWS Class ER420 MIG & TIG electrode ranges from 15% to 20%, which further ensures that the material is pliable.
| Tensile Strength (psi) | 86,000 psi (593 MPa) |
|---|---|
| Yield Strength (psi) | 57,000 psi (393 MPa) |
| Elongation (%) | 42% |
ER420 MIG & TIG Coated Wire Trade Names
| Class | UNS | Oxford Alloys |
| ER420 | S30888 | Alloy 420 |
ER420 MIG & TIG Welding Wire Parameters
| Diameter | Process | Volt | Amps | |
| in | (mm) | |||
| .023 | (0.6) | GMAW | 14-19 | 30-85 |
| .030 | (0.8) | GMAW | 15-20 | 45-125 |
| .035 | (0.9) | GMAW | 16-22 | 60-150 |
| .045 | (1.14) | GMAW | 17-22 | 90-210 |
| 1/16” | (1.6) | GTAW | 12 | 80-150 |
| 3/32” | (2.4) | GTAW | 12 | 150-250 |
| 1/8” | (3.2) | GTAW | 12 | 200-375 |
ER420 MIG & TIG Coated Wire Uses
AWS Class ER420 MIG & TIG filler wire is mostly used to manufacture cutting tools, blades, valve parts, and pump shafts. Its high strength and corrosion resistance make it an ideal material for these applications. It is also used in the automotive industry, such as in the manufacturing of exhaust systems and braking systems.
ER420 MIG & TIG Welding Wire Heat Treatment
AWS Class ER420 MIG & TIG filler metal can be hardened through heat treatment methods such as tempering or quenching. The heat treatment process will increase the hardness and strength of the material, making it more suitable for applications that require high strength.
ER420 MIG & TIG Coated Wire Corrosion Resistance
AWS Class ER420 MIG & TIG has excellent resistance to corrosion in both acidic and alkaline environments. It is highly resistant to pitting, crevice corrosion, and stress corrosion cracking, making it ideal for use in harsh environments.
Conclusion
In conclusion, AWS Class ER420 MIG & TIG is a high-quality welding filler material with numerous applications in different industries. Its physical and mechanical properties and high corrosion resistance make it an ideal material for manufacturing products that require high strength and durability. At the same time, the material can be hardened through heat treatment processes to increase its strength further. AWS Class ER420 MIG & TIG is a reliable and effective welding material that has become an important part of the welding industry.
Meet Heer, a dynamic and driven writer learning tricks of her trade in the metal industry. With a background in Digital Marketing, Heer brings a unique perspective to her writing, sharing valuable insights. Apart from blogging she like reading and hiking.
