EutecTrode 6666 Welding Electrodes

At Metals And Welding Specialities, we proudly present the EutecTrode 6666 Welding Electrodes, a dual-coated, hydrogen-controlled welding rod engineered for demanding structural steel fabrication and repair. The EutecTrode 6666 electrode combines the advantages of both rutile and basic flux coatings to deliver a smooth, stable arc and minimal spatter, making it ideal for joining low- and medium-alloy steels in all positions. Its deposit exhibits excellent mechanical strength, impact resistance down to sub-zero temperatures, and consistent elongation, making it well suited for heavy stresses in critical components.

When specifying this product, please note that the UNS designation is UNS K55550 (commonly used for the 6666 specification) and it conforms to ASTM A5.1 / A5.5 (depending on region) classification under the universal standard E8018-G or E42 4 B 32 (DIN EN ISO 2560-A) for structural and low-alloy applications. The product’s combination of alloying elements and controlled hydrogen content ensures crack resistance, sound fusion, and reliable joint integrity even under cyclic load or vibration.

The EutecTrode 6666 offers exceptional all-position weldability, allowing welders to employ DCEP (reverse polarity) or AC current with confidence. Its low heat input characteristic helps minimize distortion while preserving base metal properties. Additionally, because its coating is non-conductive, it resists side arcing and ensures clean strikes and re-strikes in confined spaces. The slag is easily removable, leaving a tidy weld bead ready for finishing or inspection without tedious cleanup.

Mechanical properties of weld metal deposited with EutecTrode 6666 are equally compelling: typical tensile strength lies around 565 MPa, yield strength around 430 MPa, and elongation of 25 % or more. In impact performance testing, welds maintain high toughness values—well above 47 J at –60 °C—making it suitable for cryogenic or low-temperature service. Operating temperature range spans approximately –60 °C to +350 °C. Because of its robust performance envelope, this electrode is often selected for pressure vessels, machine frames, support structures, flanges, girders, structural joints, and repair welding in industrial fabrication.

At Metals And Welding Specialities, we emphasize quality control and supply chain reliability. Our EutecTrode 6666 rods are packaged in moisture-resistant containers and dried before despatch to minimize the risk of hydrogen uptake. We advise re-drying at ~250 °C for 2 hours if the rods have been exposed to humidity. Welding procedures should follow standard pre-heat, interpass temperature, and post-weld practices to preserve full metallurgical integrity. Welders will appreciate its smooth transfer, fine droplet mode, and stable arc even in positional welding.

In summary, EutecTrode 6666 Welding Electrodes from Metals And Welding Specialities offer a highly balanced solution where strength, toughness, low distortion, and clean weldability are all critical. Whether for fabricating structural frames, repairing pressure parts, or working in low-temperature environments, its performance and versatility make it a go-to electrode for demanding applications. Contact us for datasheets, recommended parameters, or qualification runs tailored to your steels and codes.

• Specification EutecTrode 6666 Welding Electrodes

  Specification	Detail
  Product name	EutecTrode 6666
  Manufacturer / Brand	Castolin Eutectic (EutecTrode)
  Electrode type	Double-coated manual (coated stick) electrode
  Coating characteristics	Combination of basic and rutile characteristics (double coating)
  Classification	DIN EN ISO 2560-A: E 38 2 B 12 H 10; AWS A5.1: E7016
  Typical diameters	2.4 mm, 3.2 mm, 4.0 mm (common sizes)
  Current	Suitable for AC and DC welding
  Welding positions	All-position capable (good suitability for constrained / out-of-position work)
  Permissible operating temperature	From −20 °C up to +350 °C
  Key features	Low heat input; stable arc and fine droplet transfer; low spatter; easily removable slag; reinforced bead profile; good impact/toughness at sub-zero temps
  Typical applications	Joining structural and low-alloy steels (machine frames, supports, high-pressure pipes, flanges, heavy stressed joints)

• Equivalent Grade Of EutecTrode 6666 Welding Electrodes

  Standard / Specification	Equivalent / Classification
  Castolin / internal	Wire equivalent: EnDOtec DO65
  DIN EN ISO 2560-A	E 38 2 B 12 H 10
  AWS A5.1	E7016

• EutecTrode 6666 Welding Electrodes Parameters

  Parameter	Value / Range
  Tensile Strength (Rm)	~ 82,000 psi (~ 565 MPa)
  Yield Strength	~ 61,000 psi (~ 420-462 MPa)
  Elongation (L = 5 d)	~ 25 %
  Impact Strength (Charpy / ISO-V)	104 ft·lb @ 68 °F (~ 140 J @ 20 °C) 59 ft·lb @ 0 °F (~ 80 J @ −20 °C) > 47 J @ −60 °C
  Service Temperature Range	−60 °C to 350 °C
  Electrode Diameters	2.5 mm, 3.2 mm, 4.0 mm, 5.0 mm
  Welding Current / Amperage Ranges	2.5 mm → 70-90 A 3.2 mm → 100-130 A 4.0 mm → 130-170 A 5.0 mm → 140-190 A
  Recommended Polarity / Current Type	DCEP / AC
  Coating Type	Double (bipheric) coating, hydrogen-controlled, dual flux layers
  Low Heat Input Feature	Yes

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