Multimet Coated Electrodes

At Metals And Welding Specialities, we proudly present our MULTIMET Coated Electrodes, a premium welding consumable engineered for high-temperature and high-stress applications. These coated electrodes deliver superior performance when joining nickel-base, cobalt-base, and specialty alloy systems. Built to rigorous standards, our MULTIMET electrodes ensure consistent weld integrity, excellent mechanical strength, and reliable corrosion resistance even under extreme conditions. The weld metal deposit from these electrodes is fully compatible for shielded metal arc welding of Haynes HR-120 alloy and is also suited for dissimilar metal joining involving alloys such as Haynes 556, HR-160, and other high-temperature materials.

Our MULTIMET Coated Electrodes correspond to ASTM / AWS classification E3155, and are available under the Universal Standard SFA/ASME 5.4 (E3155) specification. The UNS number for MULTIMET is W73155, with an equivalent wrought alloy designation of UNS R30155. The electrode system follows AMS 5795 standards as set by aerospace and high-performance alloy guidelines. The ASTM grade falls under the nickel-cobalt high temperature class, designed especially for demanding thermal and oxidative environments.

When using MULTIMET, welders will appreciate that the electrode coating and flux system are optimized to provide stable arc characteristics, easy slag removal, minimal spatter, and good deposition even in out-of-position welding. The chemical composition of the weld deposit includes roughly 20–22.5 % chromium, 19–21 % nickel, 18.5–21 % cobalt, 2.5–3.5 % molybdenum, 2.0–3.0 % tungsten, plus small amounts of niobium/tantalum and manganese, with carbon restricted to 0.10 % maximum. These alloying elements contribute to a weld metal with tensile strength of around 90,000 psi (≈ 620 MPa) and elongation near 20 % in the as-welded state.

In service, the welded joints with MULTIMET electrodes show excellent oxidation resistance, performing under operating temperatures up to 1500 °F and moderate stress up to 2000 °F. The welds also display favorable resistance under both oxidizing and reducing atmospheres, making them suitable for power generation equipment, furnace components, hot gas ducts, and petrochemical reactors. The corrosion resistance of the weld metal rivals that of stainless steels in nitric acid solutions, and outperforms them in mild hydrochloric acid environments at ambient temperatures.

Metals And Welding Specialities ensures that our MULTIMET Coated Electrodes are manufactured under strict quality control with full traceability. Each batch is supplied with a mill test certificate and is inspected for coating uniformity, moisture content, and dimensional accuracy. We offer a variety of electrode diameters (e.g. 2.4 mm, 3.2 mm, 4.0 mm, 4.7 mm) and lengths (254 mm or 355.6 mm) to suit diverse welding requirements. Operators can apply direct current electrode positive (DCEP) across the standard amperage range tailored for each diameter, and the rods perform reliably in all welding positions.

By integrating MULTIMET Coated Electrodes from Metals And Welding Specialities, fabrication workshops, power plants, chemical process units, and aerospace repair facilities can trust in durable, high-performance welds. Whether joining critical alloy parts or executing overlays, these electrodes deliver consistency, strength, and resistance under challenging operating regimes. Choose Metals And Welding Specialities’ MULTIMET for your high-temperature welding needs and benefit from our technical support, global delivery, and quality assurance.

• Specification MULTIMET Coated Electrodes

  Classification	AWS A5.11, E3155
  Form	Welding Electrode, Welding Rods
  Type Of Current	Direct Current Electrode Positive (DCEP)
  Diameters	3/32”, 1/8”, 5/32”, 3/16” or 2.5mm, Ø 3.2mm, Ø 4.0mm, Ø 5.0mm
  Size	2.0mm ∞ 5.0mm
  AC/DC+	50-80, 80-110, 100-135, 140-180
  Welding Positions	All positions 5/32” & 3/16” recommended for use in flat & horizontal positions only (F, V, OH, H)
  MULTIMET Coated Electrodes Application & uses	Petroleum Chemical plant Power sector Gas Industry Hardware tools Metallurgy Machinery Construction Shipbuilding

• Equivalent Grade Of AWS ENiCrMo-4 Coated Electrodes

  Class	UNS	Haynes
  E3155	W73155	MULTIMET

• MULTIMET Coated Electrodes Chemical Composition

  Iron:	Remainder
  Chromium:	20.0-22.5
  Nickel:	19.0-21.0
  Cobalt:	18.5-21.0
  Molybdenum:	2.5-3.5
  Tungsten:	2.0-3.0
  Manganese:	1.0-2.5
  Niobium + Tantalum	0.75-1.25
  Silicon:	1.0 max.
  Carbon:	0.10 max.
  Phosphorus:	0.04 max.
  Sulfur:	0.03 max.

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