ThePipingMart Blog Welding Electrodes ERCOCR-B Filler Wire – Composition, Properties, and Uses

ERCOCR-B Filler Wire – Composition, Properties, and Uses

ERCOCR-B Filler Wire

Welding is an essential process in many industries, and it requires the use of filler wires that are strong, durable, and corrosion-resistant. ERCOCR-B is popular among the many filler wires available due to its excellent mechanical and physical properties. But what exactly is ERCOCR-B filler wire, and what are the unique features that make it stand out in a crowded market? In this blog post, we will delve into ERCOCR-B filler wire’s composition, mechanical properties, physical properties, corrosion resistance, and heat treatment, among other aspects.

What is ERCOCR-B Filler Wire?

ERCOCR-B Filler Wire is a type of solid welding wire used in the shielded metal arc welding process. It consists of chromium, nickel, and molybdenum alloys which offer excellent mechanical properties for improved corrosion and wear resistance. It produces a weld deposit with good creep strength that can withstand high-temperature environments. The ferrite content in the joint makes this filler wire suitable for applications such as heavy structural fabrications, oil rigs, boilers, pressure vessels and cryogenic storage tanks. It also offers superior impact values at low temperatures compared to similar filler wires.

ERCOCR-B Filler Wire Composition

ERCOCR-B is a nickel-based electrode with a high level of chromium that makes it ideal for welding stainless or heat-resistant alloys. The wire contains 0.8% carbon, 30.5% chromium, 3.5% cobalt, and 1.3% tungsten, among other elements. The high chromium concentration makes it resistant to corrosion and oxidation, while the cobalt content improves strength and toughness. The wire also has high thermal conductivity, which means it can withstand high temperatures without degrading or breaking down.

Grade Chemical composition(%)
Co Cr W Ni C Mn Si Mo Fe
Co 12 Bal 30 8.5 ≤3.00 1.4 ≤1.00 1.3 ≤1.00 ≤3.00

ERCOCR-B Filler Wire Mechanical Properties.

One of the most significant advantages of ERCOCR-B welding wire is its impressive mechanical properties. The wire has a high ultimate tensile strength of 105,000 psi and yield strength of 55,000 psi. This makes it ideal for welding high-stress components that require high strength and durability. Additionally, the wire has excellent elongation properties, meaning that it can stretch and deform without breaking or cracking.

Rp0.2 (MPa)
Rm (MPa)
KV/Ku (J)
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
483 (≥) 237 (≥) 24 33 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

ERCOCR-B Filler Wire Physical Properties

ERCOCR-B filler metal’s physical properties also make it highly desirable for welding applications. It has a clean and uniform surface and is available in various diameters, making it suitable for a wide range of welding and brazing operations. The wire also has a low thermal expansion coefficient, meaning it does not shrink or expand significantly when subjected to high temperatures.

ERCoCr-B Filler Wires Trade Names

Class UNS Stellite
ERCoCr-B W73012 Stellite®12

ERCOCR-B Filler Wire Uses

ERCOCR-B welding wire is primarily used in welding and brazing applications requiring high heat resistance, abrasion, and corrosion. For instance, it is widely used in power generation, petrochemical, aerospace, and marine industries. The wire can weld various materials, including nickel-based alloys, cobalt alloys, and stainless steel. It can also be used in gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) processes.

ERCOCR-B Filler Wire Corrosion Resistance

ERCOCR-B filler wire’s most notable feature is its remarkable corrosion resistance. The wire is highly resistant to oxidation, nitration, and sulfidation, making it ideal for harsh environmental conditions. It exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, making it a reliable choice for welding critical components.

ERCOCR-B Filler Wire Heat Treatment

Finally, ERCOCR-B wire can be heat-treated to increase its strength and durability. The wire can be annealed at 2100°F for one hour, followed by cooling in the furnace. The annealed wire has excellent flexibility and toughness, making it ideal for welding applications that require strength and flexibility.


ERCOCR-B filler wire is an essential welding material due to its excellent mechanical and physical properties, high corrosion resistance, and versatility. The wire’s unique composition, high thermal conductivity, and impressive strength and elongation properties make it ideal for welding and brazing operations in various industries. Whether welding high-stress components or working in harsh environments, ERCOCR-B filler wire is a reliable and robust choice that ensures high-quality welds that meet the most demanding specifications.

Related Post