ERCoCr-B Cobalt-Based Hardfacing Welding Wire

Short Description:

ERCoCr-B (commonly known as Cobalt Alloy 1 / Stellite 1 equivalent) is a high-carbon, high-alloy cobalt-based hardfacing material designed to provide exceptional resistance to extreme abrasion, severe impact-free erosion, high-temperature wear, and metal-to-metal friction. Compared to ERCoCr-A, ERCoCr-B contains a higher volume of hard complex carbides, resulting in superior hardness and abrasion resistance at elevated temperatures up to 800°C (1472°F).

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Product Detail

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1. Description & Applications

Key Applications:

Expeller screws, agricultural shredders, and mixing blades
Steel mill guide rolls and hot piercing plugs
Coal pulverizer components and cement screw conveyors
High-wear valve seats and components exposed to severe abrasive slurry or particle erosion

2. Nominal Chemical Composition (wt%)

Element	C	Cr	W	Fe	Ni	Si	Mn	Co
Min (%)	1.70	28.00	3.50	—	—	—	—	Bal.
Max (%)	2.50	33.00	5.50	3.00	3.00	2.00	2.00	Balance

3. Mechanical & Deposit Properties (As-Welded)

Hardness (As-Welded): 45 – 53 HRC (single or multi-layer deposit)
High-Temperature Hardness: Maintains outstanding hardness and wear resistance up to 650°C (1200°F)
Deposit Structure: Austenite matrix densely packed with primary chromium-tungsten carbides
Machinability: Difficult to machine due to high hardness; requires grinding for final dimensional tolerance and finishing