ERCoCr-C Cobalt-Based Hardfacing Bare Rod / Welding Wire

Short Description:

1. Description & Applications

ERCoCr-C (commonly known as Cobalt Alloy 12 / Stellite 12 equivalent) is a medium-carbon cobalt-based hardfacing alloy that bridges the gap between ERCoCr-A (Stellite 6) and ERCoCr-B (Stellite 1). It offers a balance of higher wear and abrasion resistance than ERCoCr-A, combined with greater impact resistance and toughness than ERCoCr-B. It performs exceptionally well under severe metal-to-metal wear, high-temperature oxidation, and particle erosion up to 800°C (1472°F).

Key Applications:

Saw blades for wood, particle board, and paper cutting
Shear blades, hot trimming dies, and forging tools
Extrusion screws and mixing paddles in the plastics and chemical industries
High-pressure valve seats, disks, and steam turbine components

2. Nominal Chemical Composition (wt%)

Element	C	Cr	W	Fe	Ni	Si	Mn	Co
Min (%)	1.20	27.00	7.00	—	—	—	—	Bal.
Max (%)	1.70	31.00	9.00	3.00	3.00	2.00	2.00	Balance

3. Mechanical & Deposit Properties (As-Welded)

Hardness (As-Welded): 43 – 49 HRC (single or multi-layer deposit)
High-Temperature Hardness: Excellent retention of hardness and strength at elevated temperatures up to 650°C (1200°F)
Deposit Structure: Austenitic matrix reinforced with evenly distributed chromium and tungsten primary carbides
Machinability: Difficult to machine due to high hardness; finishing is best accomplished by grinding with carbide or CBN tooling