ERCoCr-A Stellite 6 Filler Wire
What is ERCoCr-A Stellite 6?
ERCoCr-A is a cobalt-based hardfacing filler classification linked to the Stellite 6 type alloy. The alloy combines hardness with abrasion and surface-damage resistance, and it retains useful properties at elevated temperatures. Operators deposit it on compatible components to protect surfaces that wear in service. Results vary. The base material, operating conditions, and hardfacing procedure determine whether the alloy fits a given component.
The official COREWELD ST6 datasheet lists technical specifications, chemical composition, and product details. Read it before you finalise your hardfacing plan.
Cobalt forms the base of the alloy and maintains hardness at elevated temperatures. Chromium adds oxidation resistance and forms exceptionally durable carbides. Tungsten strengthens the matrix, while carbon controls carbide content and therefore wear resistance. Silicon, iron, and nickel appear as controlled elements. Mechanically, the alloy offers exceptional resistance to galling, cavitation, and high-impact wear, retaining high tensile strength and hardness even at service temperatures exceeding 500°C.
ERCoCr-A Filler Wire, ERCoCr-A Stellite 6 Filler Wire, ERCoCrA Cobalt Base Bare Cast Rod
ERCoCr-A filler wire deposits resist abrasion, erosion, and metal-to-metal wear, and they keep functional hardness at elevated temperatures. Corrosion resistance varies with the service environment, so rely on the documented technical data only. No single alloy suits every wear mechanism or corrosive condition. Match the filler to the failure mode you need to control.
Technical Specifications of COREWELD ST6
This ERCoCrA Cobalt Base Bare Cast Rod carries the AWS A5.21 ERCoCr-A classification, subject to product certification.
| Specification | Details |
| Brand | COREWELD ST12 |
| Product Name | ERCoCr-B Filler Wire |
| AWS Classification | ERCoCr-B |
| Applicable Standard | AWS A5.21 / ASME SFA A5.21 |
| Material Type | Cobalt Base Hardfacing Alloy (Bare Wire Cobalt) |
| Product Form | Bare Cast Rod (Referred to as “Type 12 bare rod”) |
Why Choose COREWELD ST6?
COREWELD ST6 Filler Wire gives buyers a defined starting point for cobalt-based hardfacing. The product carries the ERCoCr-A classification, and the official datasheet documents its specifications, rod dimensions, and packaging. Technical support is available to review your base material and service conditions.
Supply Options and Technical Support for COREWELD ST6
Rod dimensions, packaging, and order quantities appear in the datasheet, and the team confirms them for each enquiry. Include the component material, wear conditions, application, and required dimensions in your request. Technical staff use these details to recommend the right product configuration.
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FAQ's
What is ERCoCr-A Stellite 6 used for?
Fabricators use it for hardfacing compatible components that suffer abrasion, erosion, or metal-to-metal wear, including valve seats, shear blades, and extruder screws, often at elevated temperatures.
What is the AWS A5.21 classification for ERCoCr-A?
ERCoCr-A falls under AWS A5.21, the specification for bare electrodes and rods for surfacing. The letters CoCrA A identify the cobalt-chromium composition group.
What is the difference between ERCoCr-A filler wire and bare cast rod?
ERCoCr-A names the alloy classification, while ‘bare cast rod’ describes its physical form. Wire and cast rod share a composition but differ in manufacture and in the welding processes they suit.
Which applications use cobalt-based hardfacing alloys?
Valve manufacturing, pumps, hot forging, extrusion, and cutting tool maintenance use cobalt-based hardfacing alloys wherever surfaces face wear, heat,\ or both.
What are the main properties of Stellite 6-type alloys?
Stellite 6-type alloys combine hardness, abrasion resistance, and high-temperature hardness retention. Verified values for COREWELD ST6 appear in its datasheet.
How do I select the right cobalt-based hardfacing filler material?
Start with the base material, wear mechanism, operating temperature, and welding process. Compare these against each applicant’s datasheet, then qualify the procedure on a trial component before production.