What are the key properties of Co 21 grade?

Co 21 offers excellent resistance to high heat, corrosion, and abrasion.

Is this a low hydrogen electrode?

Yes, it is designed as a low hydrogen type electrode.

What colors correspond to each grade?

Co 1 is Black, Co 6 is Red, Co 12 is Green, and Co 21 is Blue.

Polystel Cobalt Based 21 Grade Welding Rod

Name: Aws 5.21 Ercocr-E/Stellite 21/Polystel Cobalt Based 21 Grade Welding Rod
Brand: Wenzhou Tianyu Electronic Co., Ltd.
SKU: 1918767342

Zhejiang, ChinaWenzhou Tianyu Electronic Co., Ltd.

US$4.50-6.50

300 kg

Sample price:US$1.00/kg.Request sample

Product profile

Customization

Available

Type

Cobalt Base Welding Rod

Material

Cobalt Alloy

Model NO.

ERCoCr-E

Diameter

2.5mm 3.2mm 4.0mm

Length

1000mm

Welding Core Type

Alloy Structural Steel

Electrode Coating Type

Base

Function

Low Hydrogen Type Electrode, Hardfacing Electrode, Cobalt Base Welding Rod

Welding Power

AC and DC

Transport Package

Pallet

Trademark

TYUE

Origin

China

HS Code

8105900000

Production Capacity

50000000ton/Year

Key features

High Temperature Resistance: Excellent wear and heat resistance at high temperatures for demanding applications.

Corrosion and Abrasion Resistance: Superior resistance to corrosion and abrasion for extended component life.

Multiple Grade Options: Available in Co 1, Co 6, Co 12, and Co 21 grades for diverse industrial needs.

Versatile Diameter Sizes: Offered in 2.5mm, 3.2mm, and 4.0mm diameters to suit various welding requirements.

Dual Power Compatibility: Compatible with both AC and DC welding power sources for flexibility.

Low Hydrogen Electrode: Designed as a low hydrogen type electrode to ensure high-quality welds.

Wide Application Range: Ideal for valve seals, turbine blades, cutter edges, and high-pressure valves.

Standard Length: Standard length of 1000mm provided for consistent welding operations.

Company profile

Wenzhou Tianyu Electronic Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2006-12-01Average Response Time: ≤5.19h

AI-Powered supplier vetting

SummaryWenzhou Tianyu Electronic Co., Ltd. is described as a China-based manufacturer/factory and industrial-trading enterprise, with associated factories producing welding materials and transformers. The supplied information indicates ISO 9001 certification, more than 10 production lines, 6–10 years of R&D engineer experience, and 11–20 quality-control staff. It also reports exports to more than 50 countries and regions and export sales representing 41%–50% of total sales. The evidence supports established manufacturing, quality-management, international-market experience, and associated production resources. However, the available information does not sufficiently establish after-sales service performance, financial credibility, customization capability, or specific customer cases. The records also contain differing descriptions of the entity as a manufacturer/factory, a trading company, and an industrial-trading enterprise, so its precise operating structure should be verified.

Supplier typeThe supplier is identified as a Manufacturer/Factory and is described as an industrial and trading integrating enterprise focused on manufacture and trade. Another record classifies it as a trade company, while associated factories are identified for welding materials and electrical power equipment, indicating a mixed manufacturing-and-trading structure rather than a purely standalone factory.

CertificationsThe supplier explicitly reports certification to ISO 9001. This provides direct evidence of a formal quality-management-system certification, although no certificate scope, issuing body, or validity period is provided.

R&D capabilityThe supplier reports total R&D engineer experience of 6–10 years, which supports the presence of some experienced technical personnel. However, there is no evidence of patents, proprietary technologies, new-product development results, or dedicated R&D facilities, so broader innovation strength cannot be confirmed.

Production capacityProduction capability is supported by the manufacturer/factory description, more than 10 production lines, an identified factory location, 11–20 quality-control staff, and associated factories producing welding electrodes, welding wire, transformers, and high-voltage complete equipment. The supplier also reports exports to more than 50 countries and regions, indicating experience serving international markets.

Client casesThe supplier states that its products are exported to more than 50 countries and regions, including Europe, America, Africa, Southeast Asia, and the Middle East, and that export sales account for 41%–50% of total sales. These statements demonstrate international market reach, but no named customers, project references, or verifiable case studies are provided.