350mm Stellite 21 Welding Electrode Cobalt Based Alloy Ercocr-E

• Type: Cobalt Based Alloy Welding Electrode
• Material: Cobalt Based
• Diameter: 3.2mm
• Length: 350mm
• Welding Core Type: Alloy
• Electrode Coating Type: Alkaline
• Model NO.: Stellite 21
• Slag Characteristic: Alkaline
• Function: Hardfacing Electrode
• Welding Power: DC
• Application: Hardfacing, Wear-Resistance, Corrosion-Resistance
• Transport Package: 5kg/Box
• Specification: 2.7mm, 3.2mm, 4.0mm
• Trademark: Xunzhuo
• Origin: China
• HS Code: 8311100000
• Production Capacity: 5000kg/Month

Product Description

The product pictues




Stellite 21 consists of a CoCrMo alloy matrix containing dispersed hard carbides which strengthen the alloy and increase its hardness, but also decrease the ductility. The type, shape, size, and distribution of the carbides is strongly influenced by the processing history of the alloy, and for this reason the mechanical properties of Stellite 21 are very dependent upon the manufacturing route and any subsequent heat treatments. 

Due to the low volume fraction of carbides, the Co-based alloy matrix dominates the wear and corrosion properties. Stellite 21 has excellent cavitation, galling and metal-to-metal sliding wear resistance, but is not recommended for severe hard particle abrasion. The surface can work harden considerably during wear or even during machining, and the use of correct machining tools and techniques is important to achieve optimal results. 

Stellite 21 has excellent resistance to thermal and mechanical shock. Optimum high temperature strength is obtained by solution heat treatments at 1200-1240ºC (2190 - 2265ºF) followed by quenching, and aging in the temperature range 7001150°C (1290-2100°F).   

It can be cast, powder metallurgically processed, or applied as a weld hardfacing. It is recommended for applications involving cavitation, erosion, corrosion and/or high temperatures, such as valve trim for petrochemical and power generation. Due to its good impact resistance, it has been widely used in the building up of forging or hot stamping dies. The oxyacetylene weld deposition method is not recommended for this alloy.

Brand	Xunzhuo	Model Number	Stellite 21
Form / Shape	Electrode	Dimensions	DIA. 2.4, 2.6, 3.2, 4.0, 4.8, 5.0 mm
Process	SMAW/MMA/MMAW	Application	Hardfacing, Wear-resistance, Corrosion-resistance
Equivalent	Stellite 21, BISHILITE (MHA) No.21, Weartech WT-21
Certification	ISO 9001:2015	Test Report	Signed & Stamped
Free Docs	CO / GSP Form A E F P	Currency	USD/EUR/GBP/RMB
Lead Time	Shipment within 10 days	Label	Brand, Neutral or Customized

Specification

 

AWS / ASME: A5.13 / SFA5.13 ECoCr-E
Metal to metal Wear	Excellent
Cold / Hot Abrasion	Good / Good
Erosion / Corrosion	Excellent / Excellent
Impact	Excellent
Magnetic	No
Deposit Layers	Multiple
Thermal Conductivity	14.5 W/m.K, 100.5 Btu-in/hr/ft2/°F
Electrical Resistivity	87.38 µ-ohm.cm, 34.4 µ-ohm.inch

Chemical Composition (%)

Co	Cr	Mo	C	Ni	Others	Hardness	Density	Melting Range
Bal.	26-29	4.5-6.0	0.20-0.35	2.0-3.0	Fe, Si, Mn	27-40 HRC	8.33 g/cm3	1295-1435 ºC

Packages:

Size: 2.7mm*1000mm

package: 5 kg/inner box

Size: 3.2mm*1000mm

package: 5 kg/inner box

Size: 4.0mm*1000mm

package: 5 kg/inner box

outer box is cardboard carton

However, we can do it as client's request: 

Delivery:7-15 days after order confirmed



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