Hardfacing Alloy
Thermal Spray Wire
Welding Consumables
Product Show
Hardfacing Alloy >> Co 21
 

Description
Co 21, cobalt based bare rod that forms a low carbon, austenitic alloy, with excellent work hardening properties, high temperature strength and impact resistant. Co 21deposits are stable during thermal cycling, making them a good choice for hot die materials. its used on steam and fluid control valve bodies and seats. It can be applied to all weldable steels, including stainless steels. It equivalent to: Stellite 21, Polystel 21.

Applications
Steam Valves. Hot Shears. Forging Dies. Piercing Plugs. Chemical and Petrochemical Valves.

Product Details
Chemical composition:

Grade Chemical composition(%)
Co Cr W Ni

C

Mn

Si Mo Fe
Co 21 Bal 27.3 0.5 2 0.25 0.5 1.5 5.5 1.5
Physical Properties
Grade Density Melting Point
Co 21 8.33g/cm3 1295~1435C

Typical Characteristics:

Hardness Abrasion Resistance Deposit Layers Corrosion Resistance Machilityineab
HRC 27~40 Good Multiple Good Carbide Tools

Standard Sizes:

Diameter Diameter Diameter
1/8 (3.2mm) 5/32 (4.0mm) 3/16 (4.8mm)
Note that special sizes, or packing requirements are available on all requests.
Specifications:

AWS A5.21 /ASME BPVC IIC SFA 5.21 ERCoCr-E
Copyright © 2010-2015 Yuan Qiao Surface Alloy Co.,Ltd All Rights Reserved