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Product Name AWS Chemical Composition Characteristics & Application
F221   Cr26 W5 B0.7 Co Rem. PTA hardfacing of sealing surface of high temperature and high pressure valve and the edge of hot shearing tool.
F223   Cr21 W5 B1.5 Co Rem. PTA hardfacing of parts resistance to wear and corrosion at high temperature, such as valve under high temperature and high pressure, and blower.
F321   Cr13 B1.5 Si1 Fe Rem. PTA hardfacing of corrosion-resistant parts under mid-temperature and mid-pressure, such as stop-plate etc.
F322   Cr23 Ni13 Si5 B1 Fe Rem. PTA hardfacing of corrosion-resistant parts under mid-temperature and mid-pressure, such as valve base etc.
F422   Sn10 P0.3 Cu Rem. PTA hardfacing of axle and bearing etc.