Shanghai Golston Shipping Fitting


Ensure the base metal fuse well with overlay welding layer, eliminate defects such as pores, enclosed slag, loose, etc.

Hardening treatment changes the grain size of alloy-layer, from grad 6-7 to grade 10-12.

Hardness of alloy-layer is improved from below HRC50°to above HRC60°

Designed for the exhaust valves both for the heavy oil and light oil engines.