[MW:20036] Query for HT condition for 50Ton Ranshorn Hook MOC: 20C15

Material of Construction of 50 Ton hook: 20C15 complying to IS 4367 code, implies final condition Harden & Tempered.

Hook designed as per Ramshorn hook IS 5749-1970 calls for Normalizing heat treatment after forging and before testing.

A vendor has conducted Normalizing + Hardening (quenching) + tempering followered by testing.

 

Now the Inspection Agency is not accepting the Hook, on the basis that the hook is Q+T.

 

Has anyone experience in the above.

 

 

 

Thank You,

 

Regards,

Bosco A. D’Souza

Welding Engineer