Re: [MW:20046] Query for HT condition for 50Ton Ranshorn Hook MOC: 20C15

Heattreatment Quenching and tempering is acceptable provided required hardness n microstructure is achieved

On Feb 7, 2014 7:09 PM, "Raghuram Bathula" <raghurambathula@gmail.com> wrote:

You need the hook as per IS 4367 or 5749? Why use both codes?

On Feb 7, 2014 9:33 PM, "D'Souza Bosco (Mumbai - Piping)" <B.A.Dsouza@ticb.com> wrote:

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

 

 

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