Thank you for your response. I wanted to clarify that we are currently planning on normalizing the plates, air quenching (high flow rate cooling fans) and subsequently tempering at 730°C.
My question is where in the ASME specifications does it define the quenching parameters (flow rate, ambient temperature, water temperature, humidity, etc) for quench from normalization for SA387 plate. Again, we will temper after the plates are quenched.
Again, I appreciate your assistance and look forward to your response.
Best regards,
Jason Carter
Metallurgical Engineer
On Thu, Oct 7, 2010 at 5:14 AM, JASPAL SINGH <jaspaldhesi@gmail.com> wrote:
Accelerated cooling via water spray or fans or controlled liquid
quenching to achieve a uniform, fine grained homogenous structure is
NOT the same as quenching in thermal heat treatment to achieve a 100%
martensite structure that is required for Q&T thermal treatment.
The alternative accelerated cooling methods as described in ASME
Specifications were provided to assure that thicker plate sections or
other wrought, geometric product forms can be reasonably assured to
achieve a fine grain, consistent structure (in this case either 100%
fine pearlite or a uniform mixture of fine pearlite and bainite
(depending on the alloy composition)prior to tempering (if
specified).
Jaspal Singh, CWI-AWS, CSWIP-3.1
Quality Assurance
Process Equipment Division
ISGEC, Yamuna Nagar, Haryana -135001
Phone: 911732307251
Ext: 251 Mb: +91 9996624244
On Oct 7, 1:24 am, Jason Carter <jason.andrew.car...@gmail.com> wrote:
> Hello,
>
> I have a question about SA387 (1.25 Cr 0.5 Mo) steel. The ASME code
> in Section II notes that SA387 may be air blasted or liquid quenched.
> Where in the ASME code does it define the procedures for air blasting
> or water quenching.
>
> Thanks for your help,
>
> Jason
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