[MW:25753] Re: Query Regarding Heat Treatment of Test Specimen ucs-85

Hi all,
        we are using 7c27mo2 material for hardening. material thickness is 0.300 mm. Hardening at 1040c Heating ramp 95 minutes and soaking exactly 10 minutes.
Hardness what we achieved is 640 - 650 HV and Yield strength is around 1400-1450 Mpa and Tensile strength is 1900 Mpa. Here the problem is some of the lots attain more than1900 Mpa of Tensile strength but some lots are fail to attain 1900 Mpa.

Process Details:
 Hardening - 1040C Heating ramp around 11C per min.
Quenching - liquid N2 gas at 5 bar pressure
Tempering - 200C for 2 hours.

On Monday, August 18, 2014 at 7:14:10 PM UTC+7, shaikh ahmed wrote:

Dear Sir,

 

Kindly Suggest.

 

if plate is normalized SA-516-70,dish head 2.1 is cold formed and then head is normalized due to extreme fiber elongation. do we need test secimens be tested to satisfy UCS-85?

 

waiting.

 

kind regds,

Shaikh Ahmed

--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/f1f34f16-c452-4e1d-a66a-de30187e1547%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.