[MW:27842] What is the tempering temperature followed to meet mechanical properties of CA15 castings-reg

Dear friends,

We have been procuring ASTM A 217-CA15 castings form foundries. While checking raw material certificate the hardness and mechanical values are not meeting the ASTM A 217 –CA15 standard, our requirement of hardness = 250-300 BHN, T.S = 620-795MPa, YS=450MPa minimum, while enquiring the foundry they told that 260-270 HBW will be achieved but TS & YS could not achieved. Can you help us what is the tempering temperature to be followed to achieve the required hardness & mechanical properties? Kindly do the needful.   

 

Regards,

Sankaran.SP

Welding & Metallurgy expert