38NiCrMov7-3/38NiCrMov7-7 material

[Tpatel56]

In material 38NiCrMov7-3 what is "3" Indicating.
And anyone have properties of 38NiCrMov7-7 material.

 

[Baluncore]

In material 38NiCrMov7-3 what is "3" Indicating.

38 Ni Cr Mo V 7 - 3 indicates Ni 7%, Cr 3%
Changing to 38 Ni Cr Mo V 7 - 7 increases the Cr from 3% to 7%.
You need to find out why Cr is changed in that alloy.
It may be changed for reason of machineability, casting characteristics, thermal or corrosion resistance, etc.

 

[Tpatel56]

Hi..Baluncore Thank you.

For 38NiCrMoV7 -7, i have try to find some stuff on internet but not getting anything. Is their any equivalent material for 38NiCrMoV7-7.

 

[Baluncore]

The very rare 38 NiCrMoV 7-7, and the more common 38 NiCrMoV 7-3, are a European DIN standard specification.
You should probably contact a company such as Böhler for further information.

Are you able to identify and contact a manufacturer of 38 NiCrMoV 7-7 ?
There will be equivalents in other standards to 38 NiCrMoV 7-3 but probably not for 38 NiCrMoV 7-7.

 

[Tpatel56]

Hello,

We are still looking for manufacturers of same. We are using this material in power transmission in pump. And working temperature should be 100 degree and continuously submerged in oil.