38NiCrMov7-3/38NiCrMov7-7 material

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Discussion Overview

The discussion revolves around the material specifications of 38NiCrMov7-3 and 38NiCrMov7-7, focusing on the meaning of the numerical designations and the properties of these alloys. Participants inquire about the implications of the chromium content and seek information on equivalent materials, particularly for applications in power transmission.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • Some participants inquire about the meaning of the "3" in 38NiCrMov7-3, suggesting it indicates chromium content.
  • One participant proposes that the change from 38NiCrMov7-3 to 38NiCrMov7-7 reflects an increase in chromium from 3% to 7%, potentially affecting machinability, casting characteristics, thermal or corrosion resistance.
  • Another participant expresses difficulty in finding information on 38NiCrMov7-7 and asks for equivalent materials.
  • A participant notes that 38NiCrMov7-3 and 38NiCrMov7-7 are European DIN standard specifications and suggests contacting manufacturers for more information.
  • One participant mentions using the material in power transmission applications, specifying operational conditions such as a working temperature of 100 degrees and continuous submersion in oil.

Areas of Agreement / Disagreement

Participants generally agree on the significance of the numerical designations in relation to chromium content, but there is no consensus on the specific properties or equivalents of 38NiCrMov7-7. The discussion remains unresolved regarding the availability of equivalent materials and detailed properties of 38NiCrMov7-7.

Contextual Notes

Limitations include a lack of detailed information on the properties of 38NiCrMov7-7 and the absence of established equivalents in other standards. The discussion also reflects uncertainty regarding the implications of changing chromium content.

Who May Find This Useful

Individuals involved in materials science, metallurgy, or engineering applications related to power transmission and those seeking information on European DIN standard materials may find this discussion relevant.

Tpatel56
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In material 38NiCrMov7-3 what is "3" Indicating.
And anyone have properties of 38NiCrMov7-7 material.
 
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Tpatel56 said:
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.
 
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.
 
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.
 
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.
 

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