38NiCrMov7-3/38NiCrMov7-7 material

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In summary, the conversation discusses the material 38NiCrMoV7-3 and the significance of the "3" in the name. It is revealed that the number indicates the percentage of chromium in the alloy and that switching to 38NiCrMoV7-7 increases the chromium percentage from 3% to 7%. The reason for this change is unknown and may be related to properties such as machineability, casting characteristics, thermal or corrosion resistance. The conversation also mentions searching for equivalent materials and contacting manufacturers for further information.
  • #1
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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  • #2
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.
 
  • #3
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.
 
  • #4
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.
 
  • #5
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.
 

1. What is 38NiCrMov7-3/38NiCrMov7-7 material?

38NiCrMov7-3/38NiCrMov7-7 is a type of low-alloy steel commonly used in the manufacturing of heavy duty machinery and equipment. It is known for its high strength, toughness, and good hardenability.

2. What are the main properties of 38NiCrMov7-3/38NiCrMov7-7 material?

The main properties of 38NiCrMov7-3/38NiCrMov7-7 material include high tensile strength, good toughness, excellent hardenability, and resistance to wear and corrosion. It also has good impact strength and can withstand high temperatures.

3. What applications is 38NiCrMov7-3/38NiCrMov7-7 material commonly used for?

38NiCrMov7-3/38NiCrMov7-7 material is commonly used in the manufacturing of heavy duty machinery and equipment, such as gears, shafts, crankshafts, and connecting rods in the automotive, aerospace, and construction industries. It is also used in the production of tools and dies.

4. What are the differences between 38NiCrMov7-3 and 38NiCrMov7-7?

38NiCrMov7-3 and 38NiCrMov7-7 are two different grades of the same material. The main difference between them lies in their carbon content. 38NiCrMov7-3 has a lower carbon content, making it more suitable for applications that require higher toughness and impact resistance. 38NiCrMov7-7, on the other hand, has a higher carbon content, making it more suitable for applications that require higher strength and hardness.

5. How is 38NiCrMov7-3/38NiCrMov7-7 material processed and heat treated?

38NiCrMov7-3/38NiCrMov7-7 material is typically hot rolled, followed by quenching and tempering to achieve the desired mechanical properties. It can also be case hardened to increase its surface hardness and wear resistance. For optimal performance, it is important to carefully control the heating and cooling processes during heat treatment.

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