RE: [MW:0] RE: 5478] RE: 5437] Hardness of Untempered Martensite

You’re welcome, Mr. Babu.  The previous figure does apply to alloy steels as well as to plain-carbon. 

 

Alloy content in a ferritic steel strongly influences its hardenability, which is how easily martensite can be produced by quenching its austenite.  Carbon content, on the other hand, determines the hardness of any martensite that is produced, and thus determines the maximum attainable hardness of a steel.  The attached figure demonstrates both of these principles.

 

~RWW

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu
Sent: Wednesday, June 09, 2010 7:53 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:5504] RE: 5478] RE: 5437] Hardness of Untempered Martensite

 

Mr.Robert,

 

Thanks,

 

Will this figure applicable to alloy steels ?

 

I assume that, it will applicable to plain carbon steels only.

 

 

Regards,

 

K.Babu

Singapore

 

----- Original Message -----

From: Warke, Robert

To: materials-welding@googlegroups.com

Sent: Wednesday, June 09, 2010 8:29 PM

Subject: [MW:5492] RE: 5478] RE: 5437] Hardness of Untempered Martensite

 

Mr. Babu,

 

The hardness of untempered martensite is determined almost entirely by its carbon content, as shown in the attached diagram.

 

Regards,

R. W. Warke

 

Robert W. Warke, P.E.
Associate Professor of
Welding & Materials Joining
School of Engineering & Engineering Technology

LeTourneau University

 

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu
Sent: Tuesday, June 08, 2010 6:21 AM
To: materials-welding@googlegroups.com
Subject: [MW:5437] Hardness of Untempered Martensite

 

Hi

 

Any body have the idea on hardness for the untempered Martensite ?

 

What will be the morphology of micro?

 

Thanks & Regards,

 

K.Babu
Singapore

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