BD-4P Steel?

rkmoore

rkmoore

Joined
Oct 30, 2010
Messages
2,870
My brother is interested in buying a new folder from Quartermaster Knives. They use BD-4P steel whichI appapparently the same thing as D4.

Does anyone here have any first hand experience with this steel? Or an opinion on it's use as a small blade steel?

Also, his second choice is a Benchmade 300-1. It's made with 154cm.

Any opinions on which steel is better for a hard use folder?

Thanks in advance for any help y'all can provide.

Rich.
 
I think this would be better posted in the General Knife Discussion area. I'll move it.
 
My brother is interested in buying a new folder from Quartermaster Knives. They use BD-4P steel whichI appapparently the same thing as D4.
Click to expand...

No D4 steel I can find. That's besides the point as it's the composition of 154cm steel, powder processed, so it's the equivalent of CPM 154 essentially. CTS steels are very good from what I've experienced. They are clean, consistent and their powder process makes good steel. https://www.cartech.com/ssalloysprod.aspx?id=4396
 
It is not the same thing as D4.

From:

https://www.cartech.com/ssalloysprod.aspx?id=4396

Carpenter® CTS® BD4P Alloy

Nominal Analysis
1.05 C, 1.00 Max. Mn, 0.040 Max. Ph, 0.03 Max. S, 1.00 Max. Si, 14.00 Cr, 4.00 Max. Mo, Bal. Fe

A powder metal processed, air-hardened, high-carbon chromium steel offering enhanced corrosion resistance and toughness compared with Type 440C stainless. The alloy is a strong candidate for a variety of cutlery and other knife applications.

CTS BD4P alloy is a high-performance blade steel offering a fine, uniform carbide structure yielding excellent edge retention and grinding/polishing characteristics. This alloy is part of the Carpenter CTS family of alloys.

IMO from this graph:

http://zknives.com/knives/steels/st...S-BD4,154cm,RWL-34&ni=420,4852,,49&hrn=1&gm=0

It is very similar to the powdered form of RWL-34 (Also similar to CPM-154) that is IMO a well balanced steel between properties.

The powdered version of a steel will normally have better toughness (all things being equal) to its ingot counterpart.
 
Thanks to everyone.
I'd never heard of this one and needed a little knowledge. :thumbup:
 
Jared from Mantis is now at Quartermaster, bashed the forum, and lied about what steel they were using in the past.
 
Yo Mama said:
Jared from Mantis is now at Quartermaster, bashed the forum, and lied about what steel they were using in the past.
Click to expand...

In your opinion is better stay away to buy any knife from Quartermaster. He might be lying again about the steel that is using now.
 
I own a QTR-6 with the BD4P steel. Has held its edge well, gets kind of a toothy sharpness as it wears.
 
tranid33 said:
In your opinion is better stay away to buy any knife from Quartermaster. He might be lying again about the steel that is using now.
Click to expand...

I want people to make their own decisions, I just would never buy one based on their history.
 
Thanks for the info on the real D4 Gator. I figured there should be a D4 as there was a D3 and a D5 but I haven't seen one. Looking at how many manufacturers there are it seems like I should have run across something about it before.

Joe
 
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