PDA

View Full Version : Choice of steel



Mermaid
02-28-2017, 11:11 PM
All:

I have a 1.5"x6" hunk of 4140 HT which seems to machine like mild steel (disappointed) . I'm re-building a vise lead screw and I require a reasonably hard material. Would I be better off using a water hardening or oil hardening (annealed) tool steel instead? I don't have facilities for heat treatment and I'm really short of funds so sending parts out for heat treatment is not an option.

KiddZimaHater
02-28-2017, 11:31 PM
303 Stainless is good for shafts, easy to machine. "Relatively" hard without any heat-treating, and has anti-galling features.

J Tiers
02-28-2017, 11:32 PM
It DOES machine well. But you may notice that it wears out HSS pretty rapidly.

It will likely work OK for your screw. And wear less than annealed un-treated O-1 or W1.

1144 is another material that machines super and yet does not wear that fast.

Boostinjdm
03-01-2017, 03:35 AM
Yep 1144, I use stress proof for pretty much anything I don't need to weld. It can be hardened too.

Toolguy
03-01-2017, 09:20 AM
The 4140 HT is a good choice for that application. It machines well, but is pretty tough.

lakeside53
03-01-2017, 12:50 PM
Are you sure it's HT or "annealed". Annealed will machine very much like gummy 1018/A36.

Doozer
03-01-2017, 02:42 PM
Another vote for 1144 Stressproof.
It is around Rc32 if I recall.
Turns, mills, and drills and taps well.

-Doozer

Sparky_NY
03-01-2017, 04:05 PM
Another vote for 1144 Stressproof.
It is around Rc32 if I recall.
Turns, mills, and drills and taps well.

-Doozer

speedymetals says 24-26Rc depending on the diameter. I never tried it but will have to some time, its often recommended.
http://www.speedymetals.com/information/material36.html