SUGGESTIONS

[HEAVY METAL]

ANYONE KNOW WHAT ASTM A514 (T-1)GRADE H STEEL IS SIMILAR TO. TRYING TO COME UP WITH A GOOD STARTING POINT FOR SFM. CANT FIND ANY INFO ON THIS MATERIAL IN HANDBOOK OR CUTTER TECHINCAL CATALOGS

THANKS HEAVY

[EZ3PUTT]

Will be very similar to 4140 in the range of 30-36 HRc.

[d0gFartz]

Check www.matweb.com

[McRae]

For completness in the emastercam knowledge web,

 

ASTM A514/A514M - High Yield Strength, Quenched and Tempered Alloy Steel Plate, Suitable for welding. (The Metals Black Book,Ferrous Metals 2nd Edition Volume 1 - Casti Publishing 1997 pg260)

 

Looking up a similar material in the Machining Data Handbook, (using 4340 as a similar material)

Q&T steels run in the order of 43-48Rc (416-465BHN).

 

Sandvik's technical data (LitCat 00-T)indicates a cutting speed of 400-750sfm@350BHN for a P10 (GC4015) carbide in a turning application. In a milling application, the carbide is spec'd to run at 805sfm @ 180BHN for a P10 carbide. As this hardness is above that I would multiply by .6 and use 240-450sfm to start and increase the chip thickness first and then up the cutting speed while maintianing the constant chip thickness.

 

Please post what worked.

[Davez]

I have worked with T1 in the past and it is a lot friendlier to machine if you can have it sub-annealed first. It seems to mill ok after that, but you still will probably have to run any drills or reamers very slow, around 30 or so sfm, from what I remember. Hope that helps a little