Speed & feed for Stainless 13-8 MO ??

[clay]

Recommendations / experiences with turning 13-8 MO stainless? Including
threading. Cliff can you dig up some speeds & feed info?

ca

[Cliff]

Post by clay
Recommendations / experiences with turning 13-8 MO stainless? Including
threading. Cliff can you dig up some speeds & feed info?
ca

http://www.suppliersonline.com/propertypages/13-8.asp
13-8 Stainless Steel [PH 13-8 Mo (tm),Vasco13-8 (tm)]
[
This is a tough machining stainless steel. Although it can be machined in all
conditions, best results can be obtained in condition H1150M. Compared to type
304 stainless, speeds should be roughly 25 % lower for optimum tool life and
finish.
]

"AMS-5629 PH 13-8 MO SOLUTION TREATED"

You don't give it's condition/HT/hardness .. ?
Or your tooling material?

Kennametal:
www.kennametal.com/.../turning/kenna_perf_selecion_guide.pdf;jsessionid=RKAE5UZOFXT3JLAUBIOSFEVMCQFBYIV0
https://www.kennametal.com/images/pdf/cat_help/Lathe_Tech_KPAppData.pdf

I'll try to check the MDH tonight.
And remember about this thread <g>.

[Cliff]

Post by Cliff
I'll try to check the MDH tonight.

Turning, single point.
Covers the following alloys in this group of materials:
15-5 PH, 16-6 PH, 17-4 PH, 17-7 PH, 17-14 Cu Mo, AF-71, AFC-77,
Almar 362 (AM-362), AM-350, AM-365, AM-363, Custom 450,
Custom 455, HNM, PH 13-8 Mo, PH 14-8 Mo, PH 15-7 Mo and
Stainless W
Using inch units.
Using unbrazed Carbides

Hardness, Bhn Condition
150-200 solution treated
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 400 .007 C-7 525 .007 CC-7
.150 350 .015 C-6 450 .015 CC-6
.300 275 .030 C-6 350 .020 CC-6
.625 210 .040 C-6

Hardness, Bhn Condition
275-325 solution treated or hardened
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 350 .007 C-7 450 .007 CC-7
.150 300 .015 C-6 400 .015 CC-6
.300 240 .020 C-6 300 .020 CC-6

Hardness, Bhn Condition
325-375 solution treated or hardened
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 325 .005 C-7
.150 275 .010 C-6
.300 225 .015 C-6

Hardness, Bhn Condition
375-440 hardened
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 225 .005 C-7
.150 190 .010 C-6
.300 150 .015 C-6



Using Ceramic tools

Hardness, Bhn Condition
150-200 solution treated
DOC FPM IPR Type of Ceramic
.040 1500 .005 CPA
.150 1000 .010 CPA
.300 700 .015 HPC

Hardness, Bhn Condition
275-325 solution treated or hardened
DOC FPM IPR Type of Ceramic
.040 1100 .005 HPC
.150 600 .010 HPC
.300 400 .015 HPC

Hardness, Bhn Condition
325-375 solution treated or hardened
DOC FPM IPR Type of Ceramic
.040 1000 .004 HPC
.150 500 .008 HPC
.300 300 .012 HPC

Hardness, Bhn Condition
375-440 solution treated or hardened
DOC FPM IPR Type of Ceramic
.040 900 .004 HPC
.150 450 .008 HPC
.300 250 .012 HPC


Single point threading
Bhn 135-440
Diameter under 1"
Infeed per pass
First pass .015 Last pass .001
65-100 SFM for C-6 Carbide, 8-20 SFM for HSS (T15 or M42*)

Diameter 1 to 6"
Infeed per pass
First pass .015 Last pass .001
80-120 SFM for C-6 Carbide, 10-25 SFM for HSS (T15 or M42*)

* "Any premium HSS: T15, M33, M41-M43 or S9, S10, S11, S12"

I did not cover HSS or brazed tools nor tool geometry nor cutting fluid(s).
You can (within reason) interpolate other speeds & feeds depending on
DOC from this I think.

HTH

[D Murphy]

Post by clay
Recommendations / experiences with turning 13-8 MO stainless? Including
threading. Cliff can you dig up some speeds & feed info?
ca

How hard?

Assuming soft 150-200 HB:

Rough Turning - 450 SFM up to .015" per rev.
Finish Turning - 525 SFM
Single Point Threading - 90 SFM
Drilling HSSCO - 50 SFM Carbide - 125 SFM

You can also use cermets. Particularly if you are cutting it hard. Dead
soft it tends to be gummy and prone to tearing. Not at all unlike custom
455, 17-4PH, or 440C.

Chip control will be an issue, particularly finish turning and single point
threading.

[Cliff]

Post by D Murphy
Rough Turning - 450 SFM up to .015" per rev.
Finish Turning - 525 SFM
Single Point Threading - 90 SFM
Drilling HSSCO - 50 SFM Carbide - 125 SFM
You can also use cermets. Particularly if you are cutting it hard. Dead
soft it tends to be gummy and prone to tearing. Not at all unlike custom
455, 17-4PH, or 440C.

[
Turning, single point.
Covers the following alloys in this group of materials:
15-5 PH, 16-6 PH, 17-4 PH, 17-7 PH, 17-14 Cu Mo, AF-71, AFC-77,
Almar 362 (AM-362), AM-350, AM-365, AM-363, Custom 450,
Custom 455, HNM, PH 13-8 Mo, PH 14-8 Mo, PH 15-7 Mo and
Stainless W
Using inch units.
Using unbrazed Carbides

Hardness, Bhn Condition
150-200 solution treated
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 400 .007 C-7 525 .007 CC-7
.150 350 .015 C-6 450 .015 CC-6
.300 275 .030 C-6 350 .020 CC-6
.625 210 .040 C-6

Hardness, Bhn Condition
275-325 solution treated or hardened
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 350 .007 C-7 450 .007 CC-7
.150 300 .015 C-6 400 .015 CC-6
.300 240 .020 C-6 300 .020 CC-6

Hardness, Bhn Condition
325-375 solution treated or hardened
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 325 .005 C-7
.150 275 .010 C-6
.300 225 .015 C-6

Hardness, Bhn Condition
375-440 hardened
DOC Uncoated carbide Coated carbide
FPM IPR grade FPM IPR grade
.040 225 .005 C-7
.150 190 .010 C-6
.300 150 .015 C-6



Using Ceramic tools

Hardness, Bhn Condition
150-200 solution treated
DOC FPM IPR Type of Ceramic
.040 1500 .005 CPA
.150 1000 .010 CPA
.300 700 .015 HPC

Hardness, Bhn Condition
275-325 solution treated or hardened
DOC FPM IPR Type of Ceramic
.040 1100 .005 HPC
.150 600 .010 HPC
.300 400 .015 HPC

Hardness, Bhn Condition
325-375 solution treated or hardened
DOC FPM IPR Type of Ceramic
.040 1000 .004 HPC
.150 500 .008 HPC
.300 300 .012 HPC

Hardness, Bhn Condition
375-440 solution treated or hardened
DOC FPM IPR Type of Ceramic
.040 900 .004 HPC
.150 450 .008 HPC
.300 250 .012 HPC


Single point threading
Bhn 135-440
Diameter under 1"
Infeed per pass
First pass .015 Last pass .001
65-100 SFM for C-6 Carbide, 8-20 SFM for HSS (T15 or M42*)

Diameter 1 to 6"
Infeed per pass
First pass .015 Last pass .001
80-120 SFM for C-6 Carbide, 10-25 SFM for HSS (T15 or M42*)

* "Any premium HSS: T15, M33, M41-M43 or S9, S10, S11, S12"
]

Odd how that works out, eh?
Looks like the same data.
No better with more recent coated or ceramic tools?
The MDH data I quoted must be 30+ years old ...

[D Murphy]

Post by Cliff
Odd how that works out, eh?
Looks like the same data.
No better with more recent coated or ceramic tools?
The MDH data I quoted must be 30+ years old ...

Yup. If you are cutting low to medium carbon and alloy steel the speeds can
be a lot higher today than 30 years ago. But for Stainless and Titanium
I've found that nothing has changed much for plain old turning ops.

Every once in a while something like whisker reinforced ceramics comes
along which changed the speed possible for inconel and other nickel alloys.
But nothing revolutionary has come along for cutting stainless steels. Just
small incremental improvements in coatings.

I also find tooling and bar stock to be more consistant nowadays. Providing
you're not buying the cheapest you can find. So tool life is more
consistant. Jobs run better than they would have 30 years ago.

Although with the right Iscar cut off and grooving tools you can probably
run twice as fast as what the MDH says. Milling is much improved too.