General Information for Stainless Steel 317
| Material Group |
M - Stainless Steel |
| Sub-Group |
Austenitic Stainless Steel |
| Tensile Strength |
490-690 [N/mm^2] |
| Machinability Range |
38% |
MACHINABILITY OF 317 STAINLESS STEEL
Stainless steel 317 is an austenitic stainless-steel alloy with 19% chromium and 13% nickel.
It is a chromium-nickel-molybdenum stainless with low carbon (0%) content. The low carbon content combined with high chromium/nickel/molybdenum amount results in soft material with high resistance to machining and a low machinability rating of 38%.
The main challenge in machining austenitic stainless is the low carbon content combined with high chromium/nickel content. The result is a soft material with high resistance to machining. Because of the high ductility, you should generally opt for a sharp and positive cutting edge. In turning operations, one of the most common reasons for short tool-life is notch wear forming at the depth of the cut line, which results in a large burr forming on the workpiece. The best method to prevent notch wear is to change the depth of the cut constantly.
SUMMARY:
For general Turning of Stainless Steel 317 at stable conditions use a grade with a Semi Hard substrate and Thin CVD coating.
In case you are running at a cutting speed that is lower than 390 SFM (120 m/min), it is better to use a grade with a Semi Hard substrate and PVD coating.
For general Milling use a grade with a Semi Hard substrate and Thin PVD coating.
For detailed carbide grades recommendations, check the table below.
Recommended Cutting speed range for turning at stable conditions is 460 - 620 [SFM] / 140 - 190 [m/min].
Recommended Cutting speed range for milling with stable clamping and short overhang is 300 - 390 [SFM] / 90 - 120 [m/min]
For detailed cutting speed recomendations, check the table below.
Equivalent International Designations for Stainless Steel 317
| Standard |
Name |
| sae |
317 |
| wnr |
1.4449 |
| din |
X5CrNiMo17-13 |
| bs |
317S16 |
Chemical Composition for Stainless Steel 317
| Element |
Amount |
| Chromium (Cr) |
19% |
| Nickel (Ni) |
13% |
| Molybdenum (Mo) |
3.50% |
| Manganese (Mn) |
1.00% |
| Silicon (Si)) |
1.00% |
| Carbon (C) |
0.02% |
| Phosphorus (P) |
0.02% |
| Sulfur (S) |
0.02% |
Cutting Speeds Recomendations for Stainless steel - Austenitic
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
140-190 |
460-620 |
| Milling |
90-120 |
300-390 |
| Parting |
55-75 |
180-250 |
| Grooving |
85-115 |
280-380 |
| Drilling |
40-55 |
130-180 |
Important! The speed estimation is given for an ideal situation:
- Most suitable carbide grade
- Stable tool clamping
- Stable workpiece clamping
- Good quality raw material
- A short overhang of the cutting tool.
- Nominal hardness of the material.
- etc.
Recommended Carbide Grades for Stainless Steel 317
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Stainless Steel 317
| Honing Size |
0.03-0.05 mm / 0.001-0.002" |
| Rake Angle |
9°-11° |
| Land Angle |
Positive |
| Land Widt |
0.20-0.30 mm / 0.008-0.012" |
