General Information for Stainless Steel 302
| Material Group |
M - Stainless Steel |
| Sub-Group |
Austenitic Stainless Steel |
| Tensile Strength |
[N/mm^2] |
| Machinability Range |
47% |
MACHINABILITY OF 302 STAINLESS STEEL
Stainless Steel 302 is an austenitic stainless steel alloy with 19.5% chromium and 7.5% nickel.
SUMMARY:
For general Turning of Stainless Steel 302 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 570 - 770 [SFM] / 175 - 235 [m/min].
Recommended cutting speed range for milling with stable clamping and short over hang is 360 - 490 [SFM] / 110 - 150 [m/min]
For detailed cutting speed recomendations, check the table below.
Equivalent International Designations for Stainless Steel 302
| Standard |
Name |
| sae |
302 |
| wnr |
1.4319 |
| din |
X12CrNi18-9 |
| bs |
302S31 |
| ss |
2330 |
| anfor |
Z10CN18.09 |
| uni |
X10CrNi18 09 |
| unf |
F.314 |
Chemical Composition for Stainless Steel 302
| Element |
Amount |
| Chromium (Cr) |
19.5% |
| Nickel (Ni) |
7.5% |
| Silicon (Si) |
2% |
| Manganese (Mn) |
2% |
| Molybdenum (Mo) |
1.5% |
| Carbon (C) |
0.3% |
| Phosphorus (P) |
0.05% |
| Sulfur (S) |
0.05% |
Cutting Speeds Recomendations for Stainless steel - Austenitic
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
175-235 |
570-770 |
| Milling |
110-150 |
360-490 |
| Parting |
70-95 |
230-310 |
| Grooving |
105-140 |
340-460 |
| Drilling |
50-70 |
160-230 |
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 302
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Stainless Steel 302
| Honing Size |
0.03-0.05 mm / 0.001-0.002" |
| Rake Angle |
9°-11° |
| Land Angle |
Positive |
| Land Width |
0.20-0.30 mm / 0.008-0.012" |
