General Information for Stainless Steel 439 HP
| Material Group |
M - Stainless Steel |
| Sub-Group |
Martensitic Stainless Steel |
| Tensile Strength |
568-818 [N/mm^2] |
| Machinability Range |
35% - 90% |
Equivalent International Designations for Stainless Steel 439 HP
| Standard |
Name |
| UNS |
UNS S43035 |
Chemical Composition for Stainless Steel 439 HP
| Element |
Amount |
| Iron (Fe) |
81% |
| Chromium (Cr) |
18% |
| Silicon (Si) |
0.55% |
| Molybdenum (Mo) |
0.45% |
| Titanium (Ti) |
0.4% |
| Nickel (Ni) |
0.23% |
| Phosphorus (P) |
0.02% |
| Carbon (C) |
0.012% |
| Sulfur (S) |
0.001% |
Cutting Speeds Recommendations for Stainless Steel - Martensitic
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
155-395 |
510-1300 |
| Milling |
95-250 |
310-820 |
| Parting |
60-160 |
200-520 |
| Grooving |
90-235 |
300-770 |
| Drilling |
45-115 |
150-380 |
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 over hang of the cutting tool.
- Nominal hardness of the material.
- etc.
Recommended Carbide Grades for Stainless Steel 439 HP
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Stainless Steel 439 HP
| 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" |
