General Information for Stainless Steel 15-5PH
| Material Group |
M - Stainless Steel |
| Sub-Group |
Austenitic Stainless Steel |
| Tensile Strength |
1400 [N/mm^2] |
| Machinability Range |
45% |
Machining Stainless Steel 15-5PH
15-5PH is a martensitic chromium-nickel stainless steel containing precipitation-hardening elements such as copper, niobium, and tantalum.
Its cracks resistance, corrosion resistance, and strength are better than the regular martensitic chromium-type stainless steel (400 series).
It is used in applications requiring high strength and a modest level of corrosion resistance. For example pump shafts, oil & gas components, and mechanical seals.
The machinability of 15-5PH depends on its hardness. In 'condition A' (the most commonly supplied) it has a machinability rating of 45% (Similar to 420), however, in many cases, it is machined after heat treatment, and the machinability becomes much lower.
| Hardness (HB) |
Hardness (HRC) |
Machinability (%) |
| 250 (Condition A) |
24 |
45% |
| 300 |
32 |
39% |
| 350 |
38 |
32% |
Summary:
For general Turning of Stainless Steel 15-5PH 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 Below Chart, or use the Grades Wizrad.
Recommended Cutting speed range for turning at stable conditions is 540 - 740 [SFM] / 165 - 225 [m/min].
Recommended Cutting speed range for milling with stable clamping and short overhang is 340 - 460 [SFM] / 105 - 140 [m/min]
For detailed cutting speed recomendations, check the Below Table, or use our Speed and Feed Calculator.
Equivalent International Designations for Stainless Steel 15-5PH
| Standard |
Name |
| sae |
15-5 |
| wnr |
1.4540 |
| din |
X4CrNiCuNb16.4 |
| uns |
UNS S15500 |
| anfor |
Z6CNU15.05 |
Chemical Composition for Stainless Steel 15-5PH
| Element |
Amount |
| Chromium (Cr) |
14.8% |
| Nickel (Ni) |
4.5% |
| Copper (Cu) |
3.5% |
| Silicon (Si) |
0.50% |
| Manganese (Mn) |
0.50% |
| Carbon (C) |
0.03% |
| Phosphorus (P) |
0.02% |
| Sulfur (S) |
0.02% |
Cutting Speeds Recomendations for Stainless steel - Martensitic
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
165-225 |
540-740 |
| Milling |
105-140 |
340-460 |
| Parting |
65-90 |
210-300 |
| Grooving |
100-135 |
330-440 |
| Drilling |
50-65 |
160-210 |
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 15-5PH
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Stainless Steel 15-5PH
| 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" |
