General Information for Material A-286
| Material Group |
S - Superalloys (Heat resistant and Titanium) |
| Sub-Group |
Superalloy |
| Hardness |
250.0 HB |
| Tensile Strength |
810 [N/mm^2] |
| Machinability Range |
40% |
MACHINABILITY OF A-286 MATERIAL
A-286 is an iron-based heat resistant superalloy (HRSA) material with a machinability rating of 40% and hardness of 250 HB.
A-286 has 56% iron, 25% nickel and additional alloying elements per the table below.
Iron-based superalloys are a more economical alternative to nickel-based alloys. They provide the same advantages but to a lesser extent and at a lower price. They are used mostly on less critical components that still require heat resistance properties. This sub-group is also much easier to machine realtive to the nickel and cobalt based superalloys.
Superalloys should be machined with a positive and sharp cutting edges. Geometries that are suitable for austenitic stainless steel will also work well on HRSA. However, quality manufacturers will have in their catalogs additional geometries that are specifically designed for these challenging materials.
SUMMARY:
For general Turning of Material A-286 at stable conditions use a grade with a Very hard substrate and PVD coating.
For general Milling use a grade with a Semi hard substrate and PVD coating.
For detailed carbide grades recommendations, check the table below.
Recommended Cutting speed range for turning at stable conditions is 440 - 610 [SFM] / 135 - 185 [m/min].
Recommended Cutting speed range for milling with stable clamping and short overhang is 330 - 460 [SFM] / 100 - 140 [m/min]
For detailed cutting speed recommendations, check the table below.
Equivalent International Designations for Material A-286
| Standard |
Name |
| SAE |
ASTM 368 |
| WNR |
1.4980 |
| DIN |
X5NiCrTi2515 |
| UNS |
UNS S66286 |
| BS |
HR 5152 |
| ANFOR |
Z06 NCT 25 |
Chemical Composition for Material A-286
| Element |
Amount |
| Iron (Fe) |
56% |
| Nickel (Ni) |
25% |
| Manganese (Mn) |
0.2% |
| Silicon (Si) |
| 0.2% |
| Carbon (C) |
0.05% |
| Chromium (Cr) |
14.5% |
| Titanium (Ti) |
2.1% |
| Molybdenum (Mo) |
1.3% |
| Aluminum (Al) |
0.2% |
Cutting Speeds Recomendations for Material A-286
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
135-185 |
440-610 |
| Milling |
100-140 |
330-460 |
| Parting |
85-115 |
280-380 |
| Grooving |
120-160 |
390-520 |
| Drilling |
120-160 |
390-520 |
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.
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Material A-286
| Honing Size |
0.02-0.05 mm / 0.001-0.002" |
| Rake Angle |
13° -18° |
| Land Angle |
Neutral |
| Land Width |
0.10-0.20 mm / 0.004-0.008" |
| Ground Insert |
Recommended |
