| Ceramic & Silicon Nitride Machining Recommendations |
| R=Roughing | SR=Semi-Roughing | SF=Semi-Finishing | F=Finishing |
Turning & Boring
| Material | Operation | Recommended Grade | Speed (SFM) | Feed (IPR) | DOC (maximun) |
| Low
Carbon Steels <Rc56 |
R, SR F, SF |
CC-10, CC-20
(thicker inserts) CC-10, CC-20 |
300-2,300 300-4,000 |
.012-.024 .003-.030 |
.060 .020 |
| Alloy Steels <Rc56 |
R, SR F, SF |
CC-10, CC-20
(thicker inserts) CC-10, CC-20 |
200-2,200 600-4,000 |
.010-.020 .003-.030 |
.060 .020 |
| Hardened
Steels; Chilled Cast Iron >Rc56 |
F, SF F, SF |
CC-30 CC-30-C |
200-700 200-700 |
.003-.010 .003-.010 |
.020 .040 |
| Cast
Iron |
R, SR F, SF |
CC-5XX CC-20, CC-5XX |
500-5,000 800-5,000 |
.010-.025 .003-.025 |
.250 .050 |
| Ductile / Nodular Iron | R, SR F, SF |
CC-5XX CC-20, CC-5XX |
500-2,000+ 500-2,500 |
.010-.025 .003-.025 |
.150 .040 |
| Ni-based
alloys; Non-ferrous metals |
R, SR SF, F |
CC-547 CC-547, CC-20 |
500-850 500-1,500 |
.008-.016 .004-.008 |
.150 .040 |
Milling
| Material | Operation | Recommended Grade | Speed (SFM) | Feed (IPR) |
| Cast Iron | R, SR F, SF |
CC-5XX CC-20, CC-5XX |
300-4,000 500-5,000 |
.004-.006 .002-.004 |
| Ductile / Nodular Iron | R, SR F, SF |
CC-5XX CC-5XX |
300-2,500 650-5,000 |
.002-.006 .002-.004 |
| Ceramic Comparison Chart |
| ROMAY | CC-10 | CC-20 | CC-30 | CC-30-C |
| Greenleaf | GEM 1 & 9 |
GEM 2 & 3 |
GEM 2 & 3 |
|
| Iscar | ||||
| Kennametal | K-060 | K-090 | K-090 | Kyon 4400 |
| Kyocera (Ceratip) |
SN-56 SN-60 & 80 |
A-65 CER II |
A-65 CER II |
A66N |
| NTK | CX-3 HC-1 |
HC-2 HC-6 |
HC-5 | ZC-4 |
| SPK | SN-60 SN-80 |
SH-20-F | SH-1 | |
| Sandvick | CC-620 | CC-650 | CC-650 | |
| Sumitomo | W-80 | NB-90-S | NB-90-S | |
| Toshiba | LX-A | LX-21 | LX-21 | LX-11 |
| Valenite | Q-44 | Q-32 | Q-32 |
| Silicon Nitride Comparison Chart |
| Competitor Grades | Romay Grade - 1st choice: | Romay Grade - 2nd choice: |
| Kyon 2000, Kyon 2100 | CC-5477 | |
| Kyon 3000 | CC-514 | CC-5126 |
| Kyon 3500 | CC-514 | CC-513 |
| Sandvick 690 | CC-514 | CC-513 |
| Sandvick 1690 | CC-5143 | CC-514 |
| Sandvick 6090 | CC-514 | CC-515 |
| NTK Sx5 | CC-5477 | |
| NTK Sx8 | CC-514 | CC-513 |
| NTK SP1 | CC-5143 | CC-514 |
| NTK SP2 | CC-5143 | CC-514 |
| Toshiba FX-105 | CC-514 | CC-515 |
| MW - 43 | CC-514 | CC-515 |
| Ceratip KS-6000 | CC-513 | CC-514 |
| Valenite Q6 | CC-514 | CC-513 |
| Valenite Q65 | CC-515 | CC-5126, CC-513 |
| SPK SL-100, SL-150, SL-200 | CC-5126 | |
| SPK SL-250 | CC-514 | CC-513 |
| SPK SL-500 | CC-514 | CC-515 |
| SPK SL-250-C | CC-5143 |
| Properties Chart for all Ceramic & Silicon Nitride Grades |
| Grades | Density (G/cm3) | Hardness (HRA) | T.R.S (MPa) | Fracture Toughness MPa |
| CC-10 | 4.0 | 94.6 | 650 | 4.5 |
| CC-20 | 4.2 | 94.2 | 750 | 5 |
| CC-30 | 4.3 | 94.5 | 700 | 5 |
| CC-513 | 3.14 | 91.0 | 6.0 | |
| CC-514 | 3.6 | 91.2 | 6.0 | |
| CC-515 | 3.12 | 91.4 | 6.0 | |
| CC-5126 | 3.22 | 91.0 | 5.5 | |
| CC-5477 | 3.51 | 91.5 | 6.5 |
