Material Group | K - Cast Iron |
Sub-Group | Cast Iron |
Hardness | 187.5 HB |
Tensile Strength | 730 [N/mm^2] |
Machinability Range | 730 [N/mm^2] |
GGG-40 is a nodular cast iron material with a machinability rating of 140% and hardness 188 HB.
Nodular cast iron is a popular sub-group since it provides a good balance between the extremely brittle grey cast iron and the more ductile malleable type.
In cast iron, the material standards also define the allowed hardness range, and hardness is the top-ranking factor affecting the machinability ratings. For example, nodular cast iron is known to be harder to machine compared with grey cast iron. However, if a grey cast iron alloy has a hardness of 300HB is will have lower machinability than nodular cast iron with 200HB.
Cast iron is very brittle and produces short chips. Therefore, there is no need for a sharp cutting edge, and a strong geometry with a large honing or K-land is the best choice.
Standard | Name |
---|---|
SAE | 60-40-18 |
WNR | 0.7040 |
DIN | GGG-40 |
SS | 0717-02 |
BS | 420/12 |
ANFOR | FGS 400-12 |
UNI | GS 400-12 |
UNF | FGE 38-17 |
JS1 | FCD 40 |
Sorry, Not Availble for this Material
Application | Vc (m/min) | Vc (SFM) |
---|---|---|
Turning | 275-370 | 900-1210 |
Milling | 185-250 | 610-820 |
Parting | 135-185 | 440-610 |
Grooving | 190-260 | 620-850 |
Drilling | 155-210 | 510-690 |
Honing Size | 0.05-0.10 mm / 0.002-0.004" |
Rake Angle | 0° -0° |
Land Angle | Negative |
Land Width | 0.30-0.40 mm / 0.012-0.016" |