Carbide Bit
Susun Engineering and Manufacturing Company is a major China-based manufacture of carbide bit. We are able to provide more than 50 different types of carbide drill bits, which are of high quality and fair price. A carbide bit consists of body, tip and spring adapter.
1. Body of carbide bits
1) Material: Chinese steel grade 40Cr. With very similar chemic and mechanical properties as DIN grade 41Cr4/42Gr4 (Germany), BS grade 41Cr4 (British), NF grade 38Cr4/41Cr4 (France), UNI grade 41Cr4 (Italy), NBN grade 42Cr4 (Belgium), SS grade 2245 (Switzerland), AISI/SAE/ASTM 5140 (USA), JIS grade SCr440 (H)/SCr440 (Japan, ISO grade 41Cr4. You can find more details about the chemic and mechanical properties below.
2) Producing process: Forging and machining.
3) Hardness: Up to HRC 52 after heat treatment.
2. Tip of carbide bits
1) Material: Chinese steel grade YG6, YG8, YG10. They are all Tungsten alloys. They are a little different from the content of WC and Co, and also the hardness and bending strength are different. You can find more details about the chemic and mechanical properties below.
2) Producing process: Forging, rolling and drawing. Weld to the round groove on top of the head of body.
3) Hardness: Up to HRA 95 after heat treatment.
3. Spring Adapter of carbide bits
1) Material: Chinese steel grade 65Mn. It is a spring steel. You can find more details about the chemic and mechanical properties below.
2) Producing process: Punching, heat treating and black oxide coating.
3) Hardness: Up to HRC 42-48 after heat treatment.
Chemic and Mechanical Properties
| Material | C% | Si% | Mn% | P% | S% | Cr% | σb/MPa | σs/MPa | δ5/% |
| 40Cr | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | - | - | 0.80-1.10 | >980 | >785 | 9 |
| 65Mn | 0.62-0.70 | 0.17-0.37 | 0.90-1.20 | ≤0.035 | ≤0.035 | ≤0.25 | >735 | >430 | 8 |
| Material | WC% | TiC% | TaC% | Co% | HRA | σbb/MPa | ak/(J/cm2) |
| YG6 | 94 | - | - | 6 | 89.5 | 1450 | 2.6 |
| YG8 | 92 | - | - | 8 | 89 | 1500 | 2.5 |
| YG10 | 90 | - | - | 10 | 91.5 | 2200 | - |
In addition to carbide bits, we also produce all kinds of sheet piles, castings, bucket teeth and adapters, the pedestal of drill bits, and so on. Our products are of high quality and competitive prices, and are exported to Germany, Britain, the Netherlands and Australia, the United States, Saudi Arabia, South Korea, Canada, Spain and France, and other countries.
Thanks for your visit to Susun Engineering and Manufacturing Company. We welcome you to try our products, and look forward to working with you.
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