Active Member
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[China]
Address: Boyun Innovation Industrial Zone, 346# Leifeng Ave,Yuelu Distric,Changsha,Hunan,China
Contact name:Lyu
Hunan Boyun-Dongfang Powder Metallurgy Co., Ltd |
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Carbide Rings Grade MD40A for Punch (Stacking Punchs Type A)
High performance cemented carbides for molding；Standard Specification For Square Material and Standard Specifications Of The Rings. Also we can produce the your drawing of ring.
Polarization curve (corrosion current reduced, corrosion rate decreased significantly, corrosion resistance improved significantly)
| Grade | Co% | WC Grain size | Hardness | Density | Flexural Strength | Fracture Toughness | Elastic Modulus | Coefficient of Thermal Expansion | |
| HRA | HV30 | g/cm3 | MPa | N/mm2 | GPa | 10-6/℃ | |||
| MD40B | 12 | Fine | 89.5 | 1380 | 14.2 | 3800 | 17 | 470 | 5.7 |
| MD40C | 12 | Fine | 89.7 | 1400 | 14.1 | 3800 | 16 | 470 | 5.7 |
| MD40A | 12 | Medium | 88.9 | 1310 | 14.2 | 3700 | 27 | 470 | 5.7 |
| MD45A | 15 | Medium | 87.9 | 1200 | 13.9 | 3600 | - | 430 | 6.3 |
| TYPE A | ||||||||||||
| t±0.002 | B±0.002 | L+0.5 +0.3 | l1 | l2 ±0.02 | ||||||||
| 1.0 | 3 | 55 | 18 | 18,20 | ||||||||
| 1.2 | 3 | 55,60 | 18,20 | 18,20 | ||||||||
| 1.5 | 3 | 60 | 20 | 20 | ||||||||
| 1.0 | 4 | 55 | 18 | 18,20 | ||||||||
| 1.2 | 4 | 55,60 | 18,20 | 18,20 | ||||||||
| 1.5 | 4 | 60 | 20 | 20 | ||||||||
| 1.0 | 5 | 55 | 18 | 18,20 | ||||||||
| 1.2 | 5 | 55,60 | 18,20 | 18,20 | ||||||||
| 1.5 | 5 | 60 | 20 | 20 | ||||||||
