Mostly used in: Chain Pins, High Strength Screws, Hex Socket Cap Screw (Hex Bolts), High Strength Nuts, High Strength Bolts and Nuts (CHQ), Hex Washer Head Screw, Nuts (Hex, Square), Roller Chain, etc.
Chemical Component:
| C | Si | Mn | P | S | V | B |
10B21 | 0.18-0.23 | Under0.10 | 0.70-1.0 | under0.030 | under0.035 | - | above 0.0005 |