| STANDARD | TECHNICAL AGREEMENT |
| APPLICATION | FOR THE MANUFACTURE OF AXLE |
| DIMENSION TOLERANCE | ACCORDING TO THE TECHNICAL AGREEMENT |
| APPLICATION | STEEL GRADE | OD/mm | WT/mm |
|---|---|---|---|
| BEARING AXLE PIPE | 20Mn2/SAE1527 | 127/133/146/152 178/194/219 | 8/9/10/12/14 16/18/22/24 |
| DRMNG AXLE PIPE | Q345B | 180/194/203/219 | 14/16/18 |
NOTE： we can adjustment the chemical composition and specification as per customer’s requirements
STEEL GRADE AND CHEMICAL COMPOSITION
| STEEL GRADE | CHEMICAL COMPOSITION | |||||
| 20Mn2 | C | Si | Mn | |||
| 0.17-0.24 | 0.17-0.37 | 1.40-1.80 | ||||
| STEEL TYPE | P | S | Cu | Cr | Ni | Mo |
| No more than (％) | ||||||
| QUALITY STEEL | 0.035 | 0.035 | 0.30 | 0.30 | 0.30 | 0.15 |
| HIGH-QUALITY STEEL | 0.25 | 0.025 | 0.25 | 0.30 | 0.30 | 0.10 |
| premium quality steel | 0.025 | 0.015 | 0.25 | 0.30 | 0.30 | 0.10 |
| STEEL GRADE | C | Si | Mn | P | S | Ni | Cr | Nb | Cu | Mo | V | AL |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Q345A | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.030 | ≤0.030 | ≤0.50 | ≤0.30 | ≤0.07 | ≤0.03 | 0.10 | 0.15 | - |
| Q345B | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.030 | ≤0.030 | ≤0.50 | ≤0.30 | ≤0.07 | ≤0.03 | 0.10 | 0.15 | - |
| Q345C | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.030 | ≤0.030 | ≤0.50 | ≤0.30 | ≤0.07 | ≤0.03 | 0.10 | 0.15 | ≤0.015 |
| Q345D | ≤0.18 | - | - | ≤0.030 | ≤0.025 | ≤0.50 | ≤0.30 | ≤0.07 | ≤0.03 | 0.10 | 0.15 | ≤0.015 |
| Q345E | ≤0.18 | - | - | ≤0.025 | ≤0.020 | ≤0.50 | ≤0.30 | ≤0.07 | ≤0.03 | 0.10 | 0.15 | ≤0.015 |