A single-piece friction wedge for use in damping relative movement between a bolster and a side frame of a railroad car truck includes a generally horizontal bottom surface, a generally vertical front surface, and a back surface oriented at an acute primary angle with respect to the front surface. The back surface has first and second sloped surfaces which are angled toward each other.
Specification:
Hardness:39-48 HRC
Roughness of main friction side:Ra50
Inclination of Main friction side:2°30'±30’
Inclination of second friction side:45°±30'
Material:
| C | Si | Mn | P | S | Mg | Re | El (δ%) | R.A (ψ%) | T.S. (Mpa) | |
| ADI | 3.3-3.8 | 2.0-2.8 | 0.2-0.4 | ≤0.07 | ≤0.30 | 0.03-0.06 | 0.01-0.04 | ≥1 | 32 | ≥1400 |
Specification:
| Hardness | 39-48 HRC |
| Roughness of main friction side | Ra50 |
| Inclination of Main friction side | 2°30'±30' |
| Inclination of second friction side | 45°±30' |
