What materials are commonly used to manufacture E Type Rail Elastic Clips?
The manufacturing of E-type rail elastic clips primarily utilizes high-performance spring steel materials, with 60Si2MnA spring steel being the most common choice due to its excellent comprehensive mechanical properties.
The chemical composition of 60Si2MnA is precisely proportioned, with carbon content controlled between 0.56%-0.64%, silicon content maintained at 1.60%-2.00%, manganese content at 0.60%-0.90%, while strictly limiting harmful elements such as phosphorus and sulfur to no more than 0.03%. This composition design enables the material to achieve an ideal elastic limit and fatigue strength after heat treatment, fully meeting the stringent durability requirements for railway fasteners.
| Item | E Clip Fasteners | |||
| Chemical Composition | 60Si2MnA | 60Si2CrA | 55Si2Mn | 38Si7 |
| C:0.56-0.64, Mn:060-0.90, Si:1.50-2.00, Cr:≤0.35, P:≤0.03, S:≤0.03 | C:0.56-0.64, Mn:0.40-0.70, Si:1.40-1.80, Cr:0.70-1.00 P:≤0.03, S:≤0.03 | C:0.52-0.60, Mn:0.60-0.90, Si:1.50-2.00, Cr:≤0.35 P:≤0.03, S:≤0.03 | C:0.35-0.42, Mn:0.50-0.80, Si:1.50-1.80, P:≤0.03, S:≤0.03 | |
| Hardness | 44-48 HRC | |||
| Fatigue Life | 3-5 million cycles without breaking | |||
| Surface | Plain Oiled, Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro coating, Color Painting | |||
| Standard | UIC, AREMA, BS, RDSO, DIN, JIS, ISCR, VALEC, GOSTR- EASC, GB/T or other upon requirements | |||
| Package | Moven Bag, Pallet | |||
| Delivery | Depends on order | |||
Besides 60Si2MnA, several other spring steels are also commonly used in the manufacture of E-type clips. 60Si2CrA adds 0.70%-1.00% chromium based on 60Si2MnA, significantly improving the material's hardenability and temper resistance, making the product's performance more stable in extreme environments. 55Si2Mn adjusts the carbon content to 0.52%-0.60%, providing better toughness reserve while maintaining sufficient strength. Meanwhile, 38Si7, as a medium-carbon silicon-manganese steel, controls its carbon content at 0.35%-0.42% and silicon content at 1.50%-1.80%. This composition makes it particularly suitable for manufacturing fastener products requiring high toughness and plasticity.
These spring steel materials must undergo strict heat treatment processes to meet usage requirements. The typical process includes two key steps: quenching and tempering.
By precisely controlling the heating temperature, holding time, and cooling rate, the material forms a tempered troostite microstructure, ultimately stabilizing the hardness within the 44-48 HRC range. This microstructure ensures the clip possesses both high elasticity and good toughness, enabling it to maintain lasting clamping force while withstanding immense alternating loads.
GNEE RAIL strictly adheres to international standards when selecting materials, ensuring every batch of raw material undergoes spectroscopic analysis and mechanical property testing, guaranteeing product reliability and consistency from the source.
