Description
Technical Parameters
Railway E Clips - Material & Manufacturing Process Parameters
| Material Grade | Chemical Composition (Wt. %) | Heat Treatment Process | Mechanical Properties | Manufacturing Tolerance | Quality Inspection Method |
|---|---|---|---|---|---|
| 60Si2MnA (China) | C: 0.56-0.64; Si: 1.50-2.00; Mn: 0.60-0.90; P≤0.035; S≤0.035 | Quenching (860-880℃, water cooling) + Tempering (420-440℃, air cooling) | Tensile Strength: ≥1570MPa; Yield Strength: ≥1370MPa; Hardness: HRC 45-50 | Height: ±0.3mm; Leg Thickness: ±0.2mm | 1. Spectrometer (chemical composition); 2. Brinell hardness tester; 3. Digital caliper (dimensions) |
| 55SiMnMo (EU) | C: 0.52-0.60; Si: 0.60-0.90; Mn: 1.00-1.30; Mo: 0.15-0.25; P≤0.030; S≤0.025 | Quenching (850-870℃, oil cooling) + Tempering (400-420℃, air cooling) | Tensile Strength: ≥1450MPa; Yield Strength: ≥1250MPa; Hardness: HRC 43-48 | Height: ±0.4mm; Leg Thickness: ±0.3mm | 1. X-ray fluorescence (composition); 2. Rockwell hardness tester; 3. Coordinate measuring machine (CMM) |
| AISI 9260 (USA) | C: 0.56-0.64; Si: 1.80-2.20; Mn: 0.70-1.00; P≤0.035; S≤0.040 | Quenching (870-890℃, water cooling) + Tempering (430-450℃, air cooling) | Tensile Strength: ≥1600MPa; Yield Strength: ≥1400MPa; Hardness: HRC 46-51 | Height: ±0.3mm; Leg Thickness: ±0.2mm | 1. Optical emission spectrometer; 2. Vickers hardness tester; 3. Laser measuring instrument |
| SUP9 (Japan) | C: 0.56-0.64; Si: 1.50-2.00; Mn: 0.60-0.90; P≤0.030; S≤0.030 | Quenching (860-880℃, water cooling) + Tempering (420-440℃, air cooling) | Tensile Strength: ≥1550MPa; Yield Strength: ≥1350MPa; Hardness: HRC 44-49 | Height: ±0.3mm; Leg Thickness: ±0.2mm | 1. Atomic absorption spectrometry; 2. Shore hardness tester; 3. Digital micrometer |
Railway E Clips - Key Differences Across Regional Standards
| Regional Standard | Typical Model | Design Focus | Corrosion Resistance Requirement | Installation Allowance | Service Life Guarantee |
|---|---|---|---|---|---|
| GB/T 12611 (China) | E16, E20 | High load-bearing capacity for heavy rails (43-60kg/m) | Neutral salt spray test: ≥500h (no red rust) | E clip-rail gap: ≤0.8mm | ≥15 years (under normal railway operation) |
| UIC 864-3 (Int'l) | E18, E22 | Compatibility with multi-country rail systems | Neutral salt spray test: ≥600h (no red rust) | E clip-rail gap: ≤0.6mm | ≥20 years (under standard maintenance) |
| AREMA (USA) | E15, E24 | Adaptability to high-temperature environments (desert/rail yards) | Neutral salt spray test: ≥400h (no red rust); High-temperature resistance (80℃, 1000h no deformation) | E clip-rail gap: ≤1.0mm | ≥12 years (under heavy freight operation) |
| BS EN 13146 (EU) | E21, E23 | Environmental friendliness (low heavy metal content) | Neutral salt spray test: ≥550h (no red rust); Heavy metal content (Pb≤0.1%, Cd≤0.01%) | E clip-rail gap: ≤0.7mm | ≥18 years (under passenger/freight mixed operation) |
| JIS E 1107 (Japan) | E17, E19 | Vibration resistance for high-speed railways (≤300km/h) | Neutral salt spray test: ≥500h (no red rust); Vibration test (10-500Hz, 10⁶ cycles no loosening) | E clip-rail gap: ≤0.5mm | ≥16 years (under high-speed operation) |
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