Our Railway Service SMC and BMC Compression Molded Parts are designed to deliver exceptional performance in demanding applications. With a density range of 1.75–1.95 g/cm³, these parts offer a lightweight yet durable solution, ideal for transportation systems. You can rely on their excellent water absorption resistance, maintaining <20 mg absorption, and minimal shrinkage (≤0.15%). These materials provide superior impact strength and flexural strength, exceeding 90 kJ/m² and 170 MPa, respectively, ensuring longevity and reliability even in harsh conditions.
You’ll also appreciate the high heat distortion temperature (≥240°C) and impressive dielectric strength (≥12.0 MV/m) for safe electrical insulation. With excellent insulation resistance, these parts maintain durability under normal conditions and even after prolonged water exposure. Additionally, the high arc resistance (≥150 S) and flame retardancy (FV0) ensure safety in railway applications.
Our SMC and BMC parts are available in a range of colors, including white, orange, and grey, ensuring they fit seamlessly into your design requirements while offering a smooth, high-quality finish.
Properties | Material | Sheet Molding Compounds | Dough Molding Compounds | |||||
Types | Unit | SMC-A | SMC-B | SMC-C | DMC-A | DMC-B | DMC-C | |
Density | g/cm³ | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | |
Water absorption | mg | ≤20 | ≤20 | - | ≤20 | ≤20 | - | |
Mould shrink rate | % | ≤0.15 | ≤0.15 | ≤0.30 | ≤0.15 | ≤0.15 | ≤0.30 | |
Heat distortion temp | ℃ | ≥240 | ≥240 | ≥220 | ≥240 | ≥240 | ≥220 | |
Impact strength charpy | kJ/m² | ≥90 | ≥60 | ≥45 | ≥30 | ≥25 | ≥20 | |
Flexural strength | MPa | ≥170 | ≥150 | ≥135 | ≥90 | ≥80 | ≥70 | |
Insulation resistance | Under normal conditions | Ω | ≥1.0×10¹³ | ≥1.0×10¹³ | ≥1.0×10¹² | ≥1.0×10¹³ | ≥1.0×10¹³ | ≥1.0×10¹² |
Impregnated water after 24h | ≥1.0×10¹² | ≥1.0×10¹² | - | ≥1.0×10¹² | ≥1.0×10¹² | - | ||
Dielectric strength (in 90℃ transformer oil) | MV/m | ≥12.0 | ≥12.0 | ≥10.0 | ≥12.0 | ≥12.0 | ≥10.0 | |
Medium loss factor (1MHz) | - | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | - | |
Relative dielectric coeff (1MHz) | - | ≤4.5 | ≤4.5 | ≤4.5 | ≤4.5 | ≤4.5 | - | |
Arc resistance | S | ≥180 | ≥150 | ≥180 | ≥180 | ≥180 | ≥180 | |
Proof tracking index (PTI) | V | ≥600 | ≥600 | ≥600 | ≥600 | ≥600 | ≥600 | |
Flame retardant | Grand | FV0 | FV0 | - | FV0 | FV0 | - | |
Temperature index | - | 155 | 155 | 130 | 155 | 155 | 130 | |
Appearance & Color | - | Smooth surface, no air bubble and crack, no sundries. Available color: white, orange, grey and other colors as required. | ||||||
Superior Strength-to-Weight Ratio:
SMC and BMC parts are substantially lighter than steel or aluminum components while maintaining high mechanical strength. This weight reduction directly contributes to greater energy efficiency and lower operational costs for trains.
High Mechanical Properties:
With exceptional flexural strength, impact strength, and stiffness, these materials can withstand constant vibrations, mechanical stress, and impact, ensuring long-term durability in railway environments.
Excellent Electrical Insulation:
Both materials have high dielectric strength and electrical insulation properties, making them critical for components in high-voltage areas. They prevent electrical arcing and ensure the safety of both equipment and personnel.
Dimensional Stability:
SMC and BMC parts have low shrinkage and a low coefficient of thermal expansion, which means they maintain their precise shape and size over a wide range of temperatures. This is vital for complex parts that require tight tolerances.
Flame and Smoke Resistance:
A crucial safety requirement in mass transit, these materials are formulated to be flame-retardant (often meeting FV0 ratings) and produce low smoke and toxicity when exposed to fire.
Corrosion and Chemical Resistance:
Unlike metal, SMC and BMC are highly resistant to corrosion from water, chemicals, and harsh environmental factors, which reduces maintenance and extends the lifespan of components.
Design Freedom:
The compression molding process allows for the creation of complex, multi-functional parts in a single piece, which can consolidate multiple metal components into one, simplifying assembly and reducing overall system costs.
SMC and BMC parts are used extensively throughout the interior and exterior of trains and railway infrastructure.
1. Interior Components:
Due to their flame and smoke resistance, they are ideal for train seats and seat frames, interior cladding panels, and luggage racks. Their durability also makes them suitable for flooring, ceilings, and other internal fittings.
2. Exterior Components:
The materials' weatherability, high strength, and lightweight properties make them perfect for train noses, side panels, and aerodynamic fairings.
3. Electrical Infrastructure:
Their superior electrical properties are utilized in critical trackside and on-board applications such as third rail insulators, cable brackets, cable trays, and traction motor brush holders.
4. Structural Parts:
They are also used for various structural components like switch machine insulation pads and other parts that require a combination of strength and insulation.
Our Railway Service SMC and BMC Compression Molded Parts are designed to deliver exceptional performance in demanding applications. With a density range of 1.75–1.95 g/cm³, these parts offer a lightweight yet durable solution, ideal for transportation systems. You can rely on their excellent water absorption resistance, maintaining <20 mg absorption, and minimal shrinkage (≤0.15%). These materials provide superior impact strength and flexural strength, exceeding 90 kJ/m² and 170 MPa, respectively, ensuring longevity and reliability even in harsh conditions.
You’ll also appreciate the high heat distortion temperature (≥240°C) and impressive dielectric strength (≥12.0 MV/m) for safe electrical insulation. With excellent insulation resistance, these parts maintain durability under normal conditions and even after prolonged water exposure. Additionally, the high arc resistance (≥150 S) and flame retardancy (FV0) ensure safety in railway applications.
Our SMC and BMC parts are available in a range of colors, including white, orange, and grey, ensuring they fit seamlessly into your design requirements while offering a smooth, high-quality finish.
Properties | Material | Sheet Molding Compounds | Dough Molding Compounds | |||||
Types | Unit | SMC-A | SMC-B | SMC-C | DMC-A | DMC-B | DMC-C | |
Density | g/cm³ | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | 1.75-1.95 | |
Water absorption | mg | ≤20 | ≤20 | - | ≤20 | ≤20 | - | |
Mould shrink rate | % | ≤0.15 | ≤0.15 | ≤0.30 | ≤0.15 | ≤0.15 | ≤0.30 | |
Heat distortion temp | ℃ | ≥240 | ≥240 | ≥220 | ≥240 | ≥240 | ≥220 | |
Impact strength charpy | kJ/m² | ≥90 | ≥60 | ≥45 | ≥30 | ≥25 | ≥20 | |
Flexural strength | MPa | ≥170 | ≥150 | ≥135 | ≥90 | ≥80 | ≥70 | |
Insulation resistance | Under normal conditions | Ω | ≥1.0×10¹³ | ≥1.0×10¹³ | ≥1.0×10¹² | ≥1.0×10¹³ | ≥1.0×10¹³ | ≥1.0×10¹² |
Impregnated water after 24h | ≥1.0×10¹² | ≥1.0×10¹² | - | ≥1.0×10¹² | ≥1.0×10¹² | - | ||
Dielectric strength (in 90℃ transformer oil) | MV/m | ≥12.0 | ≥12.0 | ≥10.0 | ≥12.0 | ≥12.0 | ≥10.0 | |
Medium loss factor (1MHz) | - | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | - | |
Relative dielectric coeff (1MHz) | - | ≤4.5 | ≤4.5 | ≤4.5 | ≤4.5 | ≤4.5 | - | |
Arc resistance | S | ≥180 | ≥150 | ≥180 | ≥180 | ≥180 | ≥180 | |
Proof tracking index (PTI) | V | ≥600 | ≥600 | ≥600 | ≥600 | ≥600 | ≥600 | |
Flame retardant | Grand | FV0 | FV0 | - | FV0 | FV0 | - | |
Temperature index | - | 155 | 155 | 130 | 155 | 155 | 130 | |
Appearance & Color | - | Smooth surface, no air bubble and crack, no sundries. Available color: white, orange, grey and other colors as required. | ||||||
Superior Strength-to-Weight Ratio:
SMC and BMC parts are substantially lighter than steel or aluminum components while maintaining high mechanical strength. This weight reduction directly contributes to greater energy efficiency and lower operational costs for trains.
High Mechanical Properties:
With exceptional flexural strength, impact strength, and stiffness, these materials can withstand constant vibrations, mechanical stress, and impact, ensuring long-term durability in railway environments.
Excellent Electrical Insulation:
Both materials have high dielectric strength and electrical insulation properties, making them critical for components in high-voltage areas. They prevent electrical arcing and ensure the safety of both equipment and personnel.
Dimensional Stability:
SMC and BMC parts have low shrinkage and a low coefficient of thermal expansion, which means they maintain their precise shape and size over a wide range of temperatures. This is vital for complex parts that require tight tolerances.
Flame and Smoke Resistance:
A crucial safety requirement in mass transit, these materials are formulated to be flame-retardant (often meeting FV0 ratings) and produce low smoke and toxicity when exposed to fire.
Corrosion and Chemical Resistance:
Unlike metal, SMC and BMC are highly resistant to corrosion from water, chemicals, and harsh environmental factors, which reduces maintenance and extends the lifespan of components.
Design Freedom:
The compression molding process allows for the creation of complex, multi-functional parts in a single piece, which can consolidate multiple metal components into one, simplifying assembly and reducing overall system costs.
SMC and BMC parts are used extensively throughout the interior and exterior of trains and railway infrastructure.
1. Interior Components:
Due to their flame and smoke resistance, they are ideal for train seats and seat frames, interior cladding panels, and luggage racks. Their durability also makes them suitable for flooring, ceilings, and other internal fittings.
2. Exterior Components:
The materials' weatherability, high strength, and lightweight properties make them perfect for train noses, side panels, and aerodynamic fairings.
3. Electrical Infrastructure:
Their superior electrical properties are utilized in critical trackside and on-board applications such as third rail insulators, cable brackets, cable trays, and traction motor brush holders.
4. Structural Parts:
They are also used for various structural components like switch machine insulation pads and other parts that require a combination of strength and insulation.
