P420M is a high-strength, fine-grain steel specifically designed for use in pressure vessels and boilers, manufactured under the European standard EN 10028-5.
P420M steel plate offered by GNEE is a kind of steel material for boiler and pressure vessel, P420M vessel plate is mainly used for making boilers. We can provide customised size, cutting, welding, punching and other processing services according to your demand for the product.
Chemical Composition:
| C | Si | Mn | Ni | P | S | Mo | V | N | Nb | Ti | Al | - |
| max 0.16 | max 0.5 | max 1.7 | max 0.5 | max 0.025 | max 0.01 | max 0.2 | max 0.1 | max 0.02 | max 0.05 | max 0.05 | max 0.02 | Cr+Cu+Mo < 0.6, V+Nb+Ti < 0.15 |
Mechanical Properties:
| Rm - Tensile strength (MPa) | 500-660 |
| Nominal thickness (mm): | to 16 | 16 - 40 | 40 - 63 |
| ReH - Minimum yield strength (MPa) | 420 | 400 | 390 |
| KV - Impact energy (J) transverse, | -20° 27 |
0° 40 |
+20° 60 |
| A - Min. elongation at fracture (%) | 19 |
Process Characteristics of P420M Steel
Standard-Compliant TMCP Process:
Complies with European standard EN 10028-5 and adopts the Thermo-Mechanical Controlled Process (TMCP). It integrates controlled rolling and controlled cooling technologies to refine the steel's grain structure, eliminating the need for subsequent normalizing treatment and simplifying the production process.
Strict Chemical Composition Control:
Implements strict control over chemical composition. This targeted control effectively improves the steel's weldability, enabling smooth welding operations with standard procedures and minimizing the risk of cracks during and after welding.
Targeted Auxiliary Processing for Thick Plates:
Features targeted auxiliary processing for thick plates. Preheating is required before processing to prevent cracking, and stress relief annealing can be optionally performed as needed to eliminate internal stress and ensure product dimensional stability.
Precise Thermal Process Regulation:
Relies on precise thermal process control to achieve uniform microstructure distribution. This optimizes the balance between strength and toughness, ensuring the steel meets the strict performance requirements of pressure-bearing and heavy-duty equipment.
advantages
1. High Strength-to-Weight Ratio
With a minimum yield strength of 420 MPa, P420M allows for the design of pressure vessels with thinner walls. This leads to:
Reduced Material Costs: Less steel is required for the same pressure rating.
Lower Freight Costs: Lighter components are easier and cheaper to transport and install.
2. Exceptional Weldability
Unlike standard high-strength steels that require intensive heat management, P420M features a low Carbon Equivalent (CEV).
Minimal Preheating: Reduces the energy and time required before welding.
Low Crack Risk: Significantly higher resistance to cold cracking in the Heat Affected Zone (HAZ).
3. Superior Low-Temperature Toughness
The fine-grain structure ensures the material remains ductile rather than brittle in cold climates.
Standard Grade: Impact tested at -20°C.
ML subgrades: Offer safety and reliability in extreme environments down to -50°C, making it ideal for Arctic or offshore use.
4. Improved Fabrication Efficiency
Cold Forming: Despite its strength, it retains excellent cold-forming properties, allowing for easier bending and rolling into cylindrical shapes.
Consistent Quality: The TMCP process provides more uniform mechanical properties across the entire plate compared to traditional normalizing.
5. Increased Safety Margin
Because P420M is certified under the strict EN 10028-5 standard, it provides a high degree of fracture toughness, ensuring that pressure equipment can withstand sudden stress surges without catastrophic failure.
Packing
1.Seaworthy Packaging: We use strong, durable materials such as wooden pallets or crates to ensure the steel plates are securely packed for long sea voyages, preventing damage from movement.
2.Waterproof Wrapping: P420M is covered with high-quality waterproof materials to protect it from moisture and corrosion during transport, especially in humid environments.
3.Edge and Surface Protection: We apply edge protectors and use padded coverings to safeguard the steel from scratches and dents, ensuring that the material's surface and edges remain intact.
4.Custom Labeling and Marking: All shipments are clearly labeled with handling instructions and customer-specific requirements, facilitating smooth customs clearance and proper storage upon arrival.
Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff.
What is the thermal conductivity of P420M?
The thermal conductivity of P420M is about 45 W/(m·K) at room temperature. This thermal conductivity allows the material to conduct heat effectively, avoiding excessive temperature rise in high-temperature working environments.
What is the service life of P420M components?
The service life of P420M components depends on working conditions and maintenance. In general industrial environments with proper maintenance, it can be used for 5-10 years; in harsh conditions, regular inspection and maintenance are needed to extend service life.
Can P420M be used in marine environments?
P420M can be used in marine environments only with effective anti-corrosion treatments. The marine environment is highly corrosive, so processes like anti-rust painting or stainless steel cladding are needed to prevent rust and corrosion.
What is the modulus of elasticity of P420M?
The modulus of elasticity of P420M is approximately 200 GPa, which is similar to most low-alloy steels. This modulus reflects the material's stiffness, determining its deformation degree under external force.
Can P420M be forged into complex shapes?
Yes, P420M has good forgeability. Under proper forging temperature (1100-1250°C) and process, it can be forged into various complex shapes, which is widely used in manufacturing precision mechanical components.
Can P420M be used to make construction machinery parts?
Absolutely, P420M is widely used in making construction machinery parts. Its excellent wear resistance, strength and impact resistance can withstand the harsh working environment of construction machinery like excavators and loaders.
What is the chemical composition of P420M?
P420M mainly consists of carbon (C: 0.17-0.23%), manganese (Mn: 1.00-1.50%), silicon (Si: 0.15-0.35%), and small amounts of phosphorus (P≤0.035%) and sulfur (S≤0.035%).
Is P420M recyclable?
Yes, P420M is highly recyclable. As a steel material, it can be melted and reused after recycling, which not only reduces resource waste but also lowers environmental pollution, conforming to the concept of green manufacturing.
What standards does P420M comply with?
P420M mainly complies with European standards EN 10025 and EN 10204. These standards specify its chemical composition, mechanical properties, processing requirements and inspection methods, ensuring its quality and reliability.
Can P420M be used in the manufacturing of agricultural machinery?
Yes, P420M is suitable for manufacturing agricultural machinery. It can resist the wear and impact of farmland operations, making it ideal for components like plowshares, harvester cutters and tractor axles.