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Help CenterSteel Sheet & Plate & Boiler Steel Plate，Q245R、Q345R、15CrMoR、12Cr1MoVR
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1. Product Overview
Boiler steel plate, officially named special steel plate for boilers and pressure vessels, is a high-grade special steel exclusively used for manufacturing industrial boilers, power station boilers, heat exchangers, and high-temperature & high-pressure pressure-bearing tanks. It belongs to special equipment steel supervised by national safety regulations.
Different from ordinary medium and thick steel plates, boiler plates are manufactured with higher production standards and stricter internal control. They feature high temperature resistance, high pressure resistance, thermal fatigue resistance, creep resistance, and excellent weldability.
Boilers work under severe conditions including continuous high temperature, high pressure, steam-water alternation, thermal expansion and contraction, and long-term static load. Such working environments demand extremely high steel purity, structural stability, high-temperature strength, and toughness.
Adopting fully deoxidized and refined smelting technology, boiler steel plates feature ultra-low impurities, uniform grain structure and low internal stress. They can sustain long-term cyclic high-temperature and high-pressure loads without bulging, deformation, cracking or leakage, serving as the core safety material for boiler manufacturing, thermal equipment and energy chemical industries.
2. Executive Standards & Production Specifications
National Standard: GB/T 713-2014 Steel Plates for Boilers and Pressure Vessels
All products are manufactured strictly in accordance with special equipment material specifications, with furnace-by-furnace chemical analysis, batch-by-batch mechanical testing and customized ultrasonic flaw detection. All materials fully comply with national special equipment safety standards and pass official inspection and filing.
3. Main Steel Grades & Performance Classification
3.1 General Carbon Boiler Plate
Q245RThe most widely used basic boiler steel plate with excellent toughness, high plasticity and superior weldability. It is not prone to cold brittleness. Suitable for medium & low-temperature and medium & low-pressure boiler cylinders, furnace liners, tube sheets, heat exchangers and general pressure-bearing equipment with high cost performance and stable performance.
3.2 High-Strength Low-Alloy Boiler Plate
Q345RHigh-strength dedicated boiler steel with higher yield strength, tensile strength and impact resistance than Q245R. It features stronger high-temperature resistance and pressure resistance, widely applied in medium & high-pressure industrial boilers, power station auxiliary equipment, large heat exchange tanks and high-pressure steam equipment, serving as the mainstream material for large-scale boiler projects.
3.3 High-Temperature Heat-Resistant Boiler Plate
15CrMoR, 12Cr1MoVRPearlitic heat-resistant steel with outstanding high-temperature creep resistance, high-temperature oxidation resistance and long-term durability. Suitable for high-temperature and high-pressure power station boilers, superheaters, high-temperature reactors and core thermal power pressure-bearing equipment.
4. Complete Specifications & Dimensions
Thickness Range
3mm–200mm
Thin plate: 3–16mm (Boiler inner lining, heat exchanger plates, head splicing plates)
Medium plate: 16–60mm (Boiler cylinders, tube sheets, conventional pressure parts)
Thick plate: 60–200mm (High-pressure boilers and core structures of large power station boilers)
Standard Width
1500mm, 1800mm, 2000mm, 2200mm, 2500mm, 3000mm
Standard Length
6000mm, 8000mm, 10000mm, 12000mm
Regular Full Plate Sizes
1500×6000mm, 1800×6000mm, 2000×12000mm, 2200×12000mm, etc.
Custom Processing Service
Custom fixed-length cutting, blanking, special-shaped cutting, beveling, bending, rolling and ultrasonic flaw detection customization.Non-standard thickness and width are available. All dimensional tolerances strictly comply with national special equipment standards.
5. Delivery Status & Heat Treatment
As Rolled (AR): Conventional thin plates under 20mm with uniform structure and stable performance.
TMCP Thermo-Mechanical Controlled Processing: Refines grain structure for higher strength and toughness for medium and thick plates.
Normalized (N): Mandatory normalization for plates over 40mm and high-pressure boiler plates to eliminate rolling stress, unify metallographic structure and prevent deformation & cracking under high-temperature operation.
Normalized + Tempered: Applied for heat-resistant alloy plates and ultra-thick high-pressure plates to improve high-temperature lasting strength and creep resistance.
All boiler plates are strictly prohibited from mixed rolling or secondary rolling, ensuring traceable and qualified mechanical properties.
6. Production Process & Quality Control
Manufactured by electric furnace smelting + LF refining + vacuum degassing technology to strictly control sulfur, phosphorus and other harmful impurities. The steel features high purity without porosity, inclusion or delamination.
Precision temperature-controlled rolling and graded cooling refine grain structure, achieving perfect balance of high strength, high toughness, high plasticity and excellent weldability, effectively avoiding thermal fatigue failure and creep deformation under long-term high-temperature service.
Full-process quality inspection includes batch tensile testing, impact testing, hardness testing and ultrasonic flaw detection, ensuring far more stable performance consistency than ordinary steel plates.
7. Core Product Advantages
7.1 Excellent High-Temperature Resistance
Low strength attenuation under continuous high temperature. Superior thermal creep resistance and thermal fatigue resistance, no softening, deformation or bulging during long-term high-temperature operation.
7.2 Strong High-Pressure Bearing Capacity
High yield strength and stable structural rigidity, capable of enduring long-term static pressure and instantaneous impact pressure with high safety factor.
7.3 Outstanding Weldability
Low carbon equivalent and low impurity content ensure excellent welding performance. Suitable for large-area welding, head welding and multi-layer welding of boiler structures with smooth fusion, no cracks or pores, and stable post-weld pressure-bearing performance.
7.4 Good Low-Temperature Toughness
Resists cold brittleness under low-temperature conditions, ensuring structural stability during equipment startup & shutdown and temperature alternation in winter.
7.5 High Internal Purity & Zero Defects
Dense and uniform internal structure without delamination, cracks or internal defects, completely eliminating risks of plate bursting and leakage during boiler operation.
7.6 Superior Forming Performance
Perfect for head spinning, rolling, bending, drilling and beveling processing. Low residual stress and small rebound, ensuring high precision and neat appearance of finished boiler equipment.
8. Application Scope
Industrial steam boilers, hot water boilers, coal-fired/gas-fired/biomass boiler cylinders, furnace shells, tube sheets and headsPower station boilers, thermal power plant high-temperature & high-pressure pressure-bearing equipment, superheaters, economizers and heat exchange cavitiesChemical high-temperature reactors, steam storage tanks, high-pressure gas tanks and thermal pipeline pressure partsHVAC heat exchange equipment, pressure vessels, thermal energy engineering and environmental protection desulfurization & denitrification pressure equipmentSpecial equipment manufacturing, boiler renovation, pressure vessel maintenance and thermal energy project construction
9. Surface Quality Standard
Delivered in original hot-rolled black surface state with flat plate shape and no wave deformation or warping.Free of surface cracks, bubbles, overlaps, inclusions and heavy rust.Neat plate edges, precise dimensional tolerance and no burrs.Uniform metallographic structure and stable mechanical properties, ready for direct welding, rolling, flaw detection, pressure testing and anti-corrosion construction.
10. Delivery Cycle
Regular in-stock specifications (Q245R / Q345R conventional medium & thin plates): 1–3 working days
Thick plates, normalized plates, flaw detection customized plates & special-shaped processing orders: 3–7 working days
Heat-resistant alloy plates, extra-thick plates & large-scale boiler engineering orders: 7–15 working days
Priority production and urgent delivery are supported with full production and logistics tracking to guarantee project schedules.
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