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Help CenterSteel Sheet & Plate & Boiler Steel Plate，ASTM A515 Gr60/70、ASTM A516 Gr60/70、EN10028、DIN17175、ASME SA387
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1. Product Overview
Boiler steel plate is special pressure-bearing steel plate dedicated for boilers, suffix "R" stands for boiler pressure service. As special medium & heavy plate for special equipment, it is produced by clean steel smelting with low sulfur & phosphorus, controlled rolling and heat treatment process. Specially designed for long-term high temperature and alternating steam pressure working conditions of boilers, it features stable high-temperature strength, impact toughness under hot-cold alternation, excellent weldability and fatigue resistance.Different from general pressure vessel plate, boiler plate is enhanced on high-temperature stress rupture strength, steam oxidation resistance and thermal fatigue performance. Divided into three series: medium-low temperature carbon boiler plate, high temperature Cr-Mo heat resistant boiler plate and low-temperature boiler plate. It acts as core raw material for power station boilers, industrial steam boilers, waste heat boiler drums, water wall headers and heat exchanger tube sheets, complying with domestic special equipment inspection standards and overseas boiler equipment export specifications.
2. Applicable Standards
Domestic Chinese Standards
GB/T 713.1~713.4-2023 Steel Plates and Strips for Pressure Equipment (Core Standard for Boiler Plate)
GB/T 3087 Supporting Plate Specification for Low & Medium Pressure Seamless Boiler Tubes
GB 150 Design & Acceptance Standard for Steel Pressure Vessels / Boiler Pressure Equipment
GB/T 20801 General Code for Pressure Piping
International Export Standards
ASTM A515 Gr60/70, ASTM A516 Gr60/70, EN10028, DIN17175, ASME SA387
Supporting Certifications
Special equipment Mill Test Certificate (MTC), SGS high-temperature mechanical & impact test report, CE boiler pressure equipment certification, 100% UT ultrasonic NDT report
3. Main Material Grades (Stainless Steel Excluded)
3.1 Medium-Low Temperature Carbon Boiler Plate (Industrial Atmospheric & Medium Pressure Steam Boiler)
Q245R, old grade 20g, max long-term service temperature ≤475℃, cost-effective, widely used for civil boilers and waste heat drums
3.2 HSLA High Strength Boiler Plate (Power Station Boiler, High Pressure Drum, Heat Exchanger)
Q345R, Q370R, Q420R, most widely used grade for domestic power stations, excellent 0℃ impact toughness and anti-steam fatigue performance
3.3 High Temperature Cr-Mo Heat Resistant Boiler Plate (High Temperature Superheater, Hydrogenation Waste Heat Boiler)
15CrMoR, 14Cr1MoR, 12Cr2Mo1R, stable creep & oxidation resistance under long-term 550℃ service, avoid high temperature deformation
3.4 Extra-Thick High Pressure Power Station Boiler Plate (Large Drum for 1000MW Generating Units)
13MnNiMoR, 18MnMoNbR, uniform mechanical performance across full plate thickness, dedicated for ultra-high pressure boiler cylinders
3.5 Special Low-Temperature Boiler Plate (Low-Temperature Waste Heat, Gas-Fired Low Temp Boiler)
16MnDR, 09MnNiDR, high impact energy at -40℃ to prevent brittle fracture caused by temperature difference during startup & shutdown
4. Delivery Heat Treatment Status
TMCP Thermo-Mechanical Controlled Rolling & Cooling: Standard delivery for 6–50mm Q245R/Q345R, refined grain structure with superior weldability
N Normalized: Mandatory for heavy plate & low-temperature boiler plate, greatly improved low-temperature impact toughness
N+T Normalized & Tempered: For Cr-Mo heat resistant plate & plate over 80mm thickness, eliminate rolling stress and stabilize high-temperature stress rupture strength
Q+T Quenched & Tempered: For ultra-high pressure special boiler components, balanced ultra-high strength and toughness
5. Complete Production Process
Molten steel refining for desulfurization, dephosphorization & vacuum degassing → Continuous casting slab high temperature homogenization heating → Four-high reversible mill controlled temperature rolling → ACC accelerated controlled cooling → Normalizing / tempering / quenching & tempering in heat treatment furnace → Shot blasting to fully remove surface mill scale → 100% full-plate UT ultrasonic NDT → Sampling high-temperature tensile, V-notch impact & cold bending physical & chemical test → Steel stamping with boiler special mark & heat batch number → CNC edge trimming & fixed length cutting → Temporary anti-rust oil coating → Steel-wood composite pallet bundling & warehousing
6. Core Technical Parameters
6.1 Size Range
Thickness: 6mm ~ 260mm, customized thin water wall plate & extra-thick high pressure boiler drum plate available
Width: 1500mm ~ 4200mm, mainstream wide width 1800/2000/2200/2500mm full plate to reduce welding seams
Single plate length: 6000mm ~ 12000mm, support customized fixed length & deep processing bevel cutting
6.2 Reference Key Mechanical & High Temperature Performance
Q245R: Yield ≥245MPa, Tensile 370–500MPa, Elongation ≥22%, impact energy ≥34J at 0℃, max service temperature ≤475℃
Q345R: Yield ≥345MPa, Tensile 470–640MPa, Elongation ≥21%, impact energy ≥34J at 0℃, suitable for steam below 450℃
15CrMoR Heat Resistant Plate: Stable stress rupture strength at 550℃, anti-creep, ideal for high temperature superheater cylinders
16MnDR Low Temperature Plate: Impact energy ≥47J at -40℃, no brittle fracture under frequent boiler startup & shutdown temperature alternation
6.3 NDT & Surface Requirements
100% UT ultrasonic inspection for every single plate, Grade Ⅱ qualified per GB/T2970, free of lamination, internal slag inclusion and microcracks
Surface free of scar, heavy skin, bubble and deep scratches; clean surface without mill scale after shot blasting, no pore or crack during welding forming
6.4 Welding Process Performance
Strictly controlled carbon equivalent, intact after 180° cold bending without cracking; compatible with SAW, GTAW and SMAW, no complex preheating required for boiler head hot pressing and cylinder assembly welding
7. Core Product Advantages
Special clean steel for boiler special equipment, safe & compliant under high temperatureStrictly limited harmful impurities S & P, fully qualified high-temperature tensile and thermal fatigue tests, complete special equipment material documents for one-time inspection approval of domestic boiler manufacturers.
Resist steam oxidation under high temperature, adapt alternating thermal load of boilersOptimized high-temperature metallographic structure avoids oxidation scaling under long-term steam washing; no cracking or deformation under repeated cold-hot cycles of boiler startup & shutdown.
Complete grade system covering all types of boilersMatching materials available for civil low-pressure boilers, industrial medium-pressure steam furnaces, large ultra-high pressure power station boilers and low-temperature waste heat boilers.
Uniform mechanical performance for heavy plates, stable long-term service of high-pressure drumsControlled rolling & heat treatment refine grain structure with consistent mechanical performance from surface to core of heavy plate, high safety factor for large drums of 1000MW power units.
Excellent bending & weldability to reduce scrap rate of boiler manufacturersSuitable for hot pressing heads and full-plate cylinder rolling; mechanical performance of welding joint close to base metal to greatly cut welding defects and rework loss.
Complete export test documents for smooth customs clearance of overseas boiler equipmentSupply full SGS high-temperature physical & chemical reports, CE pressure vessel certificate and original NDT records, fit boiler equipment export to Southeast Asia, Middle East and Europe.
Sufficient spot stock & one-stop deep processing serviceRegular stock of 6–100mm mainstream thickness, support CNC flame/plasma cutting, bevel machining and shot blasting pretreatment.
8. Main Application Fields
8.1 Thermal Power Station Boilers (Core High Temperature Application)
Drum of subcritical / supercritical boilers, water wall header, tube sheet of superheater & reheater, steam buffer storage tank, waste heat recovery cylinder
8.2 Industrial Steam Boiler Equipment
Factory steam boiler, biomass boiler, waste incineration waste heat boiler, heat conduction oil furnace cylinder, steam separation drum
8.3 Chemical Refining Waste Heat Devices
Waste heat boiler of hydrogenation unit, high temperature heat exchange drum for synthetic ammonia, tube sheet of cracking waste heat heat exchanger
8.4 Gas & Low-Temperature Special Boilers
Low-temperature waste heat boiler matched with LNG, gas-fired steam boiler, alternating cold-hot cycle heat exchange equipment
8.5 Municipal Central Heating Equipment
Central heating thermal boiler, thermal buffer pressure tank, high temperature heat exchange separation cylinder
8.6 Light Industry & Food Steam Equipment
High-pressure steam boiler for food cooking, sterilization pressure drum for pharmaceutical industry, high temperature heat exchange vessel for wine fermentation
9. Packaging, Shipment & Lead Time
Packaging Methods
Regular medium & thin plates: Stacked on steel-wood pallets, cross & vertical steel strapping, iron corner guards at four corners to prevent collision damage
Extra-thick boiler plate over 80mm: Single plate fixed on IPPC fumigated solid wooden pallets, temporary anti-rust oil coated on surface
Export dedicated packaging: Whole pallet wrapped with thickened waterproof anti-rust plastic film, fit for 40HC high cube container sea transportation
2. Delivery Warehouse: Spot goods shipped directly from Tianjin Port
3. Lead Time: 5–7 days for regular Q245R/Q345R stock goods; 12–20 days for customized orders of 15CrMoR heat resistant plate, 16MnDR low-temperature plate and extra-thick plate over 100mm
4. Payment Term: 30% TT advance deposit, balance settled before shipment, L/C letter of credit is not accepted.
10. Mandatory Full Factory Inspection Items
Spectral chemical composition analysis of raw slab, strictly control harmful impurities S & P
100% UT ultrasonic NDT on every single plate to detect internal lamination & microcracks
Sampling mechanical test including normal temperature tensile, 0/-20/-40℃ V-notch impact, cold bending and hardness per batch
High-temperature stress rupture tensile test (mandatory for Cr-Mo heat resistant boiler plate)
Full dimension inspection of thickness, width, length and plate flatness
Metallographic structure & decarburization depth analysis (compulsory inspection for high-temperature dedicated boiler plate)
Original special equipment Mill Test Certificate, factory certificate and third-party SGS authoritative test report provided
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