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Help CenterSteel Sheet & Plate & Boiler Steel Plate，Q245R、Q355R、15CrMoR、P265GH、16Mo3
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1. Product Overview
Boiler Steel Plate is special heat-resistant pressure-bearing steel plate for boilers and pressure equipment. It is produced from high-purity continuously cast slabs via vacuum refining, controlled hot rolling and heat treatment. Designed for long-term service under high temperature, high pressure and alternating water vapor corrosion, it strictly controls sulfur and phosphorus impurities, featuring stable high-temperature creep resistance, excellent impact toughness at high & low temperature and outstanding weldability. Complying with mandatory safety standards for special equipment, it serves as core pressure-bearing material for power station boilers, industrial boilers, heat exchangers, steam drums and headers.
Production Process: Refined Continuous Cast Slab → Controlled Hot Rolling / TMCP Rolling → Normalizing / Tempering / Quenching & Tempering → 100% Ultrasonic Non-destructive Testing → Shot Blasting & Anti-rust Primer Coating → Edge Cutting & Fixed Length → Marking, Bundling & Shipment
2. Executive Standards & Main Grade Comparison
2.1 General Applicable Standards
GB Standard: GB/T 713-2014 Steel Plates for Boilers and Pressure Vessels, GB 150 Pressure Vessel Code
ASME Standard: SA516 Gr60/Gr70, SA387 Gr11/Gr22 (Heat-resistant Cr-Mo Alloy)
EN Standard: EN 10028 (P265GH, P355GH, 16Mo3)
JIS Standard: SPV Series Boiler Special Steel Plate
2.2 Domestic Main Grades, Service Temperature & Applications
| Grade | Material Type | Max Continuous Service Temp | Core Application Parts |
|---|---|---|---|
| Q245R | Carbon Boiler Plate (Replaced old grade 20G) | ≤450℃ | Civil heating boilers, small industrial steam boilers, atmospheric steam drums, economizer shells |
| Q345R | Low Alloy High Strength General Boiler Plate | ≤475℃ | Medium & small power station boilers, industrial boiler shells, heat exchangers, reactors, general high-temperature pressure parts |
| Q370R | High Strength Medium Temp Boiler Plate | ≤475℃ | Large-capacity power station steam drums, thick-wall high-pressure boiler barrels, heavy-duty pressure shells |
| 13MnNiMoR | Extra-thick High-pressure Boiler Plate | ≤475℃ | Large thermal power steam drums, extra-thick wall headers, waste heat boiler shells |
| 15CrMoR | Cr-Mo Heat-resistant Alloy Plate | ≤520℃ | High-temperature superheaters, high-temperature headers, refinery furnace pressure parts |
| 12Cr1MoVR | High Cr-Mo Heat-resistant Boiler Plate | ≤570℃ | Main heating surfaces of subcritical & supercritical power station boilers, high-temp high-pressure pipe shells |
2.3 Equivalent International Grades
Carbon-Manganese Boiler Plate: P265GH, SA516 Gr60 (Equivalent to Q245R)
Low Alloy High Strength Boiler Plate: P355GH, SA516 Gr70 (Equivalent to Q345R)
Heat-resistant Cr-Mo Plate: 16Mo3, SA387 Gr11/Gr22 (Equivalent to 15CrMoR / 12Cr1MoVR)
3. Supply Specifications & Dimensional Parameters
3.1 Size Range
Thickness: 6mm～200mm; Regular stock 8–100mm, customized power station extra-thick plate 100–200mm available
Width: 1500mm–3000mm, max rolling width up to 4800mm
Fixed Length: 3000–12000mm, CNC irregular cutting & non-standard sizes customizable
Single Plate Weight: 0.6–32 tons, bulk delivery by full truck or 40HC container
Edge Type: Slit Edge (burr-free, standard for export boiler equipment), Mill Edge
Optional Z-Performance: Z15/Z25/Z35 anti-lamellar tearing steel optional for key welding parts over 40mm thick
3.2 Dimensional & Inspection Precision
Thickness tolerance meets Grade 1 precision for special equipment; flatness and camber are strictly controlled. 100% factory UT ultrasonic testing (Grade Ⅰ / Grade Ⅱ optional), free of internal lamination, slag inclusion, cracks and pores.
4. Core Chemical Composition (Strict Impurity Control)
Uniform limit for all boiler plates: S≤0.025%, P≤0.025% to drastically reduce high-temperature welding crack and low-temperature brittle fracture risk.
Carbon-Manganese Series (Q245R/Q345R): Low carbon & manganese design for full-position weldability;
13MnNiMoR: Nickel alloyed to improve low-temperature impact toughness for thick plates;
Cr-Mo Series (15CrMoR/12Cr1MoVR): Chromium & Molybdenum added to strengthen high-temperature creep resistance, oxidation resistance and stress rupture strength.
5. Standard Mechanical Properties (As-delivered, Room Temp Test)
| Grade | Yield Strength ReL(MPa) | Tensile Strength Rm(MPa) | Elongation A ≥% | V-Notch Impact KV2(J) (Ambient Temp) |
|---|---|---|---|---|
| Q245R | ≥245 | 400–520 | 21 | ≥34 |
| Q345R | ≥345 | 510–640 | 21 | ≥34 |
| Q370R | ≥370 | 530–670 | 20 | ≥34 |
| 13MnNiMoR | ≥390 | 570–740 | 18 | ≥34 |
| 15CrMoR | ≥295 | 440–640 | 21 | ≥34 |
| 12Cr1MoVR | ≥245 | 440–640 | 21 | ≥34 |
Delivery Condition: Hot rolled, controlled rolling, normalizing, normalizing+tempering, quenching & tempering. Heat treatment delivery is mandatory for Cr-Mo heat-resistant alloy plates and extra-thick plates to stabilize high-temperature toughness and stress rupture strength.
6. Optional Surface Treatments
Hot Rolled Black Finish: Economical basic type for internal non-exposed boiler structural parts;
Shot Blasting + Shop Anti-rust Primer: Main export standard, removes oxide scale, short-term anti-rust for sea transit, compatible with boiler factory painting procedures;
Reinforced High-temp Anti-rust Primer: For long-term outdoor storage and long-distance ocean shipping, extended anti-corrosion service life.
7. Core Product Advantages
Reliable High-temperature Pressure Resistance: Special material for special equipment, certified by boiler inspection institute, no bulging, deformation or creep failure under long-term high temperature & pressure;
Balanced High & Low Temperature Toughness: Full range grades for ambient & medium-high temperature service, resisting brittle fracture under temperature alternating start-stop conditions;
Excellent Weldability: Low carbon equivalent, compatible with SAW, TIG, MMA welding, mature preheating & stress relief welding procedure for thick plates;
Ultra-high Internal Purity: Vacuum refining + 100% full-plate ultrasonic inspection, zero internal defects, greatly extended boiler service life;
Wide Machining Compatibility: Supports roll forming, bending, flame & plasma cutting, perfectly suited for boiler shell & head spinning forming;
High-temperature Steam & Flue Gas Corrosion Resistance: Cr-Mo heat-resistant grades resist erosion of high-temperature steam, acid & alkali flue gas, ideal for thermal power and chemical high-temperature working conditions.
8. Main Application Fields
8.1 Thermal Power Generation (Core Application)
Power station boiler steam drums, water wall headers, superheater headers, economizer shells, waste heat boiler barrels, large heat exchanger tube sheets, steam buffer pressure vessels.
8.2 Industrial Heating Boilers
Coal/gas/biomass steam boiler shells, steam separators, heat exchanger shells, heating pressure water tanks, thermal oil furnace barrels.
8.3 Petrochemical High-temperature Equipment
Chemical high-temperature reactors, thermal oil heat exchangers, high-pressure hydrogenation barrels, high-temperature separation towers for oil & gas.
8.4 New Energy Supporting Equipment
Waste incineration waste heat boilers, photothermal heat exchange equipment, high-temperature pressure components for biomass power generation.
8.5 General High-temperature Special Equipment
High-temperature air buffer tanks, boiler heads, pipeline expansion joints, cooling pressure equipment for metallurgy.
9. Packaging, Marking & Delivery Terms
Seaworthy Export Packaging: Steel plates separated by wooden skids, tightly bundled with steel strips, edge iron protectors equipped. Anti-rust shop primer coated on surface, fully waterproof to avoid scratch and rust during long ocean transit.
Plate Marking: Double-sided spray marking on each plate, indicating grade, thickness & width, heat number, UT testing grade, heat treatment status, Z-direction performance and executive standard. Original complete Mill Test Certificate (MTC) attached per batch.
Lead Time: 8–10 days for regular stock; 12–20 days for customized Cr-Mo heat-resistant plate, extra-thick plate over 100mm, Grade Ⅰ UT inspection and Z-performance steel.
Logistics & Shipment: Loading at Tianjin Port, full truck or 40HC container export, FOB Tianjin / CFR / CIF trade terms acceptable.
10. Storage, Machining & Operation Precautions
Warehouse must be dry and ventilated; avoid long-term outdoor rain exposure, surface rust will directly reduce UT pass rate and low-temperature impact performance;
Stack horizontally separated by wooden skids, isolate plates to prevent scratch of anti-rust primer from direct friction;
Calculate minimum bending radius before boiler shell roll forming & head spinning; avoid excessive cold extrusion cracking for high-strength and heat-resistant grades;
Preheating before welding and post-weld stress relief heat treatment are mandatory for Cr-Mo heat-resistant steel and plates over 40mm thick to prevent lamellar tearing and welding cracks;
Re-shot blasting & supplementary anti-rust primer coating, plus impact & tensile performance retest for inventory stored over 6 months;
Hydrostatic and air tightness pressure test is mandatory before equipment delivery, matching the design pressure & temperature parameters of boiler plate.
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