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Help CenterSteel Sheet & Plate & Pressure Vessel Plate，Q345R、16MnDR、09MnNiDR、15CrMoR、P265GH、P355GH、SA516Gr60、SA516Gr70
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1. Product Overview
Pressure Vessel Steel Plate is full name Steel Plate for Pressure Equipment, a special steel plate exclusively used for manufacturing pressure vessels, storage tanks, boiler drums, heat exchangers, towers and other pressure-bearing special equipment. It adopts vacuum degassing smelting with strict control of harmful impurities sulfur and phosphorus. It integrates high strength, high & low temperature toughness, excellent weldability and fatigue resistance, complying with mandatory safety standards for special pressure equipment.
Production Process: Refined Steel Slab → Hot Rolling / Controlled Rolling → Heat Treatment (Normalizing / Tempering / Quenching & Tempering) → Ultrasonic Testing → Finishing & Cutting → Marking, Film Coating & Packing
2. Executive Standards & Domestic & International Grade Comparison
2.1 General Applicable Standards
Chinese GB Standard: GB/T 713 (Steel Plate for Pressure Equipment), GB 150 Pressure Vessel Code
American ASME Standard: SA516, SA285, SA387, SA203
European EN Standard: EN 10028 (P Series)
Japanese JIS Standard: SPV Series
2.2 Common Domestic Grades & Working Conditions
| Grade | Material Type | Service Temperature Range | Core Applications |
|---|---|---|---|
| Q245R | Carbon Steel for Normal Temp Vessel | 0～475℃ | Atmospheric storage tanks, ordinary hot water boilers, low-pressure buffer tanks |
| Q345R | Low Alloy Medium Temp Plate | -20～475℃ | Chemical storage tanks, heat exchangers, reactors, general pressure vessels |
| Q370R | High Strength Medium Temp Plate | -20～475℃ | Large-volume high-pressure storage tanks, heavy-duty pressure shells |
| 16MnDR | Low Temperature Vessel Plate | -40℃ Low Temp Condition | Liquid ammonia tanks, low-temperature separation equipment |
| 09MnNiDR | Ultra-Low Temperature Plate | -70℃ | Auxiliary LNG tanks, CO₂ cryogenic storage vessels |
| 15CrMoR / 14Cr1MoR | Heat-Resistant Cr-Mo Alloy Plate | Up to 550℃ High Temp | Hydrogenation reactors, high-temperature boilers, refinery furnaces |
| 07MnNiMoVDR | Quenched & Tempered High Strength Low Temp Plate | -40℃ High Pressure | Spherical tanks, high-pressure gas storage tanks |
2.3 Equivalent International Mainstream Grades
ASME: SA516 Gr60/Gr70 (Equivalent to Q345R), SA387 Gr11/Gr22 (Heat-resistant Cr-Mo), SA203 (Low-temperature Nickel Steel)
EN: P265GH, P355GH, 16Mo3
JIS: SPV355, SPV490
3. Supply Specifications & Dimensional Parameters
3.1 Size Range
Thickness: 6mm～200mm; Regular stock 8–120mm, customized extra-thick plate 120–200mm
Width: 1500mm–2500mm; Standard widths: 1800/2000/2200/2400mm
Fixed Length: 6000mm/9000mm/12000mm, custom irregular cutting per drawing available
Single Plate Weight: 0.5–25 tons; Bulk delivery by full truck or container
Surface Treatment: Hot rolled black finish, shot blasting rust removal, anti-rust paint coating optional
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) to eliminate internal lamination, slag inclusion and pores.
4. Core Chemical Composition (Strict Impurity Control)
Sulfur S ≤0.025%, Phosphorus P ≤0.030% for all vessel plates to reduce hot cracking and low-temperature brittle fracture risk.
Carbon-Manganese Series (Q245R/Q345R): Low carbon & manganese for superior weldability
Low Temperature DR Series: Nickel alloyed to drastically improve low-temperature impact toughness
Heat-resistant Cr-Mo Series (CrMoR): Chromium & Molybdenum added for high-temperature creep resistance and oxidation resistance
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) |
|---|---|---|---|---|
| Q245R | ≥245 | 400–520 | 21 | ≥34 (Ambient Temp) |
| Q345R | ≥345 | 510–640 | 21 | ≥34 (0℃) |
| 16MnDR | ≥315 | 490–630 | 21 | ≥34 (-40℃) |
| 09MnNiDR | ≥270 | 430–570 | 23 | ≥34 (-70℃) |
| 15CrMoR | ≥295 | 440–640 | 21 | ≥34 (Ambient Temp) |
Delivery condition: Hot rolled, controlled rolling, normalizing, normalizing+tempering, quenching+tempering (customizable). Low-temperature & heat-resistant alloy plates must be heat-treated to stabilize toughness.
6. Core Product Advantages
Compliant Safety Pressure Bearing Performance: Meet national mandatory standards for special equipment, certified by boiler inspection institute, no risk of tank rupture under pressure;
Balanced High & Low Temperature Toughness: Full range grades for ambient, low and ultra-high temperature service, resisting brittle fracture under extreme temperature;
Excellent Weldability: Low carbon equivalent, compatible with SAW, TIG, MMA welding, mature welding procedure for thick plates;
High Internal Purity: Vacuum refining + full-plate UT inspection, zero internal defects, long service life;
Strong Processing Compatibility: Roll forming, bending, cutting, heat treatment and re-inspection available, suitable for all vessel forming processes;
High Temperature Creep Resistance: Cr-Mo heat-resistant grades resist deformation and oxidation under long-term high-temperature pressure.
7. Main Application Fields
7.1 Petrochemical Industry (Largest Application)
Crude oil storage tanks, LPG spherical tanks, hydrogenation reactors, distillation towers, heat exchangers, coolers, reactors; cryogenic storage tanks for LNG, liquid oxygen, liquid ammonia.
7.2 Power & Boiler Industry
Power station boiler drums, headers, waste heat boiler shells, high-pressure tube sheets, steam buffer vessels.
7.3 Coal Chemical & New Energy
Coal-to-gas equipment, CO₂ capture storage tanks, high-pressure hydrogen storage vessels, energy storage pressure containers.
7.4 General Special Equipment
Air buffer tanks, vessel heads, mixing reactors, pipeline expansion joints, desalination pressure equipment.
7.5 Offshore Engineering
Buffer storage tanks on offshore platforms, pressure-bearing shells for subsea medium delivery, offshore chemical equipment housings.
8. Packaging, Marking & Delivery Terms
Packaging: Thin plates covered with anti-rain PE film; medium & thick plates supported by wooden skids at bottom. Export plates shot-blasted + anti-rust painted, bundled with steel strips, edge iron protectors for ocean moisture-proof.
Plate Marking: Double marking via spray code + paper label on each plate, indicating grade, heat number, thickness & width, UT testing grade, heat treatment status, standard, impact test temperature.
Lead Time: 8–10 days for regular stock; 12–20 days for customized low-temp / heat-resistant extra-thick plates & Grade Ⅰ UT inspection.
Logistics & Shipment: Loading at Tianjin Port, full truck or 40HC container export, FOB / CFR / CIF trade terms acceptable.
9. Storage, Machining & Operation Precautions
Warehouse must be dry & ventilated; avoid outdoor rain exposure which causes rust and downgrades UT inspection pass rate;
Stack thick plates separated by wooden skids to prevent surface scratch and warpage;
Calculate minimum bending radius before roll forming / bending to avoid cold tearing;
Strictly follow preheating & post-weld stress relief heat treatment for alloy heat-resistant / low-temperature steel welding;
Hydrostatic air tightness test is mandatory for finished vessels to match design pressure parameters of steel plates;
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