A387 Gr5 hot-rolled plate is a type of alloy steel plate for pressure vessels specified in American standards. It complies with the ASTM A387/A387M standards and is widely used in high-temperature and high-pressure industrial scenarios.
ASTM A387 Grade 5 Pressure Vessel And Boiler Steel Plate Chemical Composition and Mechanical Property
| Grade | Chemical Composition(%) | ||||
| C | Mn | Si | P max | S max | |
| A387 Grade 5 Class1 (A387GR5CL1) | 0.15max | 0.25-0.66 | 0.55max | 0.035 | 0.03 |
| Grade | Mechanical Property | ||||
| Tensile Strength(MPa) | Yield Strength(MPa) min | % Elongation in 2 in.(50mm) min | Impacting Test Temperature(°C) | ||
| A387 Grade 5 Class1 (A387GR5CL1) | 415-585 | 205 | 45 | -20,40,-60 | |
| Grade | Chemical Composition(%) | ||||
| C | Mn | Si | P max | S max | |
| A387 Grade 5 Class2 (A387GR5CL2) | 0.15max | 0.25-0.66 | 0.55max | 0.035 | 0.03 |
| Grade | Mechanical Property | ||||
| Tensile Strength(MPa) | Yield Strength(MPa) min | % Elongation in 2 in.(50mm) min | Impacting Test Temperature(°C) | ||
| A387 Grade 5 Class2 (A387GR5CL2) | 515-690 | 310 | 45 | -20,40,-60 | |
Performance Characteristics of A387Gr5 alloy steel plate
High-Temperature Performance
- Long-term operating temperature ≤ 600°C, with yield strength ＞ 245 MPa at 500°C.
- In medium-temperature (350-480°C) hydrogen service environments, it exhibits resistance to hydrogen embrittlement, hydrogen corrosion, and sulfide corrosion, along with low temper brittleness.
Mechanical Properties
- Tensile strength: 515-690 MPa
- Yield strength: ≥ 310 MPa
- Elongation: ≥ 18%
- Reduction of area: ≥ 40%It combines high strength with good ductility.
Processing and Welding
- Easy to weld with high weld quality; can be formed through processes such as rolling and forging.
- Heat treatment is typically normalizing + tempering or annealing to ensure stable performance.
Corrosion Resistance
- It has excellent resistance to corrosive media such as hydrogen sulfide (H₂S) and carbon dioxide (CO₂), making it suitable for harsh corrosive environments.
Application Fields of A387Gr5 hot-rolled plate
Petrochemical Industry
High-temperature and high-pressure equipment including ammonia synthesis reactors, coal gasifiers, shift converters, hydroprocessing reactors, heat exchangers, and distillation columns.
Power Industry
Boiler superheaters, reheaters, steam pipelines, nuclear power plant pressure vessels, and auxiliary equipment.
Marine and Energy Sectors
Hull structures, decks, cabins, gas turbine components, and nuclear power equipment.
Others
Scenarios requiring high-temperature and corrosion resistance, such as pharmaceutical/food processing containers and chemical storage tanks.
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| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Clad steel plate | P265GH+410,S355JR+410,A516Gr70+316, A537CL1+304L,Q235B+304L,Q345B+304, A516Gr70(NACE)+410,A537CL1+904L, A537CL1+316L,A516Gr70+304L,A537CL1+304 ,A516Gr70+410,A516Gr70+904L |
2-300mm(Based plate),1-50mm(Composited plate) | / | UT, AR, TMCP.Normalized, Quenched and Tempered,Z Direction Test, Charpy V-Notch impact TestThe Third Party Test , Coated or Shot Blasting and Painting. |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
