Product Showcase
ASTM A387 Carbon Steel Plates
ASTM A387 / A387M is Cr-Mo pressure-vessel plate for elevated-temperature boilers and welded vessels. Also searched as A387, A387M, A387 Cr-Mo, A387 chrome moly, SA387, SA-387. Code work uses SA-387. SHH STEEL supplies A387 / SA387 mill-direct from China origin.
Grades: 2, 12, 11, 22, 21, 5, 9, 91. Class 1 and Class 2 are different strength levels of the same chemistry. Grade 91 is Class 2 only. Older books add 21L / 22L (Class 1 only). Grade 911 moved to A1017.
- Grade 2: A387 Gr.2, A387GR2, A387-2; Cl.1 = A387GR2CL1; Cl.2 = A387GR2CL2
- Grade 12: A387 Gr.12, A387GR12; Cl.1 = A387GR12CL1; Cl.2 = A387GR12CL2
- Grade 11: A387 Gr.11, A387GR11; Cl.1 = A387GR11CL1; Cl.2 = A387GR11CL2
- Grade 22: A387 Gr.22, A387GR22; Cl.1 = A387GR22CL1; Cl.2 = A387GR22CL2
- Grade 21: A387 Gr.21, A387GR21; Cl.1 = A387GR21CL1; Cl.2 = A387GR21CL2
- Grade 5: A387 Gr.5, A387GR5; Cl.1 = A387GR5CL1; Cl.2 = A387GR5CL2
- Grade 9: A387 Gr.9, A387GR9; Cl.1 = A387GR9CL1; Cl.2 = A387GR9CL2
- Grade 91: A387 Gr.91, A387GR91, P91; only Cl.2 = A387GR91CL2
- 22L / 21L: A387GR22L, A387GR21L (Class 1 only)
Do not swap Class 1 and Class 2. Do not treat A387 as SA204, SA202 or SA515. Related: ASME SA387, pressure vessel steel plates.
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ASTM A387 Grade 11 Class 2 Steel Plate | A387 Gr.11 Cl.2 1.25Cr-0.5Mo Vessel Plate
ASTM A387 Grade 11 Class 2 / A387 Gr.11 Cl.2 is 1.25Cr-0.5Mo pressure-vessel plate. Tensile is 515–690 MPa and yield is 310 MPa min. SHH STEEL supplies A387GR11CL2 worldwide as a global steel mill sourcing partner.View More -
ASTM A387 Grade 11 Class 1 Steel Plate | A387 Gr.11 Cl.1 1.25Cr-0.5Mo Vessel Plate
ASTM A387 Grade 11 Class 1 / A387 Gr.11 Cl.1 is 1.25Cr-0.5Mo pressure-vessel plate. Tensile is 415–585 MPa and yield is 240 MPa min. SHH STEEL supplies A387GR11CL1 worldwide as a global steel mill sourcing partner.View More -
ASTM A387 Grade 12 Class 2 Steel Plate | A387 Gr.12 Cl.2 1Cr-0.5Mo Vessel Plate
ASTM A387 Grade 12 Class 2 / A387 Gr.12 Cl.2 is 1Cr-0.5Mo pressure-vessel plate. Tensile is 450–585 MPa and yield is 275 MPa min. SHH STEEL supplies A387GR12CL2 worldwide as a global steel mill sourcing partner.View More -
ASTM A387 Grade 12 Class 1 Steel Plate | A387 Gr.12 Cl.1 1Cr-0.5Mo Vessel Plate
ASTM A387 Grade 12 Class 1 / A387 Gr.12 Cl.1 is 1Cr-0.5Mo pressure-vessel plate. Tensile is 380–550 MPa and yield is 230 MPa min. SHH STEEL supplies A387GR12CL1 worldwide as a global steel mill sourcing partner.View More -
ASTM A387 Grade 2 Class 2 Steel Plate | A387 Gr.2 Cl.2 0.5Cr-0.5Mo Vessel Plate
ASTM A387 Grade 2 Class 2 / A387 Gr.2 Cl.2 is 0.5Cr-0.5Mo pressure-vessel plate. Tensile is 485–620 MPa and yield is 310 MPa min. SHH STEEL supplies A387GR2CL2 worldwide as a global steel mill sourcing partner.View More -
ASTM A387 Grade 2 Class 1 Steel Plate | A387 Gr.2 Cl.1 0.5Cr-0.5Mo Vessel Plate
ASTM A387 Grade 2 Class 1 / A387 Gr.2 Cl.1 is 0.5Cr-0.5Mo pressure-vessel plate. Tensile is 380–550 MPa and yield is 230 MPa min. SHH STEEL supplies A387GR2CL1 worldwide as a global steel mill sourcing partner.View More
ASTM A387 Carbon Steel Plates
Boiler & Pressure Vessel Steel Plates
SHH STEEL, a trusted Pressure Vessel Steel Plates exporter, produces and exports pressure vessel steel plates for boilers, tanks, and petrochemical applications. Our plates, like ASTM A516 Grade 70, offer high tensile strength and toughness, meeting ASME standards. With a 5,000-ton inventory, we ensure 3–5 day delivery for in-stock items, supported by SGS/TUV inspections and mill certificates. Rely on SHH STEEL for boiler steel plates and custom high-pressure solutions.
Boiler & Pressure Vessel Steel Plates
ASME SA-36/SA-36M
ASME SA302
ASTM A302
ASME SA225
ASTM A225
ASME SA455
ASME SA562
ASTM A455
ASTM A562
ASME SA841
GB/T 713.3-2023
GB/T 713.4-2023
GB/T 713.5-2023
ASME SA516
GOST 5520
ASTM A516/516M
GB/T 3077
GB/T 3274
DIN 17102
GB/T 24511
GB/T 24512
GB/T 3077
ASTM A285
ASME SA285
ASTM A515
ASME SA515
ASTM A299
ASTM A517/A517M
ASME SA299
ASTM A204
ASME SA517/SA517M
ASME SA204
ASTM A203
ASME SA203
ASTM A353
ASME SA353
ASTM A387
ASME SA387
ASTM A537
ASME SA537
JIS G3115
GB/T 713.2-2023
GB/T 19189
GB/T 3531
EN 10028-2
EN 10028-3
EN 10028-4
EN 10028-5
EN 10028-6
JIS G3103
ISO 9328-2
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