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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.

ASTM A387 Grade 911 Class 2 9Cr-1Mo-V-W pressure vessel steel plate, SHH STEEL

ASTM A387 Grade 911 Class 2 Steel Plate | A387 Gr.911 Cl.2 9Cr-1Mo-V Vessel Plate

ASTM A387 Grade 911 Class 2 / A387 Gr.911 Cl.2 is 9Cr-1Mo-1W-V-Nb vessel plate. Tensile is 620–840 MPa and yield is 440 MPa min. SHH STEEL supplies A387GR911CL2 worldwide as a global steel mill sourcing partner.

ASTM A387 Grade 21L Class 1 low-carbon 3Cr-1Mo pressure vessel steel plate, SHH STEEL

ASTM A387 Grade 21L Class 1 Steel Plate | A387 Gr.21L Cl.1 3Cr-1Mo Vessel Plate

ASTM A387 Grade 21L Class 1 / A387 Gr.21L Cl.1 is low-carbon 3Cr-1Mo pressure-vessel plate. Tensile is 415–585 MPa and yield is 205 MPa min. SHH STEEL supplies A387GR21LCL1 worldwide as a global steel mill sourcing partner.

ASTM A387 Grade 22L Class 1 low-carbon 2.25Cr-1Mo pressure vessel steel plate, SHH STEEL

ASTM A387 Grade 22L Class 1 Steel Plate | A387 Gr.22L Cl.1 2.25Cr-1Mo Vessel Plate

ASTM A387 Grade 22L Class 1 / A387 Gr.22L Cl.1 is low-carbon 2.25Cr-1Mo pressure-vessel plate. Tensile is 415–585 MPa and yield is 205 MPa min. SHH STEEL supplies A387GR22LCL1 worldwide as a global steel mill sourcing partner.

ASTM A387 Grade 91 Class 2 9Cr-1Mo-V pressure vessel steel plate, CSEF Grade 91, SHH STEEL

ASTM A387 Grade 22 Class 2 Steel Plate | A387 Gr.22 Cl.2 2.25Cr-1Mo Vessel Plate

ASTM A387 Grade 22 Class 2 / A387 Gr.22 Cl.2 is 2.25Cr-1Mo pressure-vessel plate. Tensile is 515–690 MPa and yield is 310 MPa min. SHH STEEL supplies A387GR22CL2 worldwide as a global steel mill sourcing partner. SEO Title

ASTM A387 Grade 22 Class 1 chromium-molybdenum pressure vessel steel plate, 2.25Cr-1Mo, SHH STEEL

ASTM A387 Grade 22 Class 1 Steel Plate | A387 Gr.22 Cl.1 2.25Cr-1Mo Vessel Plate

ASTM A387 Grade 22 Class 1 / A387 Gr.22 Cl.1 is 2.25Cr-1Mo pressure-vessel plate. Tensile is 415–585 MPa and yield is 205 MPa min. SHH STEEL supplies A387GR22CL1 worldwide as a global steel mill sourcing partner.

ASTM A387 Carbon Steel Plates

ASTM A387 Grade 911 Class 2 Steel Plate \| A387 Gr.911 Cl.2 9Cr-1Mo-V Vessel Plate	ASTM A387 Grade 21L Class 1 Steel Plate \| A387 Gr.21L Cl.1 3Cr-1Mo Vessel Plate	ASTM A387 Grade 22L Class 1 Steel Plate \| A387 Gr.22L Cl.1 2.25Cr-1Mo Vessel Plate	ASTM A387 Grade 91 Class 2 Steel Plate \| A387 Gr.91 Cl.2 9Cr-1Mo-V Vessel Plate
ASTM A387 Grade 9 Class 2 Steel Plate \| A387 Gr.9 Cl.2 9Cr-1Mo Vessel Plate	ASTM A387 Grade 9 Class 1 Steel Plate \| A387 Gr.9 Cl.1 9Cr-1Mo Vessel Plate	ASTM A387 Grade 5 Class 2 Steel Plate \| A387 Gr.5 Cl.2 5Cr-0.5Mo Vessel Plate	ASTM A387 Grade 5 Class 1 Steel Plate \| A387 Gr.5 Cl.1 5Cr-0.5Mo Vessel Plate
ASTM A387 Grade 21 Class 2 Steel Plate \| A387 Gr.21 Cl.2 3Cr-1Mo Vessel Plate	ASTM A387 Grade 21 Class 1 Steel Plate \| A387 Gr.21 Cl.1 3Cr-1Mo Vessel Plate	ASTM A387 Grade 22 Class 2 Steel Plate \| A387 Gr.22 Cl.2 2.25Cr-1Mo Vessel Plate	ASTM A387 Grade 22 Class 1 Steel Plate \| A387 Gr.22 Cl.1 2.25Cr-1Mo Vessel Plate
ASTM A387 Grade 11 Class 2 Steel Plate \| A387 Gr.11 Cl.2 1.25Cr-0.5Mo Vessel Plate	ASTM A387 Grade 11 Class 1 Steel Plate \| A387 Gr.11 Cl.1 1.25Cr-0.5Mo Vessel Plate	ASTM A387 Grade 12 Class 2 Steel Plate \| A387 Gr.12 Cl.2 1Cr-0.5Mo Vessel Plate	ASTM A387 Grade 12 Class 1 Steel Plate \| A387 Gr.12 Cl.1 1Cr-0.5Mo Vessel Plate
ASTM A387 Grade 2 Class 2 Steel Plate \| A387 Gr.2 Cl.2 0.5Cr-0.5Mo Vessel Plate	ASTM A387 Grade 2 Class 1 Steel Plate \| A387 Gr.2 Cl.1 0.5Cr-0.5Mo Vessel Plate

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.