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A387 Grade 11 steel Plate

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Product: Hot rolled chromium-molybdenum alloy steel plates intended particularly for welded boilers and pressure vessels designed for elevated temperature service.
A387 Grade 11 steel product available : A387 Grade 11 Steel plates, A387 Grade 11 steel sheets,
A387 Grade 11 steel standard :ASTM A387/A387M
ASTM A387/A387M A387 Grade 11 specification includes two classes : A387 Grade 11 Class 1, A387 Grade 11 Class 2,
A387 Grade 11 delivery condition: Thermally treated, A(Annealed),N&T (Normalized + Tempered), Q&T(Quenched+Tempered)

A387 Grade 11 pressure vessel steel chemical composition %

Grade UNS No. C Mn P max S max Si Cr Mo
A387 Grade 11 K11789 0.05-0.17 0.40-0.65 0.025 0.025 0.50-0.80 1.00-1.50 0.45-0.60

A387 Grade 11 pressure vessel steel Mechanical properties
Grade UNS No. Yield strength ReH MPa min Tensile strength Rm MPa Elongation A% min
200mm 50mm
A387 Grade 11 class 1 K11789 240 415-585 19 22
A387 Grade 11 class 2 310 515-690 18 22


JOIN-WIN STEEL keeps enough quantity A387 Grade 11 steel in stock each month. We can meet our customer’s further process request like : cutting ( any size and any shape ) drilling, welding, milling, machining and steel structure.

Others steel grades steel plate for pressure vessel and boiler equipment in the standard ASTM A387/A387M and ASME SA387/SA387M:
A387 Grade 2 alloy steel plate for pressure vessels,
A387 Grade 12 alloy steel plate for pressure vessels,
A387 Grade 22 alloy steel plate for pressure vessels,
A387 Grade 22L alloy steel plate for pressure vessels,
A387 Grade 21 alloy steel plate for pressure vessels,
A387 Grade 21L alloy steel plate for pressure vessels,
A387 Grade 5 alloy steel plate for pressure vessels,
A387 Grade 9 alloy steel plate for pressure vessels,
A387 Grade 91 alloy steel plate for pressure vessels,
SA387 Grade 2 alloy steel plate for pressure vessels,
SA387 Grade 12 alloy steel plate for pressure vessels,
SA387 Grade 11 alloy steel plate for pressure vessels,
SA387 Grade 22 alloy steel plate for pressure vessels,
SA387 Grade 22L alloy steel plate for pressure vessels,
SA387 Grade 21 alloy steel plate for pressure vessels,
SA387 Grade 21L alloy steel plate for pressure vessels,
SA387 Grade 5 alloy steel plate for pressure vessels,
SA387 Grade 9 alloy steel plate for pressure vessels,
SA387 Grade 91 alloy steel plate for pressure vessels,

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