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A387 Grade 21L 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 21L steel product available : A387 Grade 21L Steel plates, A387 Grade 21L steel sheets,
A387 Grade 21L steel standard :ASTM A387/A387M
A387 Grade 21L delivery condition: Thermally treated, A(Annealed),N&T (Normalized + Tempered), Q&T(Quenched+Tempered)

A387 Grade 21L pressure vessel steel chemical composition %

Grade UNS No. C Mn P max S max Si Cr Mo
A387 Grade 21L K31545 0.10 max 0.30-0.60 0.025 0.025 0.50 max 2.75-3.25 0.90-1.10

A387 Grade 21L pressure vessel steel Mechanical properties
Grade UNS No. Yield strength ReH MPa min Tensile strength Rm MPa Elongation A% min
200mm 50mm
A387 Grade 21L class 1 K31545 205 415-585 - 18


JOIN-WIN STEEL keeps enough quantity A387 Grade 21L 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 11 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 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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