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Grade | UNS No. | C | Mn | P max | S max | Si | Cr | Mo |
SA387 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 |
Grade | UNS No. | Yield strength ReH MPa min | Tensile strength Rm MPa | Elongation A% min | |
200mm | 50mm | ||||
SA387 Grade 21L class 1 | K31545 | 205 | 415-585 | - | 18 |
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 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 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,