ASTM A387 — Pressure vessel plates, alloy steel, chromium-molybdenum
ASTM A387 covers chromium-molybdenum alloy steel plates for welded boilers and pressure vessels for elevated-temperature service, in Grades 2, 5, 9, 11, 12, 21, 22 and 91, each in Class 1 or Class 2 strength levels.
ASTM A387 at a glance
| Standard | ASTM A387 |
|---|---|
| Issued by | ASTM / ASME (SA-387) |
| Product form | Plate |
| Typical use | Chrome-moly vessel plate |
| Grades on this site | 3 |
Equivalent and related standards
ASTM A387 grades — chemistry and mechanical properties
| Grade | UNS | C% | Cr% | Ni% | Mo% | YieldMPa min | TensileMPa min |
|---|---|---|---|---|---|---|---|
| ASTM A387 Grade 11 Cl.2 | K11789 | 0.05–0.17 | 1.00–1.50 | — | 0.45–0.65 | 310 | 515 |
| ASTM A387 Grade 22 Cl.2 | K21590 | 0.05–0.15 | 2.00–2.50 | — | 0.90–1.10 | 310 | 515 |
| ASTM A387 Grade 91 Cl.2 | K90901 | 0.08–0.12 | 8.00–9.50 | 0.40 max | 0.85–1.05 | 415 | 585 |
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
FAQ
ASTM A387: common questions
Which grades does ASTM A387 cover?
On this site: ASTM A387 Grade 11 Cl.2, ASTM A387 Grade 22 Cl.2, ASTM A387 Grade 91 Cl.2. Open any grade for its full chemical composition, mechanical properties and PDF data sheet.
Does Teshi Group supply material to ASTM A387?
Teshi Group manufactures flanges, fittings, fasteners and valves, and supplies pipes and plates, to ASTM / ASME specifications and to equivalent EN, JIS, GB and IS standards on request, with EN 10204 3.1 certificates. Send your requirement to info@teshigroup.com.
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