SHH Stainless export ASTM A240 Stainless coils, ASTM A240 Stainless sheets and focus on one stop Solution at stainless steel material
This table provides a comprehensive overview of the most commonly referenced ASTM A240 grades, their UNS numbers, stainless steel family, and typical applications. For detailed specifications, consult the latest ASTM A240/A240M standard
ASTM A240 is a specification developed by the American Society for Testing and Materials (ASTM) that outlines the requirements for chromium and chromium-nickel stainless steel plates, sheets, and strips used in pressure vessels and general applications. It covers a wide range of stainless steel grades, including austenitic, ferritic, martensitic, duplex, super duplex, and high-molybdenum alloys, specifying their chemical composition, mechanical properties, and dimensions. The standard ensures high quality, corrosion resistance, and mechanical strength for applications in industries such as construction, chemical processing, petrochemical, automotive, and medical equipment. It also provides guidelines for sampling, testing, and certification to ensure compliance and reliability
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| Type | Grade(s) | UNS Number(s) | Notes |
| Austenitic | A240 201, A240 201LNG | S20100, S20153 | Lower Ni, N-enhanced (Scribd) |
| A240 202 | S20200 | General-purpose | |
| A240 301, A240 301L, A240 301LN | S30100, S30153 | High-strength | |
| A240 302, A240 302B, A240 303, A240 303Se | S30200, S30215, S30300, S30323 | Free-machining variants | |
| A240 304, A240 304L, A240 304Cu, A240 304N | S30400, S30403, S30430, S30451 | “18‑8” classics, Cu/N variants | |
| A240 305 | S30500 | High Ni (10–13 %) | |
| A240 309, A240 309S, A240 310, A240 310S | S30900, S30908, S31000, S31008 | Heat-resistant | |
| A240 314 | S31400 | High‑temp alloy | |
| A240 316, A240 316L, A240 316F, A240 316N | S31600, S31603, S31620, S31651 | Marine-grade with Mo | |
| A240 317, A240 317L | S31700, S31703 | Higher Mo | |
| A240 321, A240 321H | S32100, S32109 | Ti‑stabilized | |
| A240 329 | S32900 | Mo/N variant | |
| A240 330 | N08330 | High-temperature Ni-Cr alloy | |
| A240 347, A240 347H | S34700, S34709 | Nb-stabilized | |
| A240 348 | S34800 | Nb/Ta stabilized | |
| A240 800G, A240 800HG | N08800, N08810 | Heat-resistant 800-series | |
| A240 904L | N08904 | Super-austenitic with Mo/ Cu | |
| A240 8925, A240 8926 | N08925, N08926 | Higher Mo/N | |
| A240 20 (Alloy 20) | N08020 | For chemical handling | |
| Ferritic | A240 409, A240 409L/M/I | S40900 etc. | Auto exhaust steels |
| A240 430, A240 430F | S43000, S43020 | Decorative ferritic | |
| A240 434 | S43400 | Mo ferritic | |
| A240 436 | — | Deep-drawing ferritic | |
| A240 439 | S43940 | Weather-resistant | |
| A240 444 | S44400 | High Mo ferritic | |
| Martensitic | A240 410, A240 410S, A240 420, A240 431, A240 415 | S41000, S41008, S42000, S43100,S41500 | Heat-treatable, cutlery steels |
| Duplex / Super‑duplex | A240 2205 | S31803 | Standard duplex |
| A240 2304 | S32304 | Lean duplex | |
| A240 2507 | S32750 | Super-duplex | |
| A240 255 | S32550 | Enhanced super-duplex | |
| A240 329 | S32900 | Duplex/high-strength | |
| Zeron‑100 | S32760 | Super-duplex | |
| Precipitation-hardening | A240 630 | S17400 | 17‑4 PH stainless |
| High-Mo Austenitic (6 Mo) | A240 254SMO | S31254 | Extreme corrosion resistance |