SHH Stainless export ASME SA240 Stainless coils, ASME SA240 Stainless sheets and focus on one stop Solution at stainless steel material
This table provides a comprehensive overview of the most commonly referenced ASME SA240 grades, their UNS numbers, stainless steel family, and typical applications. For detailed specifications, consult the latest ASME SA240/SA240M standard
ASME SA240 is a specification published by the American Society of Mechanical Engineers (ASME) that mirrors ASTM A240, covering chromium and chromium-nickel stainless steel plates, sheets, and strips for pressure vessels and general applications. It is used in the ASME Boiler and Pressure Vessel Code (BPVC) and other ASME standards, ensuring materials meet stringent requirements for corrosion resistance, mechanical properties, and dimensional tolerances. SA240 is essentially identical to ASTM A240 but is adopted for ASME applications, with minor differences in certification, testing, or marking to align with ASME code requirements. It includes austenitic, ferritic, martensitic, duplex, super duplex, and high-molybdenum stainless steel grades for industries like chemical processing, petrochemical, and power generation.
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| Type | Grade(s) | UNS Number(s) | Notes |
| Austenitic | SA240 201, SA240 201LNG | S20100, S20153 | Lower Ni, N-enhanced (Scribd) |
| SA240 202 | S20200 | General-purpose | |
| SA240 301, SA240 301L, SA240 301LN | S30100, S30153 | High-strength | |
| SA240 302, SA240 302B, SA240 303, SA240 303Se | S30200, S30215, S30300, S30323 | Free-machining variants | |
| SA240 304, SA240 304L, SA240 304Cu, SA240 304N | S30400, S30403, S30430, S30451 | “18‑8” classics, Cu/N variants | |
| SA240 305 | S30500 | High Ni (10–13 %) | |
| SA240 309, SA240 309S, SA240 310, SA240 310S | S30900, S30908, S31000, S31008 | Heat-resistant | |
| SA240 314 | S31400 | High‑temp alloy | |
| SA240 316, SA240 316L, SA240 316F, SA240 316N | S31600, S31603, S31620, S31651 | Marine-grade with Mo | |
| SA240 317, SA240 317L | S31700, S31703 | Higher Mo | |
| SA240 321, SA240 321H | S32100, S32109 | Ti‑stabilized | |
| SA240 329 | S32900 | Mo/N variant | |
| SA240 330 | N08330 | High-temperature Ni-Cr alloy | |
| SA240 347, SA240 347H | S34700, S34709 | Nb-stabilized | |
| SA240 348 | S34800 | Nb/Ta stabilized | |
| SA240 800G, SA240 800HG | N08800, N08810 | Heat-resistant 800-series | |
| SA240 904L | N08904 | Super-austenitic with Mo/ Cu | |
| SA240 8925, SA240 8926 | N08925, N08926 | Higher Mo/N | |
| SA240 20 (Alloy 20) | N08020 | For chemical handling | |
| Ferritic | SA240 409, SA240 409L/M/I | S40900 etc. | Auto exhaust steels |
| SA240 430, SA240 430F | S43000, S43020 | Decorative ferritic | |
| SA240 434 | S43400 | Mo ferritic | |
| SA240 436 | — | Deep-drawing ferritic | |
| SA240 439 | S43940 | Weather-resistant | |
| SA240 444 | S44400 | High Mo ferritic | |
| Martensitic | SA240 410, SA240 410S, SA240 420, SA240 431, SA240 415 | S41000, S41008, S42000, S43100,S41500 | Heat-treatable, cutlery steels |
| Duplex / Super‑duplex | SA240 2205 | S31803 | Standard duplex |
| SA240 2304 | S32304 | Lean duplex | |
| SA240 2507 | S32750 | Super-duplex | |
| SA240 255 | S32550 | Enhanced super-duplex | |
| SA240 329 | S32900 | Duplex/high-strength | |
| Zeron‑100 | S32760 | Super-duplex | |
| Precipitation-hardening | SA240 630 | S17400 | 17‑4 PH stainless |
| High-Mo Austenitic (6 Mo) | SA240 254SMO | S31254 | Extreme corrosion resistance |