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SS 348H Sheet and Plates are stabilized austenitic stainless steels with improved high-temperature strength and creep resistance. Supplied by Andre Stainless in Singapore, SS 348H contains additions of niobium and tantalum to avoid intergranular corrosion in sensitized situations. It is designed specifically for application in high-temperature service atmospheres, such as pressure vessels and heat exchangers. The “H” marking signifies increased carbon levels to ensure greater strength at higher conditions. SS 348H provides reliable mechanical properties, carbide precipitation resistance, and very good weldability. It is ASTM A240 and ASME SA240 compliant and thus a suitable solution for high-performance thermal and chemical processing equipment.
SS 348H has 17–19% chromium, 9–13% nickel, ≤0.10% carbon, and niobium (10x carbon content) for stabilizing. It provides tensile strength between 550–750 MPa, yield strength between 240–290 MPa, and elongation of approximately 35%. The alloy does not sensitize when welded or heated for a long duration. It is excellent in temperatures up to 900°C and oxidation and thermal fatigue resistance. SS 348H retains structural integrity in stress corrosion cracking susceptible environments. It is non-magnetic, provides good creep strength, and is resistant to formability and weldability even on prolonged exposure to high temperatures in severe industrial applications.
| STANDARD | Stainless Steel 348H Sheet and Plate |
| EN | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
| JIS | SUS 316L |
| BS | 316S11 / 316S13 |
| UNS | S31603 |
| WERKSTOFF NO. | 1.4404 / 1.4435 |
| AFNOR | Z7CND17‐11‐02 |
| GOST | 03Ch17N14M3 / 03Ch17N14M2 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 348H | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 10 | – |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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Stainless Steel 348H Hot Rolled Sheet and Plates have excellent high-temperature strength and resistance to oxidation. They are suitable for chemical processing equipment, aerospace components, and other high-temperature applications where durability and performance are critical.
Stainless Steel 348H Cold Rolled Sheet and Plates are ideal for high-performance applications in chemical processing and aerospace due to a smooth surface finish and precise dimensions. They also offer long-lasting durability due to their resistance to high temperatures and corrosion.
Stainless Steel 348H Chequered Sheet and Plates are used for slip resistance and durability in flooring, stair treads, and industrial settings. These exhibit excellent performance in high-temperature environments and harsh conditions.
Stainless Steel 348H Perforated Sheet and Plates are used in filtration, ventilation, and architectural applications. They provide high-temperature resistance along with strength with functional perforations that are apt for structural applications and designs in challenging environments.
Stainless Steel 348H Shim Sheet and Plates are used for the precise spacing and alignment of machinery and equipment. Their mechanical properties and high-temperature resistance make them ideal for critical applications where there is a need for high precision tolerances and durability.
Stainless Steel 348H Polished Sheet and Plates have a quality reflective finish and are available for decorative and architectural applications. It offers high temperature and corrosion resistance, bringing beauty and durability in harsh environments.
SS 348H Sheets and Plates are best suited for heat exchanger tubes, boiler parts, pressure vessels, and chemical process piping. It is commonly utilized in the components of power plants, petrochemical equipment, furnace components, and thermal oxidizers where high temperature and creep strength are needed. In food processing and pharmaceutical production, SS 348H is used where heat resistance and cleanliness are needed. It‘s also utilized in exhaust manifolds, engine parts, and aerospace heat shields. The stability of the alloy to welding and thermal cycling renders it useful for conditions that demand strength as well as resistance to carbide precipitation over longer thermal service lifetimes.
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