Home > Forged Fittings > Stainless Steel 348/348H Forged Fittings
Vinit Stainless is one of the prominent manufacturer and supplier of SS 348 forged fittings in Chennai, India. Renowned for manufacturing high-performance stainless steel parts, Vinit Stainless offers reliable solutions for key industrial systems. SS 348 is a niobium-stabilized austenitic stainless steel that is highly suitable for high-temperature and corrosive usage, particularly where welding is concerned. Our SS 348 forged fittings are precision manufactured to provide enhanced intergranular corrosion, thermal fatigue, and oxidation resistance. For aerospace, power generation, and chemical process industries, Vinit‘s forged fittings provide the best performance and extended service life in the toughest operating conditions.
SS 348 forged fittings consist of 17–20% Chromium and 9–13% Nickel and are stabilized with niobium (columbium). The niobium content avoids sensitization upon welding, providing improved corrosion resistance. Mechanical properties are a tensile strength of approximately 515 MPa and yield strength of 205 MPa. These fittings have good ductility, toughness, and high-temperature creep resistance. The stabilized structure provides improved durability in welded and thermal cycling conditions, so SS 348 forged fittings are best suited for high temperature and pressure conditions.
| STANDARD | Stainless Steel 348/348H Forged Fittings |
| 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 348/348H | 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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SS 348 forged fittings are found in applications involving high temperature and corrosive materials, especially in the aerospace and nuclear industries. They are suitable for high-pressure piping in heat exchangers, reactors, superheaters, and steam lines. The fittings are also utilized extensively in chemical processing units and power plants for connecting pipes that have constant changes in temperature. Due to their niobium stabilization, these fittings work outstandingly well in welded systems without posing intergranular corrosion. They can withstand oxidation and retain their mechanical strength due to which they are a key element in high-stress applications.
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