The basic material for Stainless Steel 321 is austenitic 18/8 steel (Grade 304). By adding titanium, it is stabilized. The reason SS 321 is utilized is that, following heating within the carbide precipitation range of 425-850°C, they are not subject to intergranular corrosion. As a result of its high strength, resistance to scaling, phase instability, and subsequent resistance to aqueous corrosion, stainless steel 321 is the preferred grade for applications in the range of temperatures up to about 900°C.
SS 321H is a modified form of SS 321 that contains a higher amount of carbon for improved strength at high temperatures. Heat exchangers, expansion joints, bellows, furnace components, heating element tubing, high-temperature screens, and spiral welded tube for burner pipes and flues are all constructed from grade SS321/ 321H.
| USA | France | Germany | Germany | Italy | Japan | Russia | Spain | Sweden | UK | European Union |
| AISI | AFNOR | DIN 17006 | W.N. 17007 | UNI | JIS | GOST | UNE | SIS | BSI | EURONORM |
| 321 | Z 6 CNT 18-10 | X 6 CrNiTi 18 10 X 12 CrNiTi 18 9 | 1.4541 1.4878 | X 6 CrNiTi 1811 | SUS 321 | 12KH18N10T | X 6 CrNiTi 18-11 | 23 37 | 321S31 | X 6 CrNiTi 18 10 |
| 321H | X 8 CrNiTi 1811 | SUS 321H | X 7 CrNiTi 18-11 | 321S20 |
If you are looking for best prices for 321 Stainless Steel, 321 SS Material email us on info@duplexsteelalloys.com or call us on +91 9664408767
| Sheet / Plate | Pipe | Buttweld Fittings | Flanges | Forged Fittings | Fasteners | Bars |
| ASTM A240 | ASTM A312 / S358 | ASTM A403 | ASTM A182 | ASTM A182 | ASTM A193 / A194 | ASTM A276 |
| Grade | C | N | Si | P | S | Cr | Mn | Ni | Fe | Ti |
| 321 | 0.08 max | 0.10 max | 1.0 max | 0.045 max | 0.03 max | 17.0 - 19.0 | 2.0 max | 9.0 - 12.0 | Remainder | 5x(C+N)-0.70 |
|---|---|---|---|---|---|---|---|---|---|---|
| 321H | 0.04 - 0.10 | 0.10 max | 1.0 max | 0.045 max | 0.03 max | 17.0 - 19.0 | 2.0 max | 9.0 - 12.0 | Remainder | 4x(C+N)-0.70 |
| Tensile Strength (ksi) | 0.2% Yield Strength (ksi) | Elongation% in 2 inches |
|---|---|---|
| 75 | 30 | 40 |
| Units | Temperature in °C | |
|---|---|---|
| Density | 7.92 g/cm³ | Room |
| Specific Heat | 0.12 Kcal/kg.C | 22° |
| Melting Range | 1371 - 1400 °C | - |
| Modulus of Elasticity | 193 KN/mm² | 20° |
| Electrical Resistivity | 72 µΩ.cm | Room |
| Coefficient of Expansion | 16.6 µm/m °C | 20 - 100° |
| Thermal Conductivity | 16.0 W/m -°K | 20° |
