These 321 Stainless Steel Forged Socket Weld Fitting offers higher creep and stress rupture properties than Alloy 304 and, particularly, Alloy 304L, which might also be considered for exposures where sensitization and inter - granular corrosion are concerns. Our 321 Stainless Steel Forged Threaded Fittingsis used extensively for applications where the addition of titanium and its stabilizing effect as a carbide forming element allows it to be welded and/or used within the carbide precipitation range 430 Degree C – 870 Degree C without the risk of inter - granular corrosion. In order to provide optimum resistance to inter - granular corrosion in these SS 321 Forged Socket Weld Fittingsand to polythionic acid stress corrosion cracking in service temperatures at 1500 Degree F – 1650 Degree F, an air cool may be used. Our Stainless Steel 321 Forged Threaded Fittings has similar corrosion behavior to Type 304 with the exception of improved inter - granular corrosion resistance due to the titanium addition for stabilization.
LIST OF STAINLESS STEEL 321/321H FORGED FITTINGS
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- 321 STEEL FORGED THREADED FITTING
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- SS 321H FORGED SOCKETWELD FITTINGS
This Stainless Steel 321H Forged Fittings has a maximum use temperature of 1500 Degree F (816 Degree C) for code applications like Type 304, whereas Type 304L is limited to 800 Degree F (426 Degree C). Like other austenitic grades, our Stainless Steel 321 Forged Fitting have excellent forming and welding characteristics, are readily brake or roll formed and have outstanding welding characteristics. We are a known stockist of SS 321 / 321H Forged Fittings, which is not subject to weld decay (inter - granular corrosion) when exposed to mildly corrosive environments.
Equivalent Grades for 321/321H Stainless Steel Threaded Fittings
| Grade | North America | France | European | Japan | Russia | European | Italy | Austria | Sweden |
| UNS | AFNOR | W.N. | JIS | GOST | EN | UNI | ONORM | SIS | |
| SS 321 | S32100 | – | 1.4541 | SUS 321 | – | X6CrNiTi18-10 | – | – | – |
321/321H SS Socketweld Fitting Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Tie |
| SS TP 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
Stainless Steel 321/321H Forged Fittings Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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