K M D Steel And Tube is the best performing manufacturers, stockists, supplier & exporter for SS 321/321H Forged Fittings. The 321/321H is titanium based settled austenitic SS grade with astounding general erosion obstruction. It even has extraordinary protection from intergranular consumption after the introduction to various temperatures. The compound regularly opposes oxidation at a temperature of upto 1500 deg f and has high pressure and creep burst highlights. The Alloy 321H is like compound 321 however has higher carbon content. The expansion of carbon substance to this compound upgrades creep obstruction and builds high quality at 1000 deg f. The compound can't be solidified at heat treatment however can be solidified by cool working and is welded just as handled by standard creation rehearses. our SS 321/321H Forged Fittings are likewise known for their astounding quality, high grating safe, high strength, great toughness, high protection from erosion, low upkeep cost and more. The SS 321/321H Forged Fittings are made in different shapes, size & dimensions and are delivered to customers as per their need & requirement. The prices for these Forged Fittings are completely market friendly and customer oriented. The Forged Fittings are made of best quality raw material and do match national and international quality standard and this helps us to have high demand from our customers.
| Grade | SS 321(UNS S32100) SS 321H(UNS S32109) |
|---|---|
| Werkstoff Nr | 321 / 1.4541 321H / 1.4878 |
| Standard | ASTM A182 / ASME SA182 |
| Specification | ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size | ½” NB – 4” NB |
| Class | 2000LBS, 3000LBS, 6000LBS, 9000LBS, etc. |
| Type | Socket Weld (S/W) & SCREWED (SCRD) – NPT, BSP, BSPT, Threaded Fitting |
| % | Cr | Ni | C | Si | Mn | P | S | N | Ti | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 321 | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
max:0.08 | max:0.75 | max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
| 321H | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
min:0.04 max:0.10 |
min:18.0 max:20.0 |
max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
| Grade | Tensile Strength ksi (min.) |
Yield Strength 0.2% Offset ksi (min.) |
Elongation - % in 50 mm (min.) |
Hardness (Brinell) MAX |
|---|---|---|---|---|
| 321/321H | 75 | 30 | 40 | 217 |
| Denstiy lbm/in3 |
Coefficient of Thermal Expansion (min/in)-°F |
Thermal Conductivity BTU/hr-ft-°F | Specific Heat BTU/lbm -°F | Modules of Elasticity (annealed)2-psi | |
|---|---|---|---|---|---|
| at 68 °F | at 68 – 212°F | at 68 – 1832°F | at 200°F | at 32 – 212°F | in tension (E) |
| 0.286 | 9.2 | 20.5 | 9.3 | 0.12 | 28 x 106 |