K M D Steel And Tube is a dominant manufacturers, stockists, supplier & exporter for SS 321/321H Buttweld Fittings. The Alloy 321 is titanium settled austenitic Stainless Steel buttweld Fittings with great general corrosion resistance. The General uses of our Stainless Steel 321H Buttweld Fittings are in chemical processing, Food Processing- storage & machinery, aerospace and more. These Buttweld Fittings are made in different shapes, size & dimension and are delivered to customers as per their need & requirement. The Prices for these Buttweld Fittings are completely market friendly and customer oriented. When it comes to packaging it is done with ultimate care because we know the ups & downs faced while import & export of product hence we make sure the goods are delivered in good conditions without any damages. These Buttweld Fittings are made of best quality raw material and do match national & international quality standard and this helps us to have high demand in the market from our customer.
| Grade | SS 321(UNS S32100) SS 321H(UNS S32109) |
|---|---|
| Werkstoff Nr | 321 / 1.4541 321H / 1.4878 |
| Dimension Std. | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Specification | ASTM A403 / ASME SA403 |
| Size | ½” NB – 48” NB |
| Schedule | SCH 10 – SCH XXS |
| Type | Seamless / ERW / Welded / Fabricated |
| % | 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 |