Henan Sheng He Pipe Industry Co., Ltd., have an experience spanning for over ten years, producing and supplying best-in-class products, minimize cost by getting manufacturing processes under one roof and delivering consignments on a daily basis only because of a diligent and dedicated team. We are manufacturers, suppliers and exporters of Stainless Steel 321/321H material.
UNS – S32100 / S32109
SS 321 is titanium settled austenitic stainless steel with greater general corrosion resistance. It has phenomenal resistance to intergranular corrosion after presentation to temperatures in the chromium carbide precipitation scope of 800–1500°F (427–816°C).
The SS maintains oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than SS 304 and 304L. It also maintains good low temperature toughness. SS 321H is the higher carbon (0.04–0.10) version of the SS. It was produced to improve creep resistance and for higher strength at temperatures above 1000°F (537°C). In most occurrences, the carbon content of the plate enables dual certification.
SS 321 cannot be hardened by heat treatment, just by cold working. It can be effectively welded and processed by standard shop fabrication practices.
Characteristics
- Oxidation resistant to 1600°F
- Stabilized against weld heat affected zone (HAZ) intergranular corrosion
- Resists polythionic acid stress corrosion cracking
Applications
- Aircraft piston engine manifolds and exhaust stacks
- Expansion joints
- Thermal oxidizers
- Refinery equipment
- High temperature chemical process equipment
- Food Processing equipment and storage
Sheng He Pipe Industry offers Stainless Steel 321/321H in a variety of forms, including:
- Pipe & Welded pipe
- Pipe fittings
- Seamless tube & Welded tube
- Flanges
- Bar
- Sheet
- Wire
- Plate
- Forgings
- Weld Rod
Chemical Composition %
| 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 |
Mechanical Properties
| Tensile Strength (ksi) | 0.2% Yield Strength (ksi) | Elongation% in 2 inches |
| 75 | 30 | 40 |
Physical Properties
| 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° |
ASTM Specifications
| Pipe / Tube (SMLS) | Sheet / Plate | Bar | Forging | Fitting |
| A 213, A 249 | A 167, A 240 | A 276 | A 182 | A403 |