Alloy 321h
Alloy 321 (UNS S32100) is titanium stabilized austenitic stainless steel plate with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 - 1500°F (427 - 816°C). The alloy...
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Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of alloy 321h in China. With abundant experience, we warmly welcome you to wholesale customized alloy 321h from our factory. For price consultation, contact us.
Alloy 321 (UNS S32100) is titanium stabilized austenitic stainless steel plate with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 - 1500°F (427 - 816°C). The alloy resists oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than alloys 304 and 304L. It also possesses good low temperature toughness.
Alloy 321H (UNS S 32109) stainless steel plate is the higher carbon (0.04 - 0.10) version of the alloy. It was developed for enhanced creep resistance and for higher strength at temperatures above 1000oF (537°C). In most instances, the carbon content of the plate enables dual certification.
Alloy 321 stainless steel plate cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices.
Type 321H, is a titanium stabilized austenitic stainless steel that is known for its general corrosion resistance. This higher carbon version of Type 321 stainless steel offers a wide variety of benefits including:
Excellent resistance oxidation to 1500°F (816°C)
Good low temperature toughness
Comparable corrosion resistance and machinability to Type 304
Readily welded by most standard processes
Very ductile and forms easily
Because of Type 321H’s features and properties, it can be found in use in a number of industries and critical applications including:
Expansion joints
Chemical and Petrochemical processing
Pharmaceutical production
Waste treatment including thermal oxidizers
Equipment and storage units for Food processing
Aerospace applications
Chemical Composition (%) of 321H Stainless Steel Plate
| Carbon | Silicon | Sulfur | Phosphorus | Chromium | Titanium | Manganese | Nickel | Nitrogen |
| 0.04-0.14 | 0.75 | 0.03 | 0.045 | 17.0-19.0 | 4 x (C + N) min.-0.70 max. | 2.00 | 9.0-12.0 | 0.10 |
Mechanical Properties of 321H Stainless Steel Plate
| Yield Strengtd 0.2% Offset |
Ultimate Tensile Strength |
Elongation in 2 in. |
Hardness | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (min.) | (max.) |
| 30,000 | 205 | 75,000 | 515 | 40 | 217 Brinell |
Physical Properties of 321H Stainless Steel Plate
| Density lb/inᶟ | 0.286 |
| Density g/cmᶟ | 7.920 |
| Melting Range | 2550-2635°F/1398 – 1446 °C |
| Thermal Conductivity at 212°F (100°C) | 9.3 BTU/hr/ft²/ft/°F |
| Thermal Conductivity at 212°F (100°C) | 16.0 W/m-°K |
| Electrical Resistivity | 72 Microhm-cm at 20°C |
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