| Application | Recommended Grades | Recommended Surface | Key Reason |
|---|---|---|---|
| Thermal Power Plants | 304 / 316L / 321 / 347 | 2B / No.1 | Corrosion and high-temperature resistance |
| Boilers & Superheaters | 321 / 347 / 310S | No.1 / 2B | High-temperature strength and oxidation resistance |
| Heat Exchangers | 304L / 316L / 2205 | 2B / No.1 | Corrosion resistance and heat-transfer service |
| Nuclear Power | 304L / 316L / 321 / 347 | 2B / No.1 | Corrosion resistance and high-temperature service |
| Solar Power | 304 / 316L / 321 | 2B / BA / No.1 | Weather, corrosion and thermal resistance |
| Wind Power | 304 / 316L / 2205 | 2B / No.1 | Strength and atmospheric/marine corrosion resistance |
| Hydropower | 304 / 316L / 2205 | No.1 / 2B | Water corrosion resistance and strength |
| Offshore Wind Power | 316L / 2205 / 2507 | No.1 / 2B | Chloride and marine corrosion resistance |
| Geothermal Power | 316L / 2205 / 2507 | 2B / No.1 | Resistance to aggressive geothermal fluids |
| Waste-to-Energy | 316L / 321 / 310S / 2205 | No.1 | High temperature and corrosive flue gas |
| Hydrogen Energy | 316L / 304L / 310S | 2B / BA | Corrosion resistance and process compatibility |
| Energy Storage | 304 / 316L / 2205 | 2B / BA | Corrosion resistance and durability |
| Power Generation Equipment | 304 / 316L / 321 / 347 | 2B / No.1 | General corrosion and temperature resistance |
| Gas Turbines | 321 / 347 / 310S | No.1 | High-temperature strength and oxidation resistance |
| Cooling Systems | 304 / 316L / 2205 | 2B / No.1 | Water and chloride corrosion resistance |
| Power Plant Structures | 304 / 316L / 2205 | No.1 / 2B | Strength and durability |
304 / 316L / 321 / 347 / 310S
Thermal power equipment involves elevated temperatures, steam, water, combustion gases and demanding operating conditions.
304 / 304L
Suitable for general-purpose equipment and piping-related components.
316L
Preferred where higher corrosion resistance is required, especially in cooling-water and chloride-containing environments.
321 / 347
Suitable for high-temperature components where resistance to sensitization and high-temperature performance are important.
310S
Recommended for components exposed to particularly high-temperature oxidation environments. Power-generation references identify 321/347 for high-temperature strength and 310S for oxidation resistance.
Boilers · Heat Exchangers · Steam Systems · Flue Gas Equipment · Cooling Systems · Structural Components
321 / 321H / 347 / 347H / 310S
This is a temperature-critical application.
321 / 321H
Titanium-stabilized grades suitable for elevated-temperature service.
347 / 347H
Niobium-stabilized grades used for high-temperature applications.
310S
Provides excellent oxidation resistance at elevated temperatures.
Power-generation tube references specifically list 321/321H and 347/347H for high-temperature strength, while 310S is selected for oxidation resistance.
304L / 316L / 2205
304L — General-purpose heat exchanger applications.
316L — Better choice for chloride-containing cooling water and more corrosive environments.
2205 — Suitable when higher strength and enhanced chloride corrosion resistance are required.
Feedwater Heaters · Condensers · Process Heat Exchangers · Cooling Equipment · Energy Recovery Systems
304L / 316L / 321 / 347
Nuclear power applications place strong emphasis on material reliability, corrosion resistance, cleanliness, traceability and long-term service performance.
304/L, 316/L, 321 and 347 are among the stainless grades used in nuclear-power applications.
Reactor Systems · Cooling Systems · Heat Exchangers · Steam Systems · Structural Components · Auxiliary Equipment
304 / 316L / 321
2B / BA / No.1
304 is suitable for general solar-energy equipment.
316L is preferred for outdoor and coastal environments.
321 can be considered for components experiencing elevated or cyclic temperatures.
Solar Thermal Equipment · Solar Energy Structures · Heat Transfer Components · Equipment Enclosures · Support Components
304 / 316L / 2205
304
Suitable for general onshore applications.
316L
Preferred for outdoor environments with higher moisture or salt exposure.
2205
Recommended where higher mechanical strength and improved chloride corrosion resistance are required.
Wind Turbine Components · Nacelle Components · Structural Parts · Cooling Systems · Equipment Enclosures
316L / 2205 / 2507
Offshore environments are significantly more demanding because of salt spray, seawater and chloride exposure.
316L — General marine-grade option.
2205 — Higher strength and improved chloride resistance.
2507 — Suitable for particularly aggressive chloride-containing environments.
Duplex and super duplex grades are widely associated with offshore and seawater service.
304 / 316L / 2205
Hydropower equipment is continuously exposed to water and, depending on the site, potentially aggressive water chemistry.
304 — General water environments.
316L — Better for chloride-containing water.
2205 — Suitable where higher strength and corrosion resistance are required.
Hydraulic Equipment · Water Systems · Turbine Components · Heat Exchangers · Structural Components
316L / 2205 / 2507
Geothermal fluids can contain chlorides, sulfides and other corrosive species, so grade selection should be based on the actual fluid chemistry and operating temperature.
316L — Moderate corrosive environments.
2205 — Higher strength and corrosion resistance.
2507 — More aggressive chloride environments.
For geothermal projects, the final grade should always be selected based on the actual brine/fluid composition rather than temperature alone.
316L / 321 / 310S / 2205
Waste-to-energy equipment can encounter a combination of:
High Temperature · Flue Gas · Chlorides · Condensation · Corrosive Deposits
316L — General corrosion-resistant applications.
321 — Elevated-temperature service.
310S — High-temperature oxidation resistance.
2205 — Selected applications requiring higher strength and chloride resistance.
High-temperature and waste-energy systems can involve both stainless and nickel-based alloys depending on the severity of the environment.
304L / 316L / 310S
Hydrogen Production · Electrolyzers · Hydrogen Storage Systems · Hydrogen Processing Equipment · Fuel Cell Systems
316L is widely considered for corrosion-resistant process components, while the final material choice should account for hydrogen service conditions, pressure, temperature and component design.
Stainless steels are used in electrolyzers and fuel-cell systems within the hydrogen-energy sector.
304 / 316L / 2205
Battery Enclosures · Energy Storage Cabinets · Cooling Systems · Structural Components · Thermal Management Systems
304 — General indoor equipment.
316L — Outdoor, humid or corrosive environments.
2205 — Higher-strength structural applications.
321 / 347 / 310S
Gas turbines involve elevated temperatures and oxidation conditions.
321 / 347 are suitable for high-temperature service where stabilized stainless steel is required.
310S is preferred where high-temperature oxidation resistance is a primary consideration. Power-generation material references specifically identify 321/347 for high-temperature strength and 310S for oxidation resistance.
304 / 316L / 2205
304 — Freshwater and relatively mild environments.
316L — Chloride-containing cooling water and more corrosive conditions.
2205 — Higher chloride exposure and applications requiring greater strength.
Cooling Water Systems · Heat Exchangers · Condensers · Cooling Equipment · Water Treatment Systems
| Application / Environment | Recommended Grade |
|---|---|
| General Power Equipment | 304 / 316L |
| Thermal Power | 304 / 316L / 321 |
| Boiler | 321 / 347 / 310S |
| Superheater | 321H / 347H / 310S |
| Heat Exchanger | 304L / 316L / 2205 |
| Nuclear Power | 304L / 316L / 321 / 347 |
| Solar Power | 304 / 316L / 321 |
| Onshore Wind | 304 / 316L / 2205 |
| Offshore Wind | 316L / 2205 / 2507 |
| Hydropower | 304 / 316L / 2205 |
| Geothermal | 316L / 2205 / 2507 |
| Waste-to-Energy | 316L / 321 / 310S / 2205 |
| Hydrogen Energy | 304L / 316L |
| Energy Storage | 304 / 316L / 2205 |
| Gas Turbine | 321 / 347 / 310S |
| Cooling System | 304 / 316L / 2205 |
| Application | Recommended Surface |
|---|---|
| General Power Equipment | 2B / No.1 |
| Heat Exchanger | 2B / No.1 |
| Boiler | No.1 / 2B |
| Superheater | No.1 |
| Nuclear Equipment | 2B / No.1 |
| Solar Equipment | 2B / BA / No.1 |
| Wind Power | 2B / No.1 |
| Offshore Wind | No.1 / 2B |
| Hydropower | No.1 / 2B |
| Energy Storage | 2B / BA |
| Hydrogen Equipment | 2B / BA |
| High-Temperature Equipment | No.1 |
Good balance of corrosion resistance, fabrication performance and cost, suitable for general power equipment and relatively mild environments.
Recommended where exposure to chlorides, moisture, seawater or more aggressive process environments is expected.
Titanium-stabilized stainless steel for elevated-temperature service.
Niobium-stabilized stainless steel suitable for demanding high-temperature applications.
High chromium and nickel content provides excellent oxidation resistance at elevated temperatures.
Excellent combination of mechanical strength and corrosion resistance, particularly useful in demanding energy and offshore applications.
For highly demanding applications involving seawater, brine and severe chloride exposure.
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