ASTM A688 TP304N Stainless Steel Tube For Power Plant Feedwater Heaters
ASTM A688 TP304N Stainless Steel Tube For Power Plant Feedwater Heaters
Specifications
ASTM A688 specification covers seamless and welded austenitic stainless steel feedwater heater tubes including those bent,if specified, into the form of U-tubes for application in tubularfeed-water heaters. The TP304N grade is a nitrogen-strengthened version of the standard Type 304. The addition of nitrogen significantly increases yield and tensile strength without a major cost premium.
We offer ASTM A688 TP304N seamless and welded stainless steel tube for feedwater heaters, Austenitic stainless steel and Ferritic stainless steels, surface condition in annealing and pickling, or bright annealed finishing, used in heat exchanger, boiler, condenser, heat transfer system.
| American Standard | Standard Name |
| A 688 / SA 688 | Seamless and Welded Austenitic Stainless Steel Feedwater Heater Tubes |
ASTM A688 TP304N Stainless Steel Tube Chemical Composition
(Sources American Standard A668 / A668M TABLE 1 Chemical Requirements)
| Grade | TP 304N |
| UNS DesignationA | S30451 |
| Element | Composition, % |
| C, Max | 0.08 |
| Mn, Max | 2 |
| Ph, Max | 0.04 |
| S, Max | 0.03 |
| Si,,Max | 0.75 |
| Ni | 8.00-1.00 |
| Cr | 18.00-20.00 |
| Mo | — |
| N | 0.10-0.16 |
ASTM A688 TP304N Stainless Steel Tube Mechanical Properties
(Sources American Standard A688 / A688M TABLE 2 Tensile Requirements)
| Grade | UNS Designation | Tensile strength, | Yield strength, | ElongationA |
| min, | min | in 2 in. or 50 | ||
| ksi[MPa] | ksi[MPa] | mm, min,% | ||
| TP 304N | S30451 | 80 [550] | 35 [240] | 35 |
ASTM A688 TP304N Stainless Steel Tube Application
- High-Strength Heat Exchangers
- Power Plant Feedwater Heaters
- High-Pressure Process Heat Exchangers
- Industrial Coolers
- Power Generation
- High-pressure feedwater heaters in fossil-fuel power stations (coal, natural gas)
- Oil & Gas
- Marine and Shipbuilding
- General Industrial Machinery
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