We are professional AISI 304L TP304L SS304L SS 304L 304 L SS Tp 304L UNS S30403 1.4307 stainless steel tube bundles Tubing Bundles For shell tube Heat exchanger Boiler condensors heaters coolers evaporators from china
A tube bundle heat exchanger with baffles is disclosed wherein a tube bundle is housed within an inner casing which is acted upon from both the inside and the outside by a heating medium
A multiple tube bundle heat exchanger includes axially opposite tube plates, a housing, and a plurality of tube bundles disposed between the tube plates. Each of the tube bundles is an independent tube bundle subassembly forming an integral unit having at least one heat exchanger tube with two axial tube ends.
Alloys 304 (S30400) and 304L (S30403) stainless steels are variations of the 18 percent chromium – 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family.
High strength, excellent corrosion resistance and minimized carbon content make Alloy 304 and 304L Stainless Steels useful for applications where welding is required. Uses include architectural mouldings and trim, welded components of chemical, textile, paper, pharmaceutical and chemical industry processing equipment.
Other advantages are its resistance to oxidation, excellent formability, ease of fabrication and cleaning, excellent strength to weight ratio and good toughness at cryogenic temperatures.
For severely corrosive environments,the lower content of Type 304L is preferred because of its greater immunity to intergranular corrosion.
| Temper | 304 | 304L |
|---|
| Tensile Rm | 76 | ksi (min) | 70 | ksi (min) |
| Tensile Rm | 517 | MPa (min) | 485 | MPa (min) |
| R.p. 0.2% Yield | 31 | ksi (min) | 25 | ksi (min) |
| R.p. 0.2% Yield | 207 | MPa (min) | 170 | MPa (min) |
| Elongation (2" or 4D gl) | 40 | % (min) | 40 | % (min) |
Physical Properties (Room Temperature)
| Specific Heat (0-100°C) | 500 | J.kg-1.°K-1 |
| Thermal Conductivity | 16.2 | W.m -1.°K-1 |
| Thermal Expansion | 17.2 | mm/m/°C |
| Modulus Elasticity | 19.3 | GPa |
| Electrical Resistivity | 7.23 | μohm/cm |
| Density | 8.0 | g/cm3 |
Chemical Composition (% by weight)
| | 304 | 304L |
|---|
| Element | Min | Max | Min | Max |
|---|
| C | - | 0.08 | - | 0.08 |
| Mn | - | 2 | - | 2 |
| Ni | 8 | 10.5 | 8 | 12.0 |
| Cr | 18 | 20 | 18 | 20 |
| S | - | 0.03 | - | 0.03 |
| N | - | 0.1 | - | 0.1 |
| Si | - | 0.75 | - | 0.75 |
| P | - | 0.045 | - | 0.045 |
