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ASTM A249 TP304L Austenitic Stainless Steel Welded Heat Exchanger Tubes
ASTM A249 This specification covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from the austenitic, steels with various grades intended for such use as boiler, superheater, heat exchanger, or condenser tubes.
YuHong Group, one of the leading suppliers in China,we supply austenitic stainless steel welded tubes with high quality to our customers and we have many experiences in exporting.
ASTM A249/ASME SA249
TP304, TP304L, TP316, TP316L, TP321, TP321H, TP310S, TP347H, etc
Characteristic
304L Stainless Steel Pipe 18Cr-8Ni-low carbon As a low C 304 steel, in the general state, its corrosion resistance is similar to that of 304 steel, but after welding or stress relieving, its resistance to grain boundary corrosion is excellent; in the absence of heat treatment, it also maintains good corrosion resistance, and the use of the temperature - 196 ℃ ~ 800 ℃. It is used in the chemical, coal and petroleum industries where high resistance to grain boundary corrosion is required, as well as in field and open-air machines, heat-resistant parts for building materials and parts that are difficult to heat-treat.
Smooth inner wall of the pipe, low resistance to water transmission, can withstand high water flow rate erosion, solid solution treatment, the mechanical properties of the weld channel and the matrix, corrosion resistance is basically the same, deep processing performance is excellent.
18Cr-8Ni As a widely used steel, it has good corrosion resistance, heat resistance, low-temperature strength and mechanical properties; good hot workability such as stamping, bending, etc., no heat treatment hardening phenomenon (non-magnetic, use temperature -196℃~800℃).
Equal Material
| Gr. | UNS No. | Old British | Euro Norm | Swedish | Japanese |
| TP304L | S30403 | 304S31 | 1.4306/1.4307 | SS2332 | JIS SUS 304L |
Chemical Composition % Max
| C | Mn | P | S | Si | Cr | Ni |
| 0.03 | 2 | 0.045 | 0.03 | 1 | 18-20 | 8-12 |
For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040% is necessary in Grades TP304L and TP316L.
Mechanical Property
| Gr. | Tensile Strength min | Yield Strength min | Elongation (%) | Rockwell Hardness Number,max |
| TP304L | 70ksi ( 485MPa ) | 25ksi ( 170MPa ) | 35 min | B90 |
Applications
Oil & Gas Industry Petrochemical Industry Pharmaceutical industry
Food Industry Nuclear Power Generation Petroleum Industry
Heat Exchangers/Boilers/Condensers,etc
Welcome your inquiry of SS welded tubes to YUHONG Group!