A249 304L stainless steel welded tube is produced complying with ASTM standard, SS304L grade and bright annealing finishing, 19.05 mm (0.75 inch) OD, 1.25 mm (0.049 inch) Wall thickness, it is common size used for heat excahnger ,condenser and other heating process system.
304L stainless steel features
SS 304L is low carbon 304 Austenitic stainless steel, in detail, carbon content in 304L is max 0.035%, this can improve corrosion performance for many applications, 304L Mechanical Properties contain tensile strength Max 483 Mpa, Yield point Max 170 Mpa, Elongation 35% and hardness min 90 (HRB), it is non magnetic grade, and an ideal material for welding tube.
Other stainless steels are available for welded tube, such as 304, 316, 316L, 321, 316Ti and duplex grades.
A249 304L Stainless Steel Welded Tube specification
- Specifications: ASTM A249 / ASME SA249
- Grade: 304L
- Finishing: Annealing, bright annealing, polishing
- OD: 16, 190.5, 25.4, 31.8, 38.1, 44.45, 50.8, 60.3 mm
- Wth: 0.71, 0.89, 1.0, 1.25, 1.5, 1.65, 2.11 mm
- Forms: round tube, coiled tube, U bend tube
TIG Welding Stainless Steel Tube
We manufacture ASTM A249 304L stainless steel welded tube using TIG (Tungsten Inert Gas) welding method, TIG welding can protect tube surface from oxidation, making welding bead integrity with base metal, and the same level, argon tungsten-arc welding usually is used for thin wall thickness stainless steel tube, and this welding type stainless steel tubes are suitable for heat exchanger system.
Annealed pickling stainless steel welded tube
A249 welded tube should be annealed solution after welding, general Austenitic stainless steel heat treatment temperature from 1040 to 1150 degree Celsius, different grades have different annealing temperatures, this process can remove oxidation scale, plain grain structure and relieve stress, making tube soft and easy to fabricate, after annealing, ss tubes should be pickling in mixture of acid, removing scale and cleaning the surface, then passivation condition form a layer of oxidation film protecting tubes.
Bright annealing stainless steel welded tube
Bright annealing (BA) finish is an another surface condition, it improve tube surface bright level and make surface more clean, a perfect additional requirement beside annealing passivation finishing.