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ASTM A789 S32205(S31803, 1.4462) Duplex Steel Seamless U Bend Tube ,For Heat Exchanger
Overview
The standard for ASTM A789 S32205 U bend tubes is defined by ASTM A789/A789M, which is the specification for seamless and welded ferritic/austenitic stainless steel tubing for general service.ASTM A789 S32205 is a grade designation for duplex stainless steel, specifically Duplex 2205. Duplex stainless steel is characterized by its high strength and excellent corrosion resistance. It consists of a balanced mixture of ferrite and austenite phases in its microstructure.
The benefits of ASTM A789 U Bend Tube
Space-saving design: U bend tubes have a curved shape that allows for easy installation and efficient use of space in heat exchanger systems. The bent configuration helps to save valuable space without compromising the functionality of the tubing.Enhanced fluid flow: The U-shaped configuration of the tubes promotes better fluid flow within heat exchangers. The curved design reduces pressure drop and improves heat transfer efficiency, resulting in enhanced performance and energy savings...
Chemical Composition of ASTM A789 S32205
| Grade | C | Mn | S | P | Si | Ni | Cr | Mo | N | |
| S32205 | Min | 4.5 | 22.0 | 3.0 | 0.14 | |||||
| Max | 0.03 | 2.0 | 0.02 | 0.03 | 1.0 | 6.5 | 23.0 | 3.5 | 0.20 |
Mechanical Properies of ASTM A789 S32205
| Grade | Tensile Str Ksi(Mpa) | Yield Str Ksi(Mpa) | Elongation(%) | Brinell(HBW) | Rockwell C(HRC) |
| S32205 | ≥95(655) | ≥70(485) | ≥25 | ≥290 | ≥30 |
Wall Thickness Tolerance of ASTM A789
| OD Range | TYPE | Wall Thickness Tolerance | |
| Average | Mln. | ||
| 0~12.7mm (Incl.) | SMLS&WLD | (+/-15%) | (0,+30%) |
| 12.7~38.1mm (Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
| 38.1~88.9mm (Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
| 88.9~139.7mm(Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
| 139.7~203.2mm(Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
Length Tolerance of ASTM A789
| Length Tolerance | |||
| Range(m) | TYPE | OD range | Tolerance |
| 0~24ft (7.3m Incl.) | SMLS+Hot Finished | All Sizes | 0,+5mm |
| 0~24ft (7.3m Incl.) | SMLS+Cold Finished | <50.8mm | 0,+3mm |
| 0~24ft (7.3m Incl.) | SMLS+Cold Finished | 50.8mm(Incl.) to Up | 0,+5mm |
| 0~24ft (7.3m Incl.) | WLD | <50.8mm | 0,+3mm |
| 0~24ft (7.3m Incl.) | WLD | 50.8mm(Incl.) to Up | 0,+5mm |
